7:09 a.m.
This series adds both riscv32 and riscv64 kvm support, and implements
migration based on riscv.
Because of RISC-V KVM has been merged into the Linux master, so this
series are changed from RFC to patch.
Several steps to use this:
1. Build emulation
$ ./configure --target-list=riscv64-softmmu
$ make -j$(nproc)
2. Build kernel
3. Build QEMU VM
Cross built in riscv toolchain.
$ PKG_CONFIG_LIBDIR=<toolchain pkgconfig path>
$ export PKG_CONFIG_SYSROOT_DIR=<toolchain sysroot path>
$ ./configure --target-list=riscv64-softmmu --enable-kvm \
--cross-prefix=riscv64-linux-gnu- --disable-libiscsi --disable-glusterfs \
--disable-libusb --disable-usb-redir --audio-drv-list= --disable-opengl \
--disable-libxml2
$ make -j$(nproc)
4. Start emulation
$ ./qemu-system-riscv64 -M virt -m 4096M -cpu rv64,x-h=true -nographic \
-name guest=riscv-hyp,debug-threads=on \
-smp 4 \
-bios ./fw_jump.bin \
-kernel ./Image \
-drive file=./hyp.img,format=raw,id=hd0 \
-device virtio-blk-device,drive=hd0 \
-append "root=/dev/vda rw console=ttyS0 earlycon=sbi"
5. Start kvm-acceled QEMU VM in emulation
$ ./qemu-system-riscv64 -M virt,accel=kvm -m 1024M -cpu host -nographic \
-name guest=riscv-guset \
-smp 2 \
-bios none \
-kernel ./Image \
-drive file=./guest.img,format=raw,id=hd0 \
-device virtio-blk-device,drive=hd0 \
-append "root=/dev/vda rw console=ttyS0 earlycon=sbi"
Changes since patch v2
- Create a macro for get and put timer csr.
- Remove M-mode PLIC contexts when kvm is enabled.
- Add get timer frequency.
- Move cpu_host_load to vmstate_kvmtimer.
Changes since patch v1
- Rebase on recent commit a216e7cf119c91ffdf5931834a1a030ebea40d70
- Sync-up headers with Linux-5.16-rc4.
- Fixbug in kvm_arch_init_vcpu.
- Create a macro for get and put regs csr.
- Start kernel directly when kvm_enabled.
- Use riscv_cpu_set_irq to inject KVM interrupts.
- Use the Semihosting Console API for RISC-V kvm handle sbi.
- Update vmstate_riscv_cpu version id.
Placing kvm_timer into a subsection.
Changes since RFC v6
- Rebase on recent commit 8627edfb3f1fca24a96a0954148885c3241c10f8
- Sync-up headers with Linux-5.16-rc1
Changes since RFC v5
- Rebase on QEMU v6.1.0-rc1 and kvm-riscv linux v19.
- Move kvm interrupt setting to riscv_cpu_update_mip().
- Replace __u64 with uint64_t.
Changes since RFC v4
- Rebase on QEMU v6.0.0-rc2 and kvm-riscv linux v17.
- Remove time scaling support as software solution is incomplete.
Because it will cause unacceptable performance degradation. and
We will post a better solution.
- Revise according to Alistair's review comments.
- Remove compile time XLEN checks in kvm_riscv_reg_id
- Surround TYPE_RISCV_CPU_HOST definition by CONFIG_KVM and share
it between RV32 and RV64.
- Add kvm-stub.c for reduce unnecessary compilation checks.
- Add riscv_setup_direct_kernel() to direct boot kernel for KVM.
Changes since RFC v3
- Rebase on QEMU v5.2.0-rc2 and kvm-riscv linux v15.
- Add time scaling support(New patches 13, 14 and 15).
- Fix the bug that guest vm can't reboot.
Changes since RFC v2
- Fix checkpatch error at target/riscv/sbi_ecall_interface.h.
- Add riscv migration support.
Changes since RFC v1
- Add separate SBI ecall interface header.
- Add riscv32 kvm accel support.
Yifei Jiang (12):
update-linux-headers: Add asm-riscv/kvm.h
target/riscv: Add target/riscv/kvm.c to place the public kvm interface
target/riscv: Implement function kvm_arch_init_vcpu
target/riscv: Implement kvm_arch_get_registers
target/riscv: Implement kvm_arch_put_registers
target/riscv: Support start kernel directly by KVM
target/riscv: Support setting external interrupt by KVM
target/riscv: Handle KVM_EXIT_RISCV_SBI exit
target/riscv: Add host cpu type
target/riscv: Add kvm_riscv_get/put_regs_timer
target/riscv: Implement virtual time adjusting with vm state changing
target/riscv: Support virtual time context synchronization
hw/intc/sifive_plic.c | 8 +-
hw/riscv/boot.c | 16 +-
hw/riscv/virt.c | 87 +++--
include/hw/riscv/boot.h | 1 +
linux-headers/asm-riscv/kvm.h | 128 +++++++
meson.build | 2 +
target/riscv/cpu.c | 29 +-
target/riscv/cpu.h | 11 +
target/riscv/kvm-stub.c | 30 ++
target/riscv/kvm.c | 533 +++++++++++++++++++++++++++++
target/riscv/kvm_riscv.h | 25 ++
target/riscv/machine.c | 30 ++
target/riscv/meson.build | 1 +
target/riscv/sbi_ecall_interface.h | 72 ++++
14 files changed, 944 insertions(+), 29 deletions(-)
create mode 100644 linux-headers/asm-riscv/kvm.h
create mode 100644 target/riscv/kvm-stub.c
create mode 100644 target/riscv/kvm.c
create mode 100644 target/riscv/kvm_riscv.h
create mode 100644 target/riscv/sbi_ecall_interface.h
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 01/12] update-linux-headers: Add asm-riscv/kvm.h
Add asm-riscv/kvm.h for RISC-V KVM, and update linux/kvm.h
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Acked-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
linux-headers/asm-riscv/kvm.h | 128 ++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
create mode 100644 linux-headers/asm-riscv/kvm.h
diff --git a/linux-headers/asm-riscv/kvm.h b/linux-headers/asm-riscv/kvm.h
new file mode 100644
index 0000000000..f808ad1ce5
--- /dev/null
+++ b/linux-headers/asm-riscv/kvm.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.patel(a)wdc.com>
+ */
+
+#ifndef __LINUX_KVM_RISCV_H
+#define __LINUX_KVM_RISCV_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <asm/ptrace.h>
+
+#define __KVM_HAVE_READONLY_MEM
+
+#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
+
+#define KVM_INTERRUPT_SET -1U
+#define KVM_INTERRUPT_UNSET -2U
+
+/* for KVM_GET_REGS and KVM_SET_REGS */
+struct kvm_regs {
+};
+
+/* for KVM_GET_FPU and KVM_SET_FPU */
+struct kvm_fpu {
+};
+
+/* KVM Debug exit structure */
+struct kvm_debug_exit_arch {
+};
+
+/* for KVM_SET_GUEST_DEBUG */
+struct kvm_guest_debug_arch {
+};
+
+/* definition of registers in kvm_run */
+struct kvm_sync_regs {
+};
+
+/* for KVM_GET_SREGS and KVM_SET_SREGS */
+struct kvm_sregs {
+};
+
+/* CONFIG registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+struct kvm_riscv_config {
+ unsigned long isa;
+};
+
+/* CORE registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+struct kvm_riscv_core {
+ struct user_regs_struct regs;
+ unsigned long mode;
+};
+
+/* Possible privilege modes for kvm_riscv_core */
+#define KVM_RISCV_MODE_S 1
+#define KVM_RISCV_MODE_U 0
+
+/* CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+struct kvm_riscv_csr {
+ unsigned long sstatus;
+ unsigned long sie;
+ unsigned long stvec;
+ unsigned long sscratch;
+ unsigned long sepc;
+ unsigned long scause;
+ unsigned long stval;
+ unsigned long sip;
+ unsigned long satp;
+ unsigned long scounteren;
+};
+
+/* TIMER registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
+struct kvm_riscv_timer {
+ __u64 frequency;
+ __u64 time;
+ __u64 compare;
+ __u64 state;
+};
+
+/* Possible states for kvm_riscv_timer */
+#define KVM_RISCV_TIMER_STATE_OFF 0
+#define KVM_RISCV_TIMER_STATE_ON 1
+
+#define KVM_REG_SIZE(id) \
+ (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
+
+/* If you need to interpret the index values, here is the key: */
+#define KVM_REG_RISCV_TYPE_MASK 0x00000000FF000000
+#define KVM_REG_RISCV_TYPE_SHIFT 24
+
+/* Config registers are mapped as type 1 */
+#define KVM_REG_RISCV_CONFIG (0x01 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_CONFIG_REG(name) \
+ (offsetof(struct kvm_riscv_config, name) / sizeof(unsigned long))
+
+/* Core registers are mapped as type 2 */
+#define KVM_REG_RISCV_CORE (0x02 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_CORE_REG(name) \
+ (offsetof(struct kvm_riscv_core, name) / sizeof(unsigned long))
+
+/* Control and status registers are mapped as type 3 */
+#define KVM_REG_RISCV_CSR (0x03 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_CSR_REG(name) \
+ (offsetof(struct kvm_riscv_csr, name) / sizeof(unsigned long))
+
+/* Timer registers are mapped as type 4 */
+#define KVM_REG_RISCV_TIMER (0x04 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_TIMER_REG(name) \
+ (offsetof(struct kvm_riscv_timer, name) / sizeof(__u64))
+
+/* F extension registers are mapped as type 5 */
+#define KVM_REG_RISCV_FP_F (0x05 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_FP_F_REG(name) \
+ (offsetof(struct __riscv_f_ext_state, name) / sizeof(__u32))
+
+/* D extension registers are mapped as type 6 */
+#define KVM_REG_RISCV_FP_D (0x06 << KVM_REG_RISCV_TYPE_SHIFT)
+#define KVM_REG_RISCV_FP_D_REG(name) \
+ (offsetof(struct __riscv_d_ext_state, name) / sizeof(__u64))
+
+#endif
+
+#endif /* __LINUX_KVM_RISCV_H */
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 02/12] target/riscv: Add target/riscv/kvm.c to place the public kvm interface
Add target/riscv/kvm.c to place kvm_arch_* function needed by
kvm/kvm-all.c. Meanwhile, add kvm support in meson.build file.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
meson.build | 2 +
target/riscv/kvm.c | 133 +++++++++++++++++++++++++++++++++++++++
target/riscv/meson.build | 1 +
3 files changed, 136 insertions(+)
create mode 100644 target/riscv/kvm.c
diff --git a/meson.build b/meson.build
index 2495360fd0..e74633b42c 100644
--- a/meson.build
+++ b/meson.build
@@ -85,6 +85,8 @@ elif cpu in ['ppc', 'ppc64']
kvm_targets = ['ppc-softmmu', 'ppc64-softmmu']
elif cpu in ['mips', 'mips64']
kvm_targets = ['mips-softmmu', 'mipsel-softmmu',
'mips64-softmmu', 'mips64el-softmmu']
+elif cpu in ['riscv']
+ kvm_targets = ['riscv32-softmmu', 'riscv64-softmmu']
else
kvm_targets = []
endif
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
new file mode 100644
index 0000000000..687dd4b621
--- /dev/null
+++ b/target/riscv/kvm.c
@@ -0,0 +1,133 @@
+/*
+ * RISC-V implementation of KVM hooks
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>;.
+ */
+
+#include "qemu/osdep.h"
+#include <sys/ioctl.h>
+
+#include <linux/kvm.h>
+
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
+#include "sysemu/kvm_int.h"
+#include "cpu.h"
+#include "trace.h"
+#include "hw/pci/pci.h"
+#include "exec/memattrs.h"
+#include "exec/address-spaces.h"
+#include "hw/boards.h"
+#include "hw/irq.h"
+#include "qemu/log.h"
+#include "hw/loader.h"
+
+const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
+ KVM_CAP_LAST_INFO
+};
+
+int kvm_arch_get_registers(CPUState *cs)
+{
+ return 0;
+}
+
+int kvm_arch_put_registers(CPUState *cs, int level)
+{
+ return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+ return 0;
+}
+
+int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
+ uint64_t address, uint32_t data, PCIDevice *dev)
+{
+ return 0;
+}
+
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+ return 0;
+}
+
+unsigned long kvm_arch_vcpu_id(CPUState *cpu)
+{
+ return cpu->cpu_index;
+}
+
+void kvm_arch_init_irq_routing(KVMState *s)
+{
+}
+
+int kvm_arch_init_vcpu(CPUState *cs)
+{
+ return 0;
+}
+
+int kvm_arch_msi_data_to_gsi(uint32_t data)
+{
+ abort();
+}
+
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+ int vector, PCIDevice *dev)
+{
+ return 0;
+}
+
+int kvm_arch_init(MachineState *ms, KVMState *s)
+{
+ return 0;
+}
+
+int kvm_arch_irqchip_create(KVMState *s)
+{
+ return 0;
+}
+
+int kvm_arch_process_async_events(CPUState *cs)
+{
+ return 0;
+}
+
+void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run)
+{
+}
+
+MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run)
+{
+ return MEMTXATTRS_UNSPECIFIED;
+}
+
+bool kvm_arch_stop_on_emulation_error(CPUState *cs)
+{
+ return true;
+}
+
+int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
+{
+ return 0;
+}
+
+bool kvm_arch_cpu_check_are_resettable(void)
+{
+ return true;
+}
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index d5e0bc93ea..2faf08a941 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -19,6 +19,7 @@ riscv_ss.add(files(
'bitmanip_helper.c',
'translate.c',
))
+riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
riscv_softmmu_ss = ss.source_set()
riscv_softmmu_ss.add(files(
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 03/12] target/riscv: Implement function kvm_arch_init_vcpu
Get isa info from kvm while kvm init.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 32 +++++++++++++++++++++++++++++++-
1 file changed, 31 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 687dd4b621..ccf3753048 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,23 @@
#include "qemu/log.h"
#include "hw/loader.h"
+static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
+{
+ uint64_t id = KVM_REG_RISCV | type | idx;
+
+ switch (riscv_cpu_mxl(env)) {
+ case MXL_RV32:
+ id |= KVM_REG_SIZE_U32;
+ break;
+ case MXL_RV64:
+ id |= KVM_REG_SIZE_U64;
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ return id;
+}
+
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
@@ -79,7 +96,20 @@ void kvm_arch_init_irq_routing(KVMState *s)
int kvm_arch_init_vcpu(CPUState *cs)
{
- return 0;
+ int ret = 0;
+ target_ulong isa;
+ RISCVCPU *cpu = RISCV_CPU(cs);
+ CPURISCVState *env = &cpu->env;
+ uint64_t id;
+
+ id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
+ ret = kvm_get_one_reg(cs, id, &isa);
+ if (ret) {
+ return ret;
+ }
+ env->misa_ext = isa;
+
+ return ret;
}
int kvm_arch_msi_data_to_gsi(uint32_t data)
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 04/12] target/riscv: Implement kvm_arch_get_registers
Get GPR CSR and FP registers from kvm by KVM_GET_ONE_REG ioctl.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 112 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 111 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index ccf3753048..6d4df0ef6d 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -55,13 +55,123 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
return id;
}
+#define RISCV_CORE_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, \
+ KVM_REG_RISCV_CORE_REG(name))
+
+#define RISCV_CSR_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_CSR, \
+ KVM_REG_RISCV_CSR_REG(name))
+
+#define RISCV_FP_F_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_F, idx)
+
+#define RISCV_FP_D_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_D, idx)
+
+#define KVM_RISCV_GET_CSR(cs, env, csr, reg) \
+ do { \
+ int ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \
+ if (ret) { \
+ return ret; \
+ } \
+ } while(0)
+
+static int kvm_riscv_get_regs_core(CPUState *cs)
+{
+ int ret = 0;
+ int i;
+ target_ulong reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ ret = kvm_get_one_reg(cs, RISCV_CORE_REG(env, regs.pc), ®);
+ if (ret) {
+ return ret;
+ }
+ env->pc = reg;
+
+ for (i = 1; i < 32; i++) {
+ uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i);
+ ret = kvm_get_one_reg(cs, id, ®);
+ if (ret) {
+ return ret;
+ }
+ env->gpr[i] = reg;
+ }
+
+ return ret;
+}
+
+static int kvm_riscv_get_regs_csr(CPUState *cs)
+{
+ int ret = 0;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ KVM_RISCV_GET_CSR(cs, env, sstatus, env->mstatus);
+ KVM_RISCV_GET_CSR(cs, env, sie, env->mie);
+ KVM_RISCV_GET_CSR(cs, env, stvec, env->stvec);
+ KVM_RISCV_GET_CSR(cs, env, sscratch, env->sscratch);
+ KVM_RISCV_GET_CSR(cs, env, sepc, env->sepc);
+ KVM_RISCV_GET_CSR(cs, env, scause, env->scause);
+ KVM_RISCV_GET_CSR(cs, env, stval, env->stval);
+ KVM_RISCV_GET_CSR(cs, env, sip, env->mip);
+ KVM_RISCV_GET_CSR(cs, env, satp, env->satp);
+ return ret;
+}
+
+static int kvm_riscv_get_regs_fp(CPUState *cs)
+{
+ int ret = 0;
+ int i;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (riscv_has_ext(env, RVD)) {
+ uint64_t reg;
+ for (i = 0; i < 32; i++) {
+ ret = kvm_get_one_reg(cs, RISCV_FP_D_REG(env, i), ®);
+ if (ret) {
+ return ret;
+ }
+ env->fpr[i] = reg;
+ }
+ return ret;
+ }
+
+ if (riscv_has_ext(env, RVF)) {
+ uint32_t reg;
+ for (i = 0; i < 32; i++) {
+ ret = kvm_get_one_reg(cs, RISCV_FP_F_REG(env, i), ®);
+ if (ret) {
+ return ret;
+ }
+ env->fpr[i] = reg;
+ }
+ return ret;
+ }
+
+ return ret;
+}
+
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
int kvm_arch_get_registers(CPUState *cs)
{
- return 0;
+ int ret = 0;
+
+ ret = kvm_riscv_get_regs_core(cs);
+ if (ret) {
+ return ret;
+ }
+
+ ret = kvm_riscv_get_regs_csr(cs);
+ if (ret) {
+ return ret;
+ }
+
+ ret = kvm_riscv_get_regs_fp(cs);
+ if (ret) {
+ return ret;
+ }
+
+ return ret;
}
int kvm_arch_put_registers(CPUState *cs, int level)
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 05/12] target/riscv: Implement kvm_arch_put_registers
Put GPR CSR and FP registers to kvm by KVM_SET_ONE_REG ioctl
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 104 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 103 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 6d4df0ef6d..e695b91dc7 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -73,6 +73,14 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
} \
} while(0)
+#define KVM_RISCV_SET_CSR(cs, env, csr, reg) \
+ do { \
+ int ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \
+ if (ret) { \
+ return ret; \
+ } \
+ } while(0)
+
static int kvm_riscv_get_regs_core(CPUState *cs)
{
int ret = 0;
@@ -98,6 +106,31 @@ static int kvm_riscv_get_regs_core(CPUState *cs)
return ret;
}
+static int kvm_riscv_put_regs_core(CPUState *cs)
+{
+ int ret = 0;
+ int i;
+ target_ulong reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ reg = env->pc;
+ ret = kvm_set_one_reg(cs, RISCV_CORE_REG(env, regs.pc), ®);
+ if (ret) {
+ return ret;
+ }
+
+ for (i = 1; i < 32; i++) {
+ uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i);
+ reg = env->gpr[i];
+ ret = kvm_set_one_reg(cs, id, ®);
+ if (ret) {
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
static int kvm_riscv_get_regs_csr(CPUState *cs)
{
int ret = 0;
@@ -115,6 +148,24 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
return ret;
}
+static int kvm_riscv_put_regs_csr(CPUState *cs)
+{
+ int ret = 0;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ KVM_RISCV_SET_CSR(cs, env, sstatus, env->mstatus);
+ KVM_RISCV_SET_CSR(cs, env, sie, env->mie);
+ KVM_RISCV_SET_CSR(cs, env, stvec, env->stvec);
+ KVM_RISCV_SET_CSR(cs, env, sscratch, env->sscratch);
+ KVM_RISCV_SET_CSR(cs, env, sepc, env->sepc);
+ KVM_RISCV_SET_CSR(cs, env, scause, env->scause);
+ KVM_RISCV_SET_CSR(cs, env, stval, env->stval);
+ KVM_RISCV_SET_CSR(cs, env, sip, env->mip);
+ KVM_RISCV_SET_CSR(cs, env, satp, env->satp);
+
+ return ret;
+}
+
static int kvm_riscv_get_regs_fp(CPUState *cs)
{
int ret = 0;
@@ -148,6 +199,40 @@ static int kvm_riscv_get_regs_fp(CPUState *cs)
return ret;
}
+static int kvm_riscv_put_regs_fp(CPUState *cs)
+{
+ int ret = 0;
+ int i;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (riscv_has_ext(env, RVD)) {
+ uint64_t reg;
+ for (i = 0; i < 32; i++) {
+ reg = env->fpr[i];
+ ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), ®);
+ if (ret) {
+ return ret;
+ }
+ }
+ return ret;
+ }
+
+ if (riscv_has_ext(env, RVF)) {
+ uint32_t reg;
+ for (i = 0; i < 32; i++) {
+ reg = env->fpr[i];
+ ret = kvm_set_one_reg(cs, RISCV_FP_F_REG(env, i), ®);
+ if (ret) {
+ return ret;
+ }
+ }
+ return ret;
+ }
+
+ return ret;
+}
+
+
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
@@ -176,7 +261,24 @@ int kvm_arch_get_registers(CPUState *cs)
int kvm_arch_put_registers(CPUState *cs, int level)
{
- return 0;
+ int ret = 0;
+
+ ret = kvm_riscv_put_regs_core(cs);
+ if (ret) {
+ return ret;
+ }
+
+ ret = kvm_riscv_put_regs_csr(cs);
+ if (ret) {
+ return ret;
+ }
+
+ ret = kvm_riscv_put_regs_fp(cs);
+ if (ret) {
+ return ret;
+ }
+
+ return ret;
}
int kvm_arch_release_virq_post(int virq)
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 06/12] target/riscv: Support start kernel directly by KVM
Get kernel and fdt start address in virt.c, and pass them to KVM
when cpu reset. Add kvm_riscv.h to place riscv specific interface.
In addition, PLIC is created without M-mode PLIC contexts when KVM
is enabled.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
---
hw/intc/sifive_plic.c | 8 +++-
hw/riscv/boot.c | 16 +++++++-
hw/riscv/virt.c | 87 ++++++++++++++++++++++++++++------------
include/hw/riscv/boot.h | 1 +
target/riscv/cpu.c | 8 ++++
target/riscv/cpu.h | 3 ++
target/riscv/kvm-stub.c | 25 ++++++++++++
target/riscv/kvm.c | 14 +++++++
target/riscv/kvm_riscv.h | 24 +++++++++++
target/riscv/meson.build | 2 +-
10 files changed, 159 insertions(+), 29 deletions(-)
create mode 100644 target/riscv/kvm-stub.c
create mode 100644 target/riscv/kvm_riscv.h
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
index 877e76877c..1b2b4cc25e 100644
--- a/hw/intc/sifive_plic.c
+++ b/hw/intc/sifive_plic.c
@@ -30,6 +30,7 @@
#include "target/riscv/cpu.h"
#include "migration/vmstate.h"
#include "hw/irq.h"
+#include "sysemu/kvm.h"
#define RISCV_DEBUG_PLIC 0
@@ -555,8 +556,11 @@ DeviceState *sifive_plic_create(hwaddr addr, char *hart_config,
qdev_connect_gpio_out(dev, i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
- qdev_connect_gpio_out(dev, num_harts + i,
- qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
+
+ if (!kvm_enabled()) {
+ qdev_connect_gpio_out(dev, num_harts + i,
+ qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
+ }
}
return dev;
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index 519fa455a1..ccff662d89 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -30,6 +30,7 @@
#include "elf.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
+#include "sysemu/kvm.h"
#include <libfdt.h>
@@ -51,7 +52,9 @@ char *riscv_plic_hart_config_string(int hart_count)
CPUState *cs = qemu_get_cpu(i);
CPURISCVState *env = &RISCV_CPU(cs)->env;
- if (riscv_has_ext(env, RVS)) {
+ if (kvm_enabled()) {
+ vals[i] = "S";
+ } else if (riscv_has_ext(env, RVS)) {
vals[i] = "MS";
} else {
vals[i] = "M";
@@ -317,3 +320,14 @@ void riscv_setup_rom_reset_vec(MachineState *machine,
RISCVHartArrayState *harts
return;
}
+
+void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr)
+{
+ CPUState *cs;
+
+ for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
+ RISCVCPU *riscv_cpu = RISCV_CPU(cs);
+ riscv_cpu->env.kernel_addr = kernel_addr;
+ riscv_cpu->env.fdt_addr = fdt_addr;
+ }
+}
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 3af074148e..cc1a03f284 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -38,6 +38,7 @@
#include "chardev/char.h"
#include "sysemu/device_tree.h"
#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
#include "hw/pci/pci.h"
#include "hw/pci-host/gpex.h"
#include "hw/display/ramfb.h"
@@ -50,7 +51,11 @@ static const MemMapEntry virt_memmap[] = {
[VIRT_CLINT] = { 0x2000000, 0x10000 },
[VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 },
[VIRT_PCIE_PIO] = { 0x3000000, 0x10000 },
+#if defined(CONFIG_KVM)
+ [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 1) },
+#else
[VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) },
+#endif
[VIRT_UART0] = { 0x10000000, 0x100 },
[VIRT_VIRTIO] = { 0x10001000, 0x1000 },
[VIRT_FW_CFG] = { 0x10100000, 0x18 },
@@ -372,13 +377,22 @@ static void create_fdt_socket_plic(RISCVVirtState *s,
"sifive,plic-1.0.0", "riscv,plic0"
};
- plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
+ if (kvm_enabled()) {
+ plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+ } else {
+ plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
+ }
for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
- plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
- plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
- plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
- plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
+ if (kvm_enabled()) {
+ plic_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_S_EXT);
+ } else {
+ plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
+ plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
+ }
}
plic_phandles[socket] = (*phandle)++;
@@ -436,10 +450,12 @@ static void create_fdt_sockets(RISCVVirtState *s, const MemMapEntry
*memmap,
create_fdt_socket_memory(s, memmap, socket);
- if (s->have_aclint) {
- create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
- } else {
- create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ if (!kvm_enabled()) {
+ if (s->have_aclint) {
+ create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
+ } else {
+ create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ }
}
create_fdt_socket_plic(s, memmap, socket, phandle,
@@ -801,23 +817,25 @@ static void virt_machine_init(MachineState *machine)
hart_count, &error_abort);
sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_abort);
- /* Per-socket CLINT */
- riscv_aclint_swi_create(
- memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
- base_hartid, hart_count, false);
- riscv_aclint_mtimer_create(
- memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
- RISCV_ACLINT_SWI_SIZE,
- RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
- RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
- RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
-
- /* Per-socket ACLINT SSWI */
- if (s->have_aclint) {
+ if (!kvm_enabled()) {
+ /* Per-socket CLINT */
riscv_aclint_swi_create(
- memmap[VIRT_ACLINT_SSWI].base +
- i * memmap[VIRT_ACLINT_SSWI].size,
- base_hartid, hart_count, true);
+ memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
+ base_hartid, hart_count, false);
+ riscv_aclint_mtimer_create(
+ memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
+ RISCV_ACLINT_SWI_SIZE,
+ RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
+ RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
+ RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
+
+ /* Per-socket ACLINT SSWI */
+ if (s->have_aclint) {
+ riscv_aclint_swi_create(
+ memmap[VIRT_ACLINT_SSWI].base +
+ i * memmap[VIRT_ACLINT_SSWI].size,
+ base_hartid, hart_count, true);
+ }
}
/* Per-socket PLIC hart topology configuration string */
@@ -884,6 +902,16 @@ static void virt_machine_init(MachineState *machine)
memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base,
mask_rom);
+ /*
+ * Only direct boot kernel is currently supported for KVM VM,
+ * so the "-bios" parameter is ignored and treated like "-bios
none"
+ * when KVM is enabled.
+ */
+ if (kvm_enabled()) {
+ g_free(machine->firmware);
+ machine->firmware = g_strdup("none");
+ }
+
if (riscv_is_32bit(&s->soc[0])) {
firmware_end_addr = riscv_find_and_load_firmware(machine,
RISCV32_BIOS_BIN, start_addr, NULL);
@@ -941,6 +969,15 @@ static void virt_machine_init(MachineState *machine)
virt_memmap[VIRT_MROM].size, kernel_entry,
fdt_load_addr, machine->fdt);
+ /*
+ * Only direct boot kernel is currently supported for KVM VM,
+ * So here setup kernel start address and fdt address.
+ * TODO:Support firmware loading and integrate to TCG start
+ */
+ if (kvm_enabled()) {
+ riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
+ }
+
/* SiFive Test MMIO device */
sifive_test_create(memmap[VIRT_TEST].base);
diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
index baff11dd8a..5834c234aa 100644
--- a/include/hw/riscv/boot.h
+++ b/include/hw/riscv/boot.h
@@ -58,5 +58,6 @@ void riscv_rom_copy_firmware_info(MachineState *machine, hwaddr
rom_base,
hwaddr rom_size,
uint32_t reset_vec_size,
uint64_t kernel_entry);
+void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr);
#endif /* RISCV_BOOT_H */
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index f812998123..1c944872a3 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -29,6 +29,8 @@
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "fpu/softfloat-helpers.h"
+#include "sysemu/kvm.h"
+#include "kvm_riscv.h"
/* RISC-V CPU definitions */
@@ -380,6 +382,12 @@ static void riscv_cpu_reset(DeviceState *dev)
cs->exception_index = RISCV_EXCP_NONE;
env->load_res = -1;
set_default_nan_mode(1, &env->fp_status);
+
+#ifndef CONFIG_USER_ONLY
+ if (kvm_enabled()) {
+ kvm_riscv_reset_vcpu(cpu);
+ }
+#endif
}
static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 0760c0af93..2807eb1bcb 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -255,6 +255,9 @@ struct CPURISCVState {
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *timer; /* Internal timer */
+
+ hwaddr kernel_addr;
+ hwaddr fdt_addr;
};
OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
diff --git a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c
new file mode 100644
index 0000000000..39b96fe3f4
--- /dev/null
+++ b/target/riscv/kvm-stub.c
@@ -0,0 +1,25 @@
+/*
+ * QEMU KVM RISC-V specific function stubs
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>;.
+ */
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "kvm_riscv.h"
+
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
+{
+ abort();
+}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index e695b91dc7..db6d8a5b6e 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -37,6 +37,7 @@
#include "hw/irq.h"
#include "qemu/log.h"
#include "hw/loader.h"
+#include "kvm_riscv.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -369,6 +370,19 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
return 0;
}
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
+{
+ CPURISCVState *env = &cpu->env;
+
+ if (!kvm_enabled()) {
+ return;
+ }
+ env->pc = cpu->env.kernel_addr;
+ env->gpr[10] = kvm_arch_vcpu_id(CPU(cpu)); /* a0 */
+ env->gpr[11] = cpu->env.fdt_addr; /* a1 */
+ env->satp = 0;
+}
+
bool kvm_arch_cpu_check_are_resettable(void)
{
return true;
diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h
new file mode 100644
index 0000000000..f38c82bf59
--- /dev/null
+++ b/target/riscv/kvm_riscv.h
@@ -0,0 +1,24 @@
+/*
+ * QEMU KVM support -- RISC-V specific functions.
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>;.
+ */
+
+#ifndef QEMU_KVM_RISCV_H
+#define QEMU_KVM_RISCV_H
+
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
+
+#endif
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index 2faf08a941..fe41cc5805 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -19,7 +19,7 @@ riscv_ss.add(files(
'bitmanip_helper.c',
'translate.c',
))
-riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
+riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'), if_false:
files('kvm-stub.c'))
riscv_softmmu_ss = ss.source_set()
riscv_softmmu_ss.add(files(
--
2.19.1
12:03 a.m.
New subject: [PATCH v3 06/12] target/riscv: Support start kernel directly by KVM
On Mon, Dec 20, 2021 at 6:39 PM Yifei Jiang <jiangyifei(a)huawei.com> wrote:
Get kernel and fdt start address in virt.c, and pass them to KVM
when cpu reset. Add kvm_riscv.h to place riscv specific interface.
In addition, PLIC is created without M-mode PLIC contexts when KVM
is enabled.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
---
hw/intc/sifive_plic.c | 8 +++-
hw/riscv/boot.c | 16 +++++++-
hw/riscv/virt.c | 87 ++++++++++++++++++++++++++++------------
include/hw/riscv/boot.h | 1 +
target/riscv/cpu.c | 8 ++++
target/riscv/cpu.h | 3 ++
target/riscv/kvm-stub.c | 25 ++++++++++++
target/riscv/kvm.c | 14 +++++++
target/riscv/kvm_riscv.h | 24 +++++++++++
target/riscv/meson.build | 2 +-
10 files changed, 159 insertions(+), 29 deletions(-)
create mode 100644 target/riscv/kvm-stub.c
create mode 100644 target/riscv/kvm_riscv.h
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
index 877e76877c..1b2b4cc25e 100644
--- a/hw/intc/sifive_plic.c
+++ b/hw/intc/sifive_plic.c
@@ -30,6 +30,7 @@
#include "target/riscv/cpu.h"
#include "migration/vmstate.h"
#include "hw/irq.h"
+#include "sysemu/kvm.h"
#define RISCV_DEBUG_PLIC 0
@@ -555,8 +556,11 @@ DeviceState *sifive_plic_create(hwaddr addr, char *hart_config,
qdev_connect_gpio_out(dev, i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
- qdev_connect_gpio_out(dev, num_harts + i,
- qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
+
+ if (!kvm_enabled()) {
+ qdev_connect_gpio_out(dev, num_harts + i,
+ qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
+ }
We should have any KVM enabled check in interrupt controller emulators
instead I suggest to re-write the for-loop in sifive_plic_create() as follows:
SiFivePLICState *plic;
(....)
plic = SIFIVE_PLIC(dev);
for (i = 0; i < plic->num_addrs; i++) {
CPUState *cpu = qemu_get_cpu(plic->addr_config[i].hartid);
if (plic->addr_mode[i] == PLICMode_S) {
qdev_connect_gpio_out(dev, i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
}
if (plic->addr_mode[i] == PLICMode_M) {
qdev_connect_gpio_out(dev, num_harts + i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
}
}
}
return dev;
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index 519fa455a1..ccff662d89 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -30,6 +30,7 @@
#include "elf.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
+#include "sysemu/kvm.h"
#include <libfdt.h>
@@ -51,7 +52,9 @@ char *riscv_plic_hart_config_string(int hart_count)
CPUState *cs = qemu_get_cpu(i);
CPURISCVState *env = &RISCV_CPU(cs)->env;
- if (riscv_has_ext(env, RVS)) {
+ if (kvm_enabled()) {
+ vals[i] = "S";
+ } else if (riscv_has_ext(env, RVS)) {
vals[i] = "MS";
} else {
vals[i] = "M";
@@ -317,3 +320,14 @@ void riscv_setup_rom_reset_vec(MachineState *machine,
RISCVHartArrayState *harts
return;
}
+
+void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr)
+{
+ CPUState *cs;
+
+ for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
+ RISCVCPU *riscv_cpu = RISCV_CPU(cs);
+ riscv_cpu->env.kernel_addr = kernel_addr;
+ riscv_cpu->env.fdt_addr = fdt_addr;
+ }
+}
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 3af074148e..cc1a03f284 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -38,6 +38,7 @@
#include "chardev/char.h"
#include "sysemu/device_tree.h"
#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
#include "hw/pci/pci.h"
#include "hw/pci-host/gpex.h"
#include "hw/display/ramfb.h"
@@ -50,7 +51,11 @@ static const MemMapEntry virt_memmap[] = {
[VIRT_CLINT] = { 0x2000000, 0x10000 },
[VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 },
[VIRT_PCIE_PIO] = { 0x3000000, 0x10000 },
+#if defined(CONFIG_KVM)
+ [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 1) },
+#else
[VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) },
+#endif
Please drop this change because the same QEMU binary should be
usable with and without KVM enabled.
[VIRT_UART0] = { 0x10000000, 0x100 },
[VIRT_VIRTIO] = { 0x10001000, 0x1000 },
[VIRT_FW_CFG] = { 0x10100000, 0x18 },
@@ -372,13 +377,22 @@ static void create_fdt_socket_plic(RISCVVirtState *s,
"sifive,plic-1.0.0", "riscv,plic0"
};
- plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
+ if (kvm_enabled()) {
+ plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+ } else {
+ plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
+ }
for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
- plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
- plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
- plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
- plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
+ if (kvm_enabled()) {
+ plic_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_S_EXT);
+ } else {
+ plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
+ plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
+ plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
+ }
}
plic_phandles[socket] = (*phandle)++;
@@ -436,10 +450,12 @@ static void create_fdt_sockets(RISCVVirtState *s, const MemMapEntry
*memmap,
create_fdt_socket_memory(s, memmap, socket);
- if (s->have_aclint) {
- create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
- } else {
- create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ if (!kvm_enabled()) {
+ if (s->have_aclint) {
+ create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
+ } else {
+ create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ }
}
create_fdt_socket_plic(s, memmap, socket, phandle,
@@ -801,23 +817,25 @@ static void virt_machine_init(MachineState *machine)
hart_count, &error_abort);
sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_abort);
- /* Per-socket CLINT */
- riscv_aclint_swi_create(
- memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
- base_hartid, hart_count, false);
- riscv_aclint_mtimer_create(
- memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
- RISCV_ACLINT_SWI_SIZE,
- RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
- RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
- RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
-
- /* Per-socket ACLINT SSWI */
- if (s->have_aclint) {
+ if (!kvm_enabled()) {
+ /* Per-socket CLINT */
riscv_aclint_swi_create(
- memmap[VIRT_ACLINT_SSWI].base +
- i * memmap[VIRT_ACLINT_SSWI].size,
- base_hartid, hart_count, true);
+ memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
+ base_hartid, hart_count, false);
+ riscv_aclint_mtimer_create(
+ memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
+ RISCV_ACLINT_SWI_SIZE,
+ RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
+ RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
+ RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
+
+ /* Per-socket ACLINT SSWI */
+ if (s->have_aclint) {
+ riscv_aclint_swi_create(
+ memmap[VIRT_ACLINT_SSWI].base +
+ i * memmap[VIRT_ACLINT_SSWI].size,
+ base_hartid, hart_count, true);
+ }
}
/* Per-socket PLIC hart topology configuration string */
@@ -884,6 +902,16 @@ static void virt_machine_init(MachineState *machine)
memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base,
mask_rom);
+ /*
+ * Only direct boot kernel is currently supported for KVM VM,
+ * so the "-bios" parameter is ignored and treated like "-bios
none"
+ * when KVM is enabled.
+ */
+ if (kvm_enabled()) {
+ g_free(machine->firmware);
+ machine->firmware = g_strdup("none");
+ }
+
if (riscv_is_32bit(&s->soc[0])) {
firmware_end_addr = riscv_find_and_load_firmware(machine,
RISCV32_BIOS_BIN, start_addr, NULL);
@@ -941,6 +969,15 @@ static void virt_machine_init(MachineState *machine)
virt_memmap[VIRT_MROM].size, kernel_entry,
fdt_load_addr, machine->fdt);
+ /*
+ * Only direct boot kernel is currently supported for KVM VM,
+ * So here setup kernel start address and fdt address.
+ * TODO:Support firmware loading and integrate to TCG start
+ */
+ if (kvm_enabled()) {
+ riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
+ }
+
/* SiFive Test MMIO device */
sifive_test_create(memmap[VIRT_TEST].base);
diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
index baff11dd8a..5834c234aa 100644
--- a/include/hw/riscv/boot.h
+++ b/include/hw/riscv/boot.h
@@ -58,5 +58,6 @@ void riscv_rom_copy_firmware_info(MachineState *machine, hwaddr
rom_base,
hwaddr rom_size,
uint32_t reset_vec_size,
uint64_t kernel_entry);
+void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr);
#endif /* RISCV_BOOT_H */
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index f812998123..1c944872a3 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -29,6 +29,8 @@
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "fpu/softfloat-helpers.h"
+#include "sysemu/kvm.h"
+#include "kvm_riscv.h"
/* RISC-V CPU definitions */
@@ -380,6 +382,12 @@ static void riscv_cpu_reset(DeviceState *dev)
cs->exception_index = RISCV_EXCP_NONE;
env->load_res = -1;
set_default_nan_mode(1, &env->fp_status);
+
+#ifndef CONFIG_USER_ONLY
+ if (kvm_enabled()) {
+ kvm_riscv_reset_vcpu(cpu);
+ }
+#endif
}
static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 0760c0af93..2807eb1bcb 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -255,6 +255,9 @@ struct CPURISCVState {
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *timer; /* Internal timer */
+
+ hwaddr kernel_addr;
+ hwaddr fdt_addr;
};
OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
diff --git a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c
new file mode 100644
index 0000000000..39b96fe3f4
--- /dev/null
+++ b/target/riscv/kvm-stub.c
@@ -0,0 +1,25 @@
+/*
+ * QEMU KVM RISC-V specific function stubs
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>;.
+ */
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "kvm_riscv.h"
+
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
+{
+ abort();
+}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index e695b91dc7..db6d8a5b6e 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -37,6 +37,7 @@
#include "hw/irq.h"
#include "qemu/log.h"
#include "hw/loader.h"
+#include "kvm_riscv.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -369,6 +370,19 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
return 0;
}
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
+{
+ CPURISCVState *env = &cpu->env;
+
+ if (!kvm_enabled()) {
+ return;
+ }
+ env->pc = cpu->env.kernel_addr;
+ env->gpr[10] = kvm_arch_vcpu_id(CPU(cpu)); /* a0 */
+ env->gpr[11] = cpu->env.fdt_addr; /* a1 */
+ env->satp = 0;
+}
+
bool kvm_arch_cpu_check_are_resettable(void)
{
return true;
diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h
new file mode 100644
index 0000000000..f38c82bf59
--- /dev/null
+++ b/target/riscv/kvm_riscv.h
@@ -0,0 +1,24 @@
+/*
+ * QEMU KVM support -- RISC-V specific functions.
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>;.
+ */
+
+#ifndef QEMU_KVM_RISCV_H
+#define QEMU_KVM_RISCV_H
+
+void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
+
+#endif
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index 2faf08a941..fe41cc5805 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -19,7 +19,7 @@ riscv_ss.add(files(
'bitmanip_helper.c',
'translate.c',
))
-riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
+riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'), if_false:
files('kvm-stub.c'))
riscv_softmmu_ss = ss.source_set()
riscv_softmmu_ss.add(files(
--
2.19.1
Regards,
Anup
12:04 a.m.
New subject: [PATCH v3 06/12] target/riscv: Support start kernel directly by KVM
On Thu, Dec 23, 2021 at 11:33 AM Anup Patel <anup(a)brainfault.org> wrote:
On Mon, Dec 20, 2021 at 6:39 PM Yifei Jiang <jiangyifei(a)huawei.com> wrote:
>
> Get kernel and fdt start address in virt.c, and pass them to KVM
> when cpu reset. Add kvm_riscv.h to place riscv specific interface.
>
> In addition, PLIC is created without M-mode PLIC contexts when KVM
> is enabled.
>
> Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
> Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
> Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
> ---
> hw/intc/sifive_plic.c | 8 +++-
> hw/riscv/boot.c | 16 +++++++-
> hw/riscv/virt.c | 87 ++++++++++++++++++++++++++++------------
> include/hw/riscv/boot.h | 1 +
> target/riscv/cpu.c | 8 ++++
> target/riscv/cpu.h | 3 ++
> target/riscv/kvm-stub.c | 25 ++++++++++++
> target/riscv/kvm.c | 14 +++++++
> target/riscv/kvm_riscv.h | 24 +++++++++++
> target/riscv/meson.build | 2 +-
> 10 files changed, 159 insertions(+), 29 deletions(-)
> create mode 100644 target/riscv/kvm-stub.c
> create mode 100644 target/riscv/kvm_riscv.h
>
> diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c
> index 877e76877c..1b2b4cc25e 100644
> --- a/hw/intc/sifive_plic.c
> +++ b/hw/intc/sifive_plic.c
> @@ -30,6 +30,7 @@
> #include "target/riscv/cpu.h"
> #include "migration/vmstate.h"
> #include "hw/irq.h"
> +#include "sysemu/kvm.h"
>
> #define RISCV_DEBUG_PLIC 0
>
> @@ -555,8 +556,11 @@ DeviceState *sifive_plic_create(hwaddr addr, char
*hart_config,
>
> qdev_connect_gpio_out(dev, i,
> qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
> - qdev_connect_gpio_out(dev, num_harts + i,
> - qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
> +
> + if (!kvm_enabled()) {
> + qdev_connect_gpio_out(dev, num_harts + i,
> + qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
> + }
We should have any KVM enabled check in interrupt controller emulators
instead I suggest to re-write the for-loop in sifive_plic_create() as follows:
Typo correction:
*"We should not have any KVM enabled check in ...."
Regards,
Anup
SiFivePLICState *plic;
(....)
plic = SIFIVE_PLIC(dev);
for (i = 0; i < plic->num_addrs; i++) {
CPUState *cpu = qemu_get_cpu(plic->addr_config[i].hartid);
if (plic->addr_mode[i] == PLICMode_S) {
qdev_connect_gpio_out(dev, i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
}
if (plic->addr_mode[i] == PLICMode_M) {
qdev_connect_gpio_out(dev, num_harts + i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
}
}
> }
>
> return dev;
> diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
> index 519fa455a1..ccff662d89 100644
> --- a/hw/riscv/boot.c
> +++ b/hw/riscv/boot.c
> @@ -30,6 +30,7 @@
> #include "elf.h"
> #include "sysemu/device_tree.h"
> #include "sysemu/qtest.h"
> +#include "sysemu/kvm.h"
>
> #include <libfdt.h>
>
> @@ -51,7 +52,9 @@ char *riscv_plic_hart_config_string(int hart_count)
> CPUState *cs = qemu_get_cpu(i);
> CPURISCVState *env = &RISCV_CPU(cs)->env;
>
> - if (riscv_has_ext(env, RVS)) {
> + if (kvm_enabled()) {
> + vals[i] = "S";
> + } else if (riscv_has_ext(env, RVS)) {
> vals[i] = "MS";
> } else {
> vals[i] = "M";
> @@ -317,3 +320,14 @@ void riscv_setup_rom_reset_vec(MachineState *machine,
RISCVHartArrayState *harts
>
> return;
> }
> +
> +void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr)
> +{
> + CPUState *cs;
> +
> + for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
> + RISCVCPU *riscv_cpu = RISCV_CPU(cs);
> + riscv_cpu->env.kernel_addr = kernel_addr;
> + riscv_cpu->env.fdt_addr = fdt_addr;
> + }
> +}
> diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
> index 3af074148e..cc1a03f284 100644
> --- a/hw/riscv/virt.c
> +++ b/hw/riscv/virt.c
> @@ -38,6 +38,7 @@
> #include "chardev/char.h"
> #include "sysemu/device_tree.h"
> #include "sysemu/sysemu.h"
> +#include "sysemu/kvm.h"
> #include "hw/pci/pci.h"
> #include "hw/pci-host/gpex.h"
> #include "hw/display/ramfb.h"
> @@ -50,7 +51,11 @@ static const MemMapEntry virt_memmap[] = {
> [VIRT_CLINT] = { 0x2000000, 0x10000 },
> [VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 },
> [VIRT_PCIE_PIO] = { 0x3000000, 0x10000 },
> +#if defined(CONFIG_KVM)
> + [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 1) },
> +#else
> [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) },
> +#endif
Please drop this change because the same QEMU binary should be
usable with and without KVM enabled.
> [VIRT_UART0] = { 0x10000000, 0x100 },
> [VIRT_VIRTIO] = { 0x10001000, 0x1000 },
> [VIRT_FW_CFG] = { 0x10100000, 0x18 },
> @@ -372,13 +377,22 @@ static void create_fdt_socket_plic(RISCVVirtState *s,
> "sifive,plic-1.0.0", "riscv,plic0"
> };
>
> - plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
> + if (kvm_enabled()) {
> + plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
> + } else {
> + plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
> + }
>
> for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
> - plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
> - plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
> - plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
> - plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
> + if (kvm_enabled()) {
> + plic_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
> + plic_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_S_EXT);
> + } else {
> + plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
> + plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
> + plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
> + plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
> + }
> }
>
> plic_phandles[socket] = (*phandle)++;
> @@ -436,10 +450,12 @@ static void create_fdt_sockets(RISCVVirtState *s, const
MemMapEntry *memmap,
>
> create_fdt_socket_memory(s, memmap, socket);
>
> - if (s->have_aclint) {
> - create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
> - } else {
> - create_fdt_socket_clint(s, memmap, socket, intc_phandles);
> + if (!kvm_enabled()) {
> + if (s->have_aclint) {
> + create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
> + } else {
> + create_fdt_socket_clint(s, memmap, socket, intc_phandles);
> + }
> }
>
> create_fdt_socket_plic(s, memmap, socket, phandle,
> @@ -801,23 +817,25 @@ static void virt_machine_init(MachineState *machine)
> hart_count, &error_abort);
> sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_abort);
>
> - /* Per-socket CLINT */
> - riscv_aclint_swi_create(
> - memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
> - base_hartid, hart_count, false);
> - riscv_aclint_mtimer_create(
> - memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
> - RISCV_ACLINT_SWI_SIZE,
> - RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
> - RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
> - RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
> -
> - /* Per-socket ACLINT SSWI */
> - if (s->have_aclint) {
> + if (!kvm_enabled()) {
> + /* Per-socket CLINT */
> riscv_aclint_swi_create(
> - memmap[VIRT_ACLINT_SSWI].base +
> - i * memmap[VIRT_ACLINT_SSWI].size,
> - base_hartid, hart_count, true);
> + memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size,
> + base_hartid, hart_count, false);
> + riscv_aclint_mtimer_create(
> + memmap[VIRT_CLINT].base + i * memmap[VIRT_CLINT].size +
> + RISCV_ACLINT_SWI_SIZE,
> + RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid, hart_count,
> + RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
> + RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
> +
> + /* Per-socket ACLINT SSWI */
> + if (s->have_aclint) {
> + riscv_aclint_swi_create(
> + memmap[VIRT_ACLINT_SSWI].base +
> + i * memmap[VIRT_ACLINT_SSWI].size,
> + base_hartid, hart_count, true);
> + }
> }
>
> /* Per-socket PLIC hart topology configuration string */
> @@ -884,6 +902,16 @@ static void virt_machine_init(MachineState *machine)
> memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base,
> mask_rom);
>
> + /*
> + * Only direct boot kernel is currently supported for KVM VM,
> + * so the "-bios" parameter is ignored and treated like "-bios
none"
> + * when KVM is enabled.
> + */
> + if (kvm_enabled()) {
> + g_free(machine->firmware);
> + machine->firmware = g_strdup("none");
> + }
> +
> if (riscv_is_32bit(&s->soc[0])) {
> firmware_end_addr = riscv_find_and_load_firmware(machine,
> RISCV32_BIOS_BIN, start_addr, NULL);
> @@ -941,6 +969,15 @@ static void virt_machine_init(MachineState *machine)
> virt_memmap[VIRT_MROM].size, kernel_entry,
> fdt_load_addr, machine->fdt);
>
> + /*
> + * Only direct boot kernel is currently supported for KVM VM,
> + * So here setup kernel start address and fdt address.
> + * TODO:Support firmware loading and integrate to TCG start
> + */
> + if (kvm_enabled()) {
> + riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
> + }
> +
> /* SiFive Test MMIO device */
> sifive_test_create(memmap[VIRT_TEST].base);
>
> diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
> index baff11dd8a..5834c234aa 100644
> --- a/include/hw/riscv/boot.h
> +++ b/include/hw/riscv/boot.h
> @@ -58,5 +58,6 @@ void riscv_rom_copy_firmware_info(MachineState *machine, hwaddr
rom_base,
> hwaddr rom_size,
> uint32_t reset_vec_size,
> uint64_t kernel_entry);
> +void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr);
>
> #endif /* RISCV_BOOT_H */
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index f812998123..1c944872a3 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -29,6 +29,8 @@
> #include "hw/qdev-properties.h"
> #include "migration/vmstate.h"
> #include "fpu/softfloat-helpers.h"
> +#include "sysemu/kvm.h"
> +#include "kvm_riscv.h"
>
> /* RISC-V CPU definitions */
>
> @@ -380,6 +382,12 @@ static void riscv_cpu_reset(DeviceState *dev)
> cs->exception_index = RISCV_EXCP_NONE;
> env->load_res = -1;
> set_default_nan_mode(1, &env->fp_status);
> +
> +#ifndef CONFIG_USER_ONLY
> + if (kvm_enabled()) {
> + kvm_riscv_reset_vcpu(cpu);
> + }
> +#endif
> }
>
> static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info)
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 0760c0af93..2807eb1bcb 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -255,6 +255,9 @@ struct CPURISCVState {
>
> /* Fields from here on are preserved across CPU reset. */
> QEMUTimer *timer; /* Internal timer */
> +
> + hwaddr kernel_addr;
> + hwaddr fdt_addr;
> };
>
> OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
> diff --git a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c
> new file mode 100644
> index 0000000000..39b96fe3f4
> --- /dev/null
> +++ b/target/riscv/kvm-stub.c
> @@ -0,0 +1,25 @@
> +/*
> + * QEMU KVM RISC-V specific function stubs
> + *
> + * Copyright (c) 2020 Huawei Technologies Co., Ltd
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2 or later, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program. If not, see <http://www.gnu.org/licenses/>;.
> + */
> +#include "qemu/osdep.h"
> +#include "cpu.h"
> +#include "kvm_riscv.h"
> +
> +void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
> +{
> + abort();
> +}
> diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
> index e695b91dc7..db6d8a5b6e 100644
> --- a/target/riscv/kvm.c
> +++ b/target/riscv/kvm.c
> @@ -37,6 +37,7 @@
> #include "hw/irq.h"
> #include "qemu/log.h"
> #include "hw/loader.h"
> +#include "kvm_riscv.h"
>
> static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
> {
> @@ -369,6 +370,19 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
> return 0;
> }
>
> +void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
> +{
> + CPURISCVState *env = &cpu->env;
> +
> + if (!kvm_enabled()) {
> + return;
> + }
> + env->pc = cpu->env.kernel_addr;
> + env->gpr[10] = kvm_arch_vcpu_id(CPU(cpu)); /* a0 */
> + env->gpr[11] = cpu->env.fdt_addr; /* a1 */
> + env->satp = 0;
> +}
> +
> bool kvm_arch_cpu_check_are_resettable(void)
> {
> return true;
> diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h
> new file mode 100644
> index 0000000000..f38c82bf59
> --- /dev/null
> +++ b/target/riscv/kvm_riscv.h
> @@ -0,0 +1,24 @@
> +/*
> + * QEMU KVM support -- RISC-V specific functions.
> + *
> + * Copyright (c) 2020 Huawei Technologies Co., Ltd
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2 or later, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program. If not, see <http://www.gnu.org/licenses/>;.
> + */
> +
> +#ifndef QEMU_KVM_RISCV_H
> +#define QEMU_KVM_RISCV_H
> +
> +void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
> +
> +#endif
> diff --git a/target/riscv/meson.build b/target/riscv/meson.build
> index 2faf08a941..fe41cc5805 100644
> --- a/target/riscv/meson.build
> +++ b/target/riscv/meson.build
> @@ -19,7 +19,7 @@ riscv_ss.add(files(
> 'bitmanip_helper.c',
> 'translate.c',
> ))
> -riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
> +riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'), if_false:
files('kvm-stub.c'))
>
> riscv_softmmu_ss = ss.source_set()
> riscv_softmmu_ss.add(files(
> --
> 2.19.1
>
Regards,
Anup
7:28 p.m.
New subject: [PATCH v3 06/12] target/riscv: Support start kernel directly by KVM
-----Original Message-----
From: Anup Patel [mailto:anup@brainfault.org]
Sent: Thursday, December 23, 2021 2:04 PM
To: Jiangyifei <jiangyifei(a)huawei.com>
Cc: QEMU Developers <qemu-devel(a)nongnu.org>; open list:RISC-V
<qemu-riscv(a)nongnu.org>; kvm-riscv(a)lists.infradead.org; KVM General
<kvm(a)vger.kernel.org>; libvir-list(a)redhat.com; Anup Patel
<anup.patel(a)wdc.com>; Palmer Dabbelt <palmer(a)dabbelt.com>; Alistair
Francis <Alistair.Francis(a)wdc.com>; Bin Meng <bin.meng(a)windriver.com>;
Fanliang (EulerOS) <fanliang(a)huawei.com>; Wubin (H)
<wu.wubin(a)huawei.com>; Wanghaibin (D) <wanghaibin.wang(a)huawei.com>;
wanbo (G) <wanbo13(a)huawei.com>; limingwang (A)
<limingwang(a)huawei.com>
Subject: Re: [PATCH v3 06/12] target/riscv: Support start kernel directly by KVM
On Thu, Dec 23, 2021 at 11:33 AM Anup Patel <anup(a)brainfault.org> wrote:
>
> On Mon, Dec 20, 2021 at 6:39 PM Yifei Jiang <jiangyifei(a)huawei.com>
wrote:
> >
> > Get kernel and fdt start address in virt.c, and pass them to KVM
> > when cpu reset. Add kvm_riscv.h to place riscv specific interface.
> >
> > In addition, PLIC is created without M-mode PLIC contexts when KVM
> > is enabled.
> >
> > Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
> > Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
> > Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
> > ---
> > hw/intc/sifive_plic.c | 8 +++-
> > hw/riscv/boot.c | 16 +++++++-
> > hw/riscv/virt.c | 87
++++++++++++++++++++++++++++------------
> > include/hw/riscv/boot.h | 1 +
> > target/riscv/cpu.c | 8 ++++
> > target/riscv/cpu.h | 3 ++
> > target/riscv/kvm-stub.c | 25 ++++++++++++
> > target/riscv/kvm.c | 14 +++++++
> > target/riscv/kvm_riscv.h | 24 +++++++++++ target/riscv/meson.build
> > | 2 +-
> > 10 files changed, 159 insertions(+), 29 deletions(-) create mode
> > 100644 target/riscv/kvm-stub.c create mode 100644
> > target/riscv/kvm_riscv.h
> >
> > diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c index
> > 877e76877c..1b2b4cc25e 100644
> > --- a/hw/intc/sifive_plic.c
> > +++ b/hw/intc/sifive_plic.c
> > @@ -30,6 +30,7 @@
> > #include "target/riscv/cpu.h"
> > #include "migration/vmstate.h"
> > #include "hw/irq.h"
> > +#include "sysemu/kvm.h"
> >
> > #define RISCV_DEBUG_PLIC 0
> >
> > @@ -555,8 +556,11 @@ DeviceState *sifive_plic_create(hwaddr addr,
> > char *hart_config,
> >
> > qdev_connect_gpio_out(dev, i,
> > qdev_get_gpio_in(DEVICE(cpu),
IRQ_S_EXT));
> > - qdev_connect_gpio_out(dev, num_harts + i,
> > - qdev_get_gpio_in(DEVICE(cpu),
IRQ_M_EXT));
> > +
> > + if (!kvm_enabled()) {
> > + qdev_connect_gpio_out(dev, num_harts + i,
> > + qdev_get_gpio_in(DEVICE(cpu),
IRQ_M_EXT));
> > + }
>
> We should have any KVM enabled check in interrupt controller emulators
> instead I suggest to re-write the for-loop in sifive_plic_create() as follows:
Typo correction:
*"We should not have any KVM enabled check in ...."
Regards,
Anup
>
> SiFivePLICState *plic;
>
> (....)
>
> plic = SIFIVE_PLIC(dev);
> for (i = 0; i < plic->num_addrs; i++) {
> CPUState *cpu = qemu_get_cpu(plic->addr_config[i].hartid);
>
> if (plic->addr_mode[i] == PLICMode_S) {
> qdev_connect_gpio_out(dev, i,
> qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT));
> }
> if (plic->addr_mode[i] == PLICMode_M) {
> qdev_connect_gpio_out(dev, num_harts + i,
> qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
> }
> }
>
Yes, this looks better. It will be re-write in the next series as suggested.
> > }
> >
> > return dev;
> > diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c index
> > 519fa455a1..ccff662d89 100644
> > --- a/hw/riscv/boot.c
> > +++ b/hw/riscv/boot.c
> > @@ -30,6 +30,7 @@
> > #include "elf.h"
> > #include "sysemu/device_tree.h"
> > #include "sysemu/qtest.h"
> > +#include "sysemu/kvm.h"
> >
> > #include <libfdt.h>
> >
> > @@ -51,7 +52,9 @@ char *riscv_plic_hart_config_string(int hart_count)
> > CPUState *cs = qemu_get_cpu(i);
> > CPURISCVState *env = &RISCV_CPU(cs)->env;
> >
> > - if (riscv_has_ext(env, RVS)) {
> > + if (kvm_enabled()) {
> > + vals[i] = "S";
> > + } else if (riscv_has_ext(env, RVS)) {
> > vals[i] = "MS";
> > } else {
> > vals[i] = "M";
> > @@ -317,3 +320,14 @@ void riscv_setup_rom_reset_vec(MachineState
> > *machine, RISCVHartArrayState *harts
> >
> > return;
> > }
> > +
> > +void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr)
> > +{
> > + CPUState *cs;
> > +
> > + for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
> > + RISCVCPU *riscv_cpu = RISCV_CPU(cs);
> > + riscv_cpu->env.kernel_addr = kernel_addr;
> > + riscv_cpu->env.fdt_addr = fdt_addr;
> > + }
> > +}
> > diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index
> > 3af074148e..cc1a03f284 100644
> > --- a/hw/riscv/virt.c
> > +++ b/hw/riscv/virt.c
> > @@ -38,6 +38,7 @@
> > #include "chardev/char.h"
> > #include "sysemu/device_tree.h"
> > #include "sysemu/sysemu.h"
> > +#include "sysemu/kvm.h"
> > #include "hw/pci/pci.h"
> > #include "hw/pci-host/gpex.h"
> > #include "hw/display/ramfb.h"
> > @@ -50,7 +51,11 @@ static const MemMapEntry virt_memmap[] = {
> > [VIRT_CLINT] = { 0x2000000, 0x10000 },
> > [VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 },
> > [VIRT_PCIE_PIO] = { 0x3000000, 0x10000 },
> > +#if defined(CONFIG_KVM)
> > + [VIRT_PLIC] = { 0xc000000,
VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 1) },
> > +#else
> > [VIRT_PLIC] = { 0xc000000,
VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) },
> > +#endif
>
> Please drop this change because the same QEMU binary should be usable
> with and without KVM enabled.
>
It will be dropped in the next series.
Yifei
> > [VIRT_UART0] = { 0x10000000, 0x100 },
> > [VIRT_VIRTIO] = { 0x10001000, 0x1000 },
> > [VIRT_FW_CFG] = { 0x10100000, 0x18 },
> > @@ -372,13 +377,22 @@ static void
create_fdt_socket_plic(RISCVVirtState *s,
> > "sifive,plic-1.0.0", "riscv,plic0"
> > };
> >
> > - plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
> > + if (kvm_enabled()) {
> > + plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
> > + } else {
> > + plic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 4);
> > + }
> >
> > for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
> > - plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
> > - plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
> > - plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
> > - plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
> > + if (kvm_enabled()) {
> > + plic_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
> > + plic_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_S_EXT);
> > + } else {
> > + plic_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandles[cpu]);
> > + plic_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
> > + plic_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandles[cpu]);
> > + plic_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
> > + }
> > }
> >
> > plic_phandles[socket] = (*phandle)++; @@ -436,10 +450,12 @@
> > static void create_fdt_sockets(RISCVVirtState *s, const MemMapEntry
> > *memmap,
> >
> > create_fdt_socket_memory(s, memmap, socket);
> >
> > - if (s->have_aclint) {
> > - create_fdt_socket_aclint(s, memmap, socket,
intc_phandles);
> > - } else {
> > - create_fdt_socket_clint(s, memmap, socket,
intc_phandles);
> > + if (!kvm_enabled()) {
> > + if (s->have_aclint) {
> > + create_fdt_socket_aclint(s, memmap, socket,
intc_phandles);
> > + } else {
> > + create_fdt_socket_clint(s, memmap, socket,
intc_phandles);
> > + }
> > }
> >
> > create_fdt_socket_plic(s, memmap, socket, phandle, @@
> > -801,23 +817,25 @@ static void virt_machine_init(MachineState *machine)
> > hart_count, &error_abort);
> > sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_abort);
> >
> > - /* Per-socket CLINT */
> > - riscv_aclint_swi_create(
> > - memmap[VIRT_CLINT].base + i *
memmap[VIRT_CLINT].size,
> > - base_hartid, hart_count, false);
> > - riscv_aclint_mtimer_create(
> > - memmap[VIRT_CLINT].base + i *
memmap[VIRT_CLINT].size +
> > - RISCV_ACLINT_SWI_SIZE,
> > - RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid,
hart_count,
> > - RISCV_ACLINT_DEFAULT_MTIMECMP,
RISCV_ACLINT_DEFAULT_MTIME,
> > - RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
> > -
> > - /* Per-socket ACLINT SSWI */
> > - if (s->have_aclint) {
> > + if (!kvm_enabled()) {
> > + /* Per-socket CLINT */
> > riscv_aclint_swi_create(
> > - memmap[VIRT_ACLINT_SSWI].base +
> > - i * memmap[VIRT_ACLINT_SSWI].size,
> > - base_hartid, hart_count, true);
> > + memmap[VIRT_CLINT].base + i *
memmap[VIRT_CLINT].size,
> > + base_hartid, hart_count, false);
> > + riscv_aclint_mtimer_create(
> > + memmap[VIRT_CLINT].base + i *
memmap[VIRT_CLINT].size +
> > + RISCV_ACLINT_SWI_SIZE,
> > + RISCV_ACLINT_DEFAULT_MTIMER_SIZE, base_hartid,
hart_count,
> > + RISCV_ACLINT_DEFAULT_MTIMECMP,
RISCV_ACLINT_DEFAULT_MTIME,
> > + RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
> > +
> > + /* Per-socket ACLINT SSWI */
> > + if (s->have_aclint) {
> > + riscv_aclint_swi_create(
> > + memmap[VIRT_ACLINT_SSWI].base +
> > + i * memmap[VIRT_ACLINT_SSWI].size,
> > + base_hartid, hart_count, true);
> > + }
> > }
> >
> > /* Per-socket PLIC hart topology configuration string */ @@
> > -884,6 +902,16 @@ static void virt_machine_init(MachineState *machine)
> > memory_region_add_subregion(system_memory,
memmap[VIRT_MROM].base,
> > mask_rom);
> >
> > + /*
> > + * Only direct boot kernel is currently supported for KVM VM,
> > + * so the "-bios" parameter is ignored and treated like
"-bios none"
> > + * when KVM is enabled.
> > + */
> > + if (kvm_enabled()) {
> > + g_free(machine->firmware);
> > + machine->firmware = g_strdup("none");
> > + }
> > +
> > if (riscv_is_32bit(&s->soc[0])) {
> > firmware_end_addr = riscv_find_and_load_firmware(machine,
> > RISCV32_BIOS_BIN,
start_addr,
> > NULL); @@ -941,6 +969,15 @@ static void
virt_machine_init(MachineState *machine)
> > virt_memmap[VIRT_MROM].size,
kernel_entry,
> > fdt_load_addr, machine->fdt);
> >
> > + /*
> > + * Only direct boot kernel is currently supported for KVM VM,
> > + * So here setup kernel start address and fdt address.
> > + * TODO:Support firmware loading and integrate to TCG start
> > + */
> > + if (kvm_enabled()) {
> > + riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
> > + }
> > +
> > /* SiFive Test MMIO device */
> > sifive_test_create(memmap[VIRT_TEST].base);
> >
> > diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h index
> > baff11dd8a..5834c234aa 100644
> > --- a/include/hw/riscv/boot.h
> > +++ b/include/hw/riscv/boot.h
> > @@ -58,5 +58,6 @@ void riscv_rom_copy_firmware_info(MachineState
*machine, hwaddr rom_base,
> > hwaddr rom_size,
> > uint32_t reset_vec_size,
> > uint64_t kernel_entry);
> > +void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr
> > +fdt_addr);
> >
> > #endif /* RISCV_BOOT_H */
> > diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index
> > f812998123..1c944872a3 100644
> > --- a/target/riscv/cpu.c
> > +++ b/target/riscv/cpu.c
> > @@ -29,6 +29,8 @@
> > #include "hw/qdev-properties.h"
> > #include "migration/vmstate.h"
> > #include "fpu/softfloat-helpers.h"
> > +#include "sysemu/kvm.h"
> > +#include "kvm_riscv.h"
> >
> > /* RISC-V CPU definitions */
> >
> > @@ -380,6 +382,12 @@ static void riscv_cpu_reset(DeviceState *dev)
> > cs->exception_index = RISCV_EXCP_NONE;
> > env->load_res = -1;
> > set_default_nan_mode(1, &env->fp_status);
> > +
> > +#ifndef CONFIG_USER_ONLY
> > + if (kvm_enabled()) {
> > + kvm_riscv_reset_vcpu(cpu);
> > + }
> > +#endif
> > }
> >
> > static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info
> > *info) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index
> > 0760c0af93..2807eb1bcb 100644
> > --- a/target/riscv/cpu.h
> > +++ b/target/riscv/cpu.h
> > @@ -255,6 +255,9 @@ struct CPURISCVState {
> >
> > /* Fields from here on are preserved across CPU reset. */
> > QEMUTimer *timer; /* Internal timer */
> > +
> > + hwaddr kernel_addr;
> > + hwaddr fdt_addr;
> > };
> >
> > OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass, diff --git
> > a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c new file mode
> > 100644 index 0000000000..39b96fe3f4
> > --- /dev/null
> > +++ b/target/riscv/kvm-stub.c
> > @@ -0,0 +1,25 @@
> > +/*
> > + * QEMU KVM RISC-V specific function stubs
> > + *
> > + * Copyright (c) 2020 Huawei Technologies Co., Ltd
> > + *
> > + * This program is free software; you can redistribute it and/or
> > +modify it
> > + * under the terms and conditions of the GNU General Public
> > +License,
> > + * version 2 or later, as published by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope it will be useful, but
> > +WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of
> > +MERCHANTABILITY or
> > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> > +License for
> > + * more details.
> > + *
> > + * You should have received a copy of the GNU General Public
> > +License along with
> > + * this program. If not, see <http://www.gnu.org/licenses/>;.
> > + */
> > +#include "qemu/osdep.h"
> > +#include "cpu.h"
> > +#include "kvm_riscv.h"
> > +
> > +void kvm_riscv_reset_vcpu(RISCVCPU *cpu) {
> > + abort();
> > +}
> > diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index
> > e695b91dc7..db6d8a5b6e 100644
> > --- a/target/riscv/kvm.c
> > +++ b/target/riscv/kvm.c
> > @@ -37,6 +37,7 @@
> > #include "hw/irq.h"
> > #include "qemu/log.h"
> > #include "hw/loader.h"
> > +#include "kvm_riscv.h"
> >
> > static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
> > uint64_t idx) { @@ -369,6 +370,19 @@ int
> > kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
> > return 0;
> > }
> >
> > +void kvm_riscv_reset_vcpu(RISCVCPU *cpu) {
> > + CPURISCVState *env = &cpu->env;
> > +
> > + if (!kvm_enabled()) {
> > + return;
> > + }
> > + env->pc = cpu->env.kernel_addr;
> > + env->gpr[10] = kvm_arch_vcpu_id(CPU(cpu)); /* a0 */
> > + env->gpr[11] = cpu->env.fdt_addr; /* a1 */
> > + env->satp = 0;
> > +}
> > +
> > bool kvm_arch_cpu_check_are_resettable(void)
> > {
> > return true;
> > diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h new
> > file mode 100644 index 0000000000..f38c82bf59
> > --- /dev/null
> > +++ b/target/riscv/kvm_riscv.h
> > @@ -0,0 +1,24 @@
> > +/*
> > + * QEMU KVM support -- RISC-V specific functions.
> > + *
> > + * Copyright (c) 2020 Huawei Technologies Co., Ltd
> > + *
> > + * This program is free software; you can redistribute it and/or
> > +modify it
> > + * under the terms and conditions of the GNU General Public
> > +License,
> > + * version 2 or later, as published by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope it will be useful, but
> > +WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of
> > +MERCHANTABILITY or
> > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
> > +License for
> > + * more details.
> > + *
> > + * You should have received a copy of the GNU General Public
> > +License along with
> > + * this program. If not, see <http://www.gnu.org/licenses/>;.
> > + */
> > +
> > +#ifndef QEMU_KVM_RISCV_H
> > +#define QEMU_KVM_RISCV_H
> > +
> > +void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
> > +
> > +#endif
> > diff --git a/target/riscv/meson.build b/target/riscv/meson.build
> > index 2faf08a941..fe41cc5805 100644
> > --- a/target/riscv/meson.build
> > +++ b/target/riscv/meson.build
> > @@ -19,7 +19,7 @@ riscv_ss.add(files(
> > 'bitmanip_helper.c',
> > 'translate.c',
> > ))
> > -riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'))
> > +riscv_ss.add(when: 'CONFIG_KVM', if_true: files('kvm.c'),
if_false:
> > +files('kvm-stub.c'))
> >
> > riscv_softmmu_ss = ss.source_set()
> > riscv_softmmu_ss.add(files(
> > --
> > 2.19.1
> >
>
> Regards,
> Anup
7:09 a.m.
New subject: [PATCH v3 07/12] target/riscv: Support setting external interrupt by KVM
When KVM is enabled, set the S-mode external interrupt through
kvm_riscv_set_irq function.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
---
target/riscv/cpu.c | 6 +++++-
target/riscv/kvm-stub.c | 5 +++++
target/riscv/kvm.c | 17 +++++++++++++++++
target/riscv/kvm_riscv.h | 1 +
4 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 1c944872a3..3fc3a9c45b 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -603,7 +603,11 @@ static void riscv_cpu_set_irq(void *opaque, int irq, int level)
case IRQ_S_EXT:
case IRQ_VS_EXT:
case IRQ_M_EXT:
- riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level));
+ if (kvm_enabled()) {
+ kvm_riscv_set_irq(cpu, irq, level);
+ } else {
+ riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level));
+ }
break;
default:
g_assert_not_reached();
diff --git a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c
index 39b96fe3f4..4e8fc31a21 100644
--- a/target/riscv/kvm-stub.c
+++ b/target/riscv/kvm-stub.c
@@ -23,3 +23,8 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
{
abort();
}
+
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level)
+{
+ abort();
+}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index db6d8a5b6e..0027f11f45 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -383,6 +383,23 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
env->satp = 0;
}
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level)
+{
+ int ret;
+ unsigned virq = level ? KVM_INTERRUPT_SET : KVM_INTERRUPT_UNSET;
+
+ if (irq != IRQ_S_EXT) {
+ perror("kvm riscv set irq != IRQ_S_EXT\n");
+ abort();
+ }
+
+ ret = kvm_vcpu_ioctl(CPU(cpu), KVM_INTERRUPT, &virq);
+ if (ret < 0) {
+ perror("Set irq failed");
+ abort();
+ }
+}
+
bool kvm_arch_cpu_check_are_resettable(void)
{
return true;
diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h
index f38c82bf59..ed281bdce0 100644
--- a/target/riscv/kvm_riscv.h
+++ b/target/riscv/kvm_riscv.h
@@ -20,5 +20,6 @@
#define QEMU_KVM_RISCV_H
void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level);
#endif
--
2.19.1
12:05 a.m.
New subject: [PATCH v3 07/12] target/riscv: Support setting external interrupt by KVM
On Mon, Dec 20, 2021 at 6:39 PM Yifei Jiang <jiangyifei(a)huawei.com> wrote:
When KVM is enabled, set the S-mode external interrupt through
kvm_riscv_set_irq function.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Looks good to me.
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
Regards,
Anup
---
target/riscv/cpu.c | 6 +++++-
target/riscv/kvm-stub.c | 5 +++++
target/riscv/kvm.c | 17 +++++++++++++++++
target/riscv/kvm_riscv.h | 1 +
4 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 1c944872a3..3fc3a9c45b 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -603,7 +603,11 @@ static void riscv_cpu_set_irq(void *opaque, int irq, int level)
case IRQ_S_EXT:
case IRQ_VS_EXT:
case IRQ_M_EXT:
- riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level));
+ if (kvm_enabled()) {
+ kvm_riscv_set_irq(cpu, irq, level);
+ } else {
+ riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level));
+ }
break;
default:
g_assert_not_reached();
diff --git a/target/riscv/kvm-stub.c b/target/riscv/kvm-stub.c
index 39b96fe3f4..4e8fc31a21 100644
--- a/target/riscv/kvm-stub.c
+++ b/target/riscv/kvm-stub.c
@@ -23,3 +23,8 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
{
abort();
}
+
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level)
+{
+ abort();
+}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index db6d8a5b6e..0027f11f45 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -383,6 +383,23 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
env->satp = 0;
}
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level)
+{
+ int ret;
+ unsigned virq = level ? KVM_INTERRUPT_SET : KVM_INTERRUPT_UNSET;
+
+ if (irq != IRQ_S_EXT) {
+ perror("kvm riscv set irq != IRQ_S_EXT\n");
+ abort();
+ }
+
+ ret = kvm_vcpu_ioctl(CPU(cpu), KVM_INTERRUPT, &virq);
+ if (ret < 0) {
+ perror("Set irq failed");
+ abort();
+ }
+}
+
bool kvm_arch_cpu_check_are_resettable(void)
{
return true;
diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h
index f38c82bf59..ed281bdce0 100644
--- a/target/riscv/kvm_riscv.h
+++ b/target/riscv/kvm_riscv.h
@@ -20,5 +20,6 @@
#define QEMU_KVM_RISCV_H
void kvm_riscv_reset_vcpu(RISCVCPU *cpu);
+void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level);
#endif
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit
Use char-fe to handle console sbi call, which implement early
console io while apply 'earlycon=sbi' into kernel parameters.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 43 +++++++++++++++++-
target/riscv/sbi_ecall_interface.h | 72 ++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+), 1 deletion(-)
create mode 100644 target/riscv/sbi_ecall_interface.h
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 0027f11f45..4d08669c81 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,9 @@
#include "qemu/log.h"
#include "hw/loader.h"
#include "kvm_riscv.h"
+#include "sbi_ecall_interface.h"
+#include "chardev/char-fe.h"
+#include "semihosting/console.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -365,9 +368,47 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
return true;
}
+static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
+{
+ int ret = 0;
+ unsigned char ch;
+ switch (run->riscv_sbi.extension_id) {
+ case SBI_EXT_0_1_CONSOLE_PUTCHAR:
+ ch = run->riscv_sbi.args[0];
+ qemu_semihosting_log_out((const char *)&ch, sizeof(ch));
+ break;
+ case SBI_EXT_0_1_CONSOLE_GETCHAR:
+ ret = qemu_chr_fe_read_all(serial_hd(0)->be, &ch, sizeof(ch));
+ if (ret == sizeof(ch)) {
+ run->riscv_sbi.args[0] = ch;
+ } else {
+ run->riscv_sbi.args[0] = -1;
+ }
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: un-handled SBI EXIT, specific reasons is %lu\n",
+ __func__, run->riscv_sbi.extension_id);
+ ret = -1;
+ break;
+ }
+ return ret;
+}
+
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
{
- return 0;
+ int ret = 0;
+ switch (run->exit_reason) {
+ case KVM_EXIT_RISCV_SBI:
+ ret = kvm_riscv_handle_sbi(cs, run);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
+ __func__, run->exit_reason);
+ ret = -1;
+ break;
+ }
+ return ret;
}
void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
diff --git a/target/riscv/sbi_ecall_interface.h b/target/riscv/sbi_ecall_interface.h
new file mode 100644
index 0000000000..fb1a3fa8f2
--- /dev/null
+++ b/target/riscv/sbi_ecall_interface.h
@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.patel(a)wdc.com>
+ */
+
+#ifndef __SBI_ECALL_INTERFACE_H__
+#define __SBI_ECALL_INTERFACE_H__
+
+/* clang-format off */
+
+/* SBI Extension IDs */
+#define SBI_EXT_0_1_SET_TIMER 0x0
+#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
+#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
+#define SBI_EXT_0_1_CLEAR_IPI 0x3
+#define SBI_EXT_0_1_SEND_IPI 0x4
+#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
+#define SBI_EXT_0_1_SHUTDOWN 0x8
+#define SBI_EXT_BASE 0x10
+#define SBI_EXT_TIME 0x54494D45
+#define SBI_EXT_IPI 0x735049
+#define SBI_EXT_RFENCE 0x52464E43
+#define SBI_EXT_HSM 0x48534D
+
+/* SBI function IDs for BASE extension*/
+#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
+#define SBI_EXT_BASE_GET_IMP_ID 0x1
+#define SBI_EXT_BASE_GET_IMP_VERSION 0x2
+#define SBI_EXT_BASE_PROBE_EXT 0x3
+#define SBI_EXT_BASE_GET_MVENDORID 0x4
+#define SBI_EXT_BASE_GET_MARCHID 0x5
+#define SBI_EXT_BASE_GET_MIMPID 0x6
+
+/* SBI function IDs for TIME extension*/
+#define SBI_EXT_TIME_SET_TIMER 0x0
+
+/* SBI function IDs for IPI extension*/
+#define SBI_EXT_IPI_SEND_IPI 0x0
+
+/* SBI function IDs for RFENCE extension*/
+#define SBI_EXT_RFENCE_REMOTE_FENCE_I 0x0
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA 0x1
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID 0x2
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA 0x3
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID 0x4
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA 0x5
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID 0x6
+
+/* SBI function IDs for HSM extension */
+#define SBI_EXT_HSM_HART_START 0x0
+#define SBI_EXT_HSM_HART_STOP 0x1
+#define SBI_EXT_HSM_HART_GET_STATUS 0x2
+
+#define SBI_HSM_HART_STATUS_STARTED 0x0
+#define SBI_HSM_HART_STATUS_STOPPED 0x1
+#define SBI_HSM_HART_STATUS_START_PENDING 0x2
+#define SBI_HSM_HART_STATUS_STOP_PENDING 0x3
+
+#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
+#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
+#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
+#define SBI_EXT_VENDOR_START 0x09000000
+#define SBI_EXT_VENDOR_END 0x09FFFFFF
+/* clang-format on */
+
+#endif
--
2.19.1
4:03 p.m.
New subject: [PATCH v3 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit
On Tue, Dec 21, 2021 at 3:41 AM Yifei Jiang via <qemu-devel(a)nongnu.org> wrote:
Use char-fe to handle console sbi call, which implement early
console io while apply 'earlycon=sbi' into kernel parameters.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 43 +++++++++++++++++-
target/riscv/sbi_ecall_interface.h | 72 ++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+), 1 deletion(-)
create mode 100644 target/riscv/sbi_ecall_interface.h
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 0027f11f45..4d08669c81 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,9 @@
#include "qemu/log.h"
#include "hw/loader.h"
#include "kvm_riscv.h"
+#include "sbi_ecall_interface.h"
+#include "chardev/char-fe.h"
+#include "semihosting/console.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -365,9 +368,47 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
return true;
}
+static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run)
+{
+ int ret = 0;
+ unsigned char ch;
+ switch (run->riscv_sbi.extension_id) {
+ case SBI_EXT_0_1_CONSOLE_PUTCHAR:
+ ch = run->riscv_sbi.args[0];
+ qemu_semihosting_log_out((const char *)&ch, sizeof(ch));
Hmmm... We print to the semihosting
+ break;
+ case SBI_EXT_0_1_CONSOLE_GETCHAR:
+ ret = qemu_chr_fe_read_all(serial_hd(0)->be, &ch, sizeof(ch));
but then read from the first serial device.
That seems a little strange. Would it be better to just print to serial as well?
Alistair
+ if (ret == sizeof(ch)) {
+ run->riscv_sbi.args[0] = ch;
+ } else {
+ run->riscv_sbi.args[0] = -1;
+ }
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: un-handled SBI EXIT, specific reasons is %lu\n",
+ __func__, run->riscv_sbi.extension_id);
+ ret = -1;
+ break;
+ }
+ return ret;
+}
+
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
{
- return 0;
+ int ret = 0;
+ switch (run->exit_reason) {
+ case KVM_EXIT_RISCV_SBI:
+ ret = kvm_riscv_handle_sbi(cs, run);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
+ __func__, run->exit_reason);
+ ret = -1;
+ break;
+ }
+ return ret;
}
void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
diff --git a/target/riscv/sbi_ecall_interface.h b/target/riscv/sbi_ecall_interface.h
new file mode 100644
index 0000000000..fb1a3fa8f2
--- /dev/null
+++ b/target/riscv/sbi_ecall_interface.h
@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.patel(a)wdc.com>
+ */
+
+#ifndef __SBI_ECALL_INTERFACE_H__
+#define __SBI_ECALL_INTERFACE_H__
+
+/* clang-format off */
+
+/* SBI Extension IDs */
+#define SBI_EXT_0_1_SET_TIMER 0x0
+#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
+#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
+#define SBI_EXT_0_1_CLEAR_IPI 0x3
+#define SBI_EXT_0_1_SEND_IPI 0x4
+#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
+#define SBI_EXT_0_1_SHUTDOWN 0x8
+#define SBI_EXT_BASE 0x10
+#define SBI_EXT_TIME 0x54494D45
+#define SBI_EXT_IPI 0x735049
+#define SBI_EXT_RFENCE 0x52464E43
+#define SBI_EXT_HSM 0x48534D
+
+/* SBI function IDs for BASE extension*/
+#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
+#define SBI_EXT_BASE_GET_IMP_ID 0x1
+#define SBI_EXT_BASE_GET_IMP_VERSION 0x2
+#define SBI_EXT_BASE_PROBE_EXT 0x3
+#define SBI_EXT_BASE_GET_MVENDORID 0x4
+#define SBI_EXT_BASE_GET_MARCHID 0x5
+#define SBI_EXT_BASE_GET_MIMPID 0x6
+
+/* SBI function IDs for TIME extension*/
+#define SBI_EXT_TIME_SET_TIMER 0x0
+
+/* SBI function IDs for IPI extension*/
+#define SBI_EXT_IPI_SEND_IPI 0x0
+
+/* SBI function IDs for RFENCE extension*/
+#define SBI_EXT_RFENCE_REMOTE_FENCE_I 0x0
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA 0x1
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID 0x2
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA 0x3
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID 0x4
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA 0x5
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID 0x6
+
+/* SBI function IDs for HSM extension */
+#define SBI_EXT_HSM_HART_START 0x0
+#define SBI_EXT_HSM_HART_STOP 0x1
+#define SBI_EXT_HSM_HART_GET_STATUS 0x2
+
+#define SBI_HSM_HART_STATUS_STARTED 0x0
+#define SBI_HSM_HART_STATUS_STOPPED 0x1
+#define SBI_HSM_HART_STATUS_START_PENDING 0x2
+#define SBI_HSM_HART_STATUS_STOP_PENDING 0x3
+
+#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
+#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
+#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
+#define SBI_EXT_VENDOR_START 0x09000000
+#define SBI_EXT_VENDOR_END 0x09FFFFFF
+/* clang-format on */
+
+#endif
--
2.19.1
7:33 p.m.
New subject: [PATCH v3 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit
-----Original Message-----
From: Alistair Francis [mailto:alistair23@gmail.com]
Sent: Thursday, January 6, 2022 6:04 AM
To: Jiangyifei <jiangyifei(a)huawei.com>
Cc: qemu-devel(a)nongnu.org Developers <qemu-devel(a)nongnu.org>; open
list:RISC-V <qemu-riscv(a)nongnu.org>; kvm-riscv(a)lists.infradead.org; open
list:Overall <kvm(a)vger.kernel.org>; libvir-list(a)redhat.com; Anup Patel
<anup.patel(a)wdc.com>; Palmer Dabbelt <palmer(a)dabbelt.com>; Alistair
Francis <Alistair.Francis(a)wdc.com>; Bin Meng <bin.meng(a)windriver.com>;
Fanliang (EulerOS) <fanliang(a)huawei.com>; Wubin (H)
<wu.wubin(a)huawei.com>; Wanghaibin (D) <wanghaibin.wang(a)huawei.com>;
wanbo (G) <wanbo13(a)huawei.com>; limingwang (A)
<limingwang(a)huawei.com>
Subject: Re: [PATCH v3 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit
On Tue, Dec 21, 2021 at 3:41 AM Yifei Jiang via <qemu-devel(a)nongnu.org>
wrote:
>
> Use char-fe to handle console sbi call, which implement early console
> io while apply 'earlycon=sbi' into kernel parameters.
>
> Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
> Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
> Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
> ---
> target/riscv/kvm.c | 43 +++++++++++++++++-
> target/riscv/sbi_ecall_interface.h | 72
> ++++++++++++++++++++++++++++++
> 2 files changed, 114 insertions(+), 1 deletion(-) create mode 100644
> target/riscv/sbi_ecall_interface.h
>
> diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index
> 0027f11f45..4d08669c81 100644
> --- a/target/riscv/kvm.c
> +++ b/target/riscv/kvm.c
> @@ -38,6 +38,9 @@
> #include "qemu/log.h"
> #include "hw/loader.h"
> #include "kvm_riscv.h"
> +#include "sbi_ecall_interface.h"
> +#include "chardev/char-fe.h"
> +#include "semihosting/console.h"
>
> static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
> uint64_t idx) { @@ -365,9 +368,47 @@ bool
> kvm_arch_stop_on_emulation_error(CPUState *cs)
> return true;
> }
>
> +static int kvm_riscv_handle_sbi(CPUState *cs, struct kvm_run *run) {
> + int ret = 0;
> + unsigned char ch;
> + switch (run->riscv_sbi.extension_id) {
> + case SBI_EXT_0_1_CONSOLE_PUTCHAR:
> + ch = run->riscv_sbi.args[0];
> + qemu_semihosting_log_out((const char *)&ch, sizeof(ch));
Hmmm... We print to the semihosting
> + break;
> + case SBI_EXT_0_1_CONSOLE_GETCHAR:
> + ret = qemu_chr_fe_read_all(serial_hd(0)->be, &ch,
> + sizeof(ch));
but then read from the first serial device.
That seems a little strange. Would it be better to just print to serial as well?
Alistair
Hm...I also think so. It will be modified in the next series.
Yifei
> + if (ret == sizeof(ch)) {
> + run->riscv_sbi.args[0] = ch;
> + } else {
> + run->riscv_sbi.args[0] = -1;
> + }
> + break;
> + default:
> + qemu_log_mask(LOG_UNIMP,
> + "%s: un-handled SBI EXIT, specific reasons
is %lu\n",
> + __func__, run->riscv_sbi.extension_id);
> + ret = -1;
> + break;
> + }
> + return ret;
> +}
> +
> int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) {
> - return 0;
> + int ret = 0;
> + switch (run->exit_reason) {
> + case KVM_EXIT_RISCV_SBI:
> + ret = kvm_riscv_handle_sbi(cs, run);
> + break;
> + default:
> + qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
> + __func__, run->exit_reason);
> + ret = -1;
> + break;
> + }
> + return ret;
> }
>
> void kvm_riscv_reset_vcpu(RISCVCPU *cpu) diff --git
> a/target/riscv/sbi_ecall_interface.h
> b/target/riscv/sbi_ecall_interface.h
> new file mode 100644
> index 0000000000..fb1a3fa8f2
> --- /dev/null
> +++ b/target/riscv/sbi_ecall_interface.h
> @@ -0,0 +1,72 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * Copyright (c) 2019 Western Digital Corporation or its affiliates.
> + *
> + * Authors:
> + * Anup Patel <anup.patel(a)wdc.com>
> + */
> +
> +#ifndef __SBI_ECALL_INTERFACE_H__
> +#define __SBI_ECALL_INTERFACE_H__
> +
> +/* clang-format off */
> +
> +/* SBI Extension IDs */
> +#define SBI_EXT_0_1_SET_TIMER 0x0
> +#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
> +#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
> +#define SBI_EXT_0_1_CLEAR_IPI 0x3
> +#define SBI_EXT_0_1_SEND_IPI 0x4
> +#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
> +#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
> +#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
> +#define SBI_EXT_0_1_SHUTDOWN 0x8
> +#define SBI_EXT_BASE 0x10
> +#define SBI_EXT_TIME 0x54494D45
> +#define SBI_EXT_IPI 0x735049
> +#define SBI_EXT_RFENCE 0x52464E43
> +#define SBI_EXT_HSM 0x48534D
> +
> +/* SBI function IDs for BASE extension*/
> +#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
> +#define SBI_EXT_BASE_GET_IMP_ID 0x1
> +#define SBI_EXT_BASE_GET_IMP_VERSION 0x2
> +#define SBI_EXT_BASE_PROBE_EXT 0x3
> +#define SBI_EXT_BASE_GET_MVENDORID 0x4
> +#define SBI_EXT_BASE_GET_MARCHID 0x5
> +#define SBI_EXT_BASE_GET_MIMPID 0x6
> +
> +/* SBI function IDs for TIME extension*/
> +#define SBI_EXT_TIME_SET_TIMER 0x0
> +
> +/* SBI function IDs for IPI extension*/
> +#define SBI_EXT_IPI_SEND_IPI 0x0
> +
> +/* SBI function IDs for RFENCE extension*/
> +#define SBI_EXT_RFENCE_REMOTE_FENCE_I 0x0
> +#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA 0x1
> +#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID 0x2
> +#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA 0x3
> +#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID 0x4
> +#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA 0x5
> +#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID 0x6
> +
> +/* SBI function IDs for HSM extension */
> +#define SBI_EXT_HSM_HART_START 0x0
> +#define SBI_EXT_HSM_HART_STOP 0x1
> +#define SBI_EXT_HSM_HART_GET_STATUS 0x2
> +
> +#define SBI_HSM_HART_STATUS_STARTED 0x0
> +#define SBI_HSM_HART_STATUS_STOPPED 0x1
> +#define SBI_HSM_HART_STATUS_START_PENDING 0x2
> +#define SBI_HSM_HART_STATUS_STOP_PENDING 0x3
> +
> +#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> +#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> +#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
> +#define SBI_EXT_VENDOR_START 0x09000000
> +#define SBI_EXT_VENDOR_END 0x09FFFFFF
> +/* clang-format on */
> +
> +#endif
> --
> 2.19.1
>
>
7:09 a.m.
New subject: [PATCH v3 09/12] target/riscv: Add host cpu type
'host' type cpu is set isa to RV32 or RV64 simply, more isa info
will obtain from KVM in kvm_arch_init_vcpu()
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/cpu.c | 15 +++++++++++++++
target/riscv/cpu.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 3fc3a9c45b..c6d979594b 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -213,6 +213,18 @@ static void rv32_imafcu_nommu_cpu_init(Object *obj)
}
#endif
+#if defined(CONFIG_KVM)
+static void riscv_host_cpu_init(Object *obj)
+{
+ CPURISCVState *env = &RISCV_CPU(obj)->env;
+#if defined(TARGET_RISCV32)
+ set_misa(env, MXL_RV32, 0);
+#elif defined(TARGET_RISCV64)
+ set_misa(env, MXL_RV64, 0);
+#endif
+}
+#endif
+
static ObjectClass *riscv_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
@@ -814,6 +826,9 @@ static const TypeInfo riscv_cpu_type_infos[] = {
.class_init = riscv_cpu_class_init,
},
DEFINE_CPU(TYPE_RISCV_CPU_ANY, riscv_any_cpu_init),
+#if defined(CONFIG_KVM)
+ DEFINE_CPU(TYPE_RISCV_CPU_HOST, riscv_host_cpu_init),
+#endif
#if defined(TARGET_RISCV32)
DEFINE_CPU(TYPE_RISCV_CPU_BASE32, rv32_base_cpu_init),
DEFINE_CPU(TYPE_RISCV_CPU_IBEX, rv32_ibex_cpu_init),
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 2807eb1bcb..e7dba35acb 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -45,6 +45,7 @@
#define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51")
#define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34")
#define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54")
+#define TYPE_RISCV_CPU_HOST RISCV_CPU_TYPE_NAME("host")
#if defined(TARGET_RISCV32)
# define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer
Add kvm_riscv_get/put_regs_timer to synchronize virtual time context
from KVM.
To set register of RISCV_TIMER_REG(state) will occur a error from KVM
on kvm_timer_state == 0. It's better to adapt in KVM, but it doesn't matter
that adaping in QEMU.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
---
target/riscv/cpu.h | 7 +++++
target/riscv/kvm.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 79 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index e7dba35acb..c892a2c8b7 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -259,6 +259,13 @@ struct CPURISCVState {
hwaddr kernel_addr;
hwaddr fdt_addr;
+
+ /* kvm timer */
+ bool kvm_timer_dirty;
+ uint64_t kvm_timer_time;
+ uint64_t kvm_timer_compare;
+ uint64_t kvm_timer_state;
+ uint64_t kvm_timer_frequency;
};
OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 4d08669c81..3c20ec5ad3 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -41,6 +41,7 @@
#include "sbi_ecall_interface.h"
#include "chardev/char-fe.h"
#include "semihosting/console.h"
+#include "migration/migration.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -65,6 +66,9 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
#define RISCV_CSR_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_CSR, \
KVM_REG_RISCV_CSR_REG(name))
+#define RISCV_TIMER_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_TIMER, \
+ KVM_REG_RISCV_TIMER_REG(name))
+
#define RISCV_FP_F_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_F, idx)
#define RISCV_FP_D_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_D, idx)
@@ -85,6 +89,22 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
} \
} while(0)
+#define KVM_RISCV_GET_TIMER(cs, env, name, reg) \
+ do { \
+ int ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(env, name), ®); \
+ if (ret) { \
+ abort(); \
+ } \
+ } while(0)
+
+#define KVM_RISCV_SET_TIMER(cs, env, name, reg) \
+ do { \
+ int ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(env, time), ®); \
+ if (ret) { \
+ abort(); \
+ } \
+ } while (0)
+
static int kvm_riscv_get_regs_core(CPUState *cs)
{
int ret = 0;
@@ -236,6 +256,58 @@ static int kvm_riscv_put_regs_fp(CPUState *cs)
return ret;
}
+static void kvm_riscv_get_regs_timer(CPUState *cs)
+{
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (env->kvm_timer_dirty) {
+ return;
+ }
+
+ KVM_RISCV_GET_TIMER(cs, env, time, env->kvm_timer_time);
+ KVM_RISCV_GET_TIMER(cs, env, compare, env->kvm_timer_compare);
+ KVM_RISCV_GET_TIMER(cs, env, state, env->kvm_timer_state);
+ KVM_RISCV_GET_TIMER(cs, env, frequency, env->kvm_timer_frequency);
+
+ env->kvm_timer_dirty = true;
+}
+
+static void kvm_riscv_put_regs_timer(CPUState *cs)
+{
+ uint64_t reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (!env->kvm_timer_dirty) {
+ return;
+ }
+
+ KVM_RISCV_SET_TIMER(cs, env, time, env->kvm_timer_time);
+ KVM_RISCV_SET_TIMER(cs, env, compare, env->kvm_timer_compare);
+
+ /*
+ * To set register of RISCV_TIMER_REG(state) will occur a error from KVM
+ * on env->kvm_timer_state == 0, It's better to adapt in KVM, but it
+ * doesn't matter that adaping in QEMU now.
+ * TODO If KVM changes, adapt here.
+ */
+ if (env->kvm_timer_state) {
+ KVM_RISCV_SET_TIMER(cs, env, state, env->kvm_timer_state);
+ }
+
+ /*
+ * For now, migration will not work between Hosts with different timer
+ * frequency. Therefore, we should check whether they are the same here
+ * during the migration.
+ */
+ if (migration_is_running(migrate_get_current()->state)) {
+ KVM_RISCV_GET_TIMER(cs, env, frequency, reg);
+ if (reg != env->kvm_timer_frequency) {
+ error_report("Dst Hosts timer frequency != Src Hosts");
+ }
+ }
+
+ env->kvm_timer_dirty = false;
+}
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
--
2.19.1
12:06 a.m.
New subject: [PATCH v3 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer
On Mon, Dec 20, 2021 at 6:39 PM Yifei Jiang <jiangyifei(a)huawei.com> wrote:
Add kvm_riscv_get/put_regs_timer to synchronize virtual time context
from KVM.
To set register of RISCV_TIMER_REG(state) will occur a error from KVM
on kvm_timer_state == 0. It's better to adapt in KVM, but it doesn't matter
that adaping in QEMU.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Looks good to me.
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
Regards,
Anup
---
target/riscv/cpu.h | 7 +++++
target/riscv/kvm.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 79 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index e7dba35acb..c892a2c8b7 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -259,6 +259,13 @@ struct CPURISCVState {
hwaddr kernel_addr;
hwaddr fdt_addr;
+
+ /* kvm timer */
+ bool kvm_timer_dirty;
+ uint64_t kvm_timer_time;
+ uint64_t kvm_timer_compare;
+ uint64_t kvm_timer_state;
+ uint64_t kvm_timer_frequency;
};
OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 4d08669c81..3c20ec5ad3 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -41,6 +41,7 @@
#include "sbi_ecall_interface.h"
#include "chardev/char-fe.h"
#include "semihosting/console.h"
+#include "migration/migration.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -65,6 +66,9 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
#define RISCV_CSR_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_CSR, \
KVM_REG_RISCV_CSR_REG(name))
+#define RISCV_TIMER_REG(env, name) kvm_riscv_reg_id(env, KVM_REG_RISCV_TIMER, \
+ KVM_REG_RISCV_TIMER_REG(name))
+
#define RISCV_FP_F_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_F, idx)
#define RISCV_FP_D_REG(env, idx) kvm_riscv_reg_id(env, KVM_REG_RISCV_FP_D, idx)
@@ -85,6 +89,22 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx
} \
} while(0)
+#define KVM_RISCV_GET_TIMER(cs, env, name, reg) \
+ do { \
+ int ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(env, name), ®); \
+ if (ret) { \
+ abort(); \
+ } \
+ } while(0)
+
+#define KVM_RISCV_SET_TIMER(cs, env, name, reg) \
+ do { \
+ int ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(env, time), ®); \
+ if (ret) { \
+ abort(); \
+ } \
+ } while (0)
+
static int kvm_riscv_get_regs_core(CPUState *cs)
{
int ret = 0;
@@ -236,6 +256,58 @@ static int kvm_riscv_put_regs_fp(CPUState *cs)
return ret;
}
+static void kvm_riscv_get_regs_timer(CPUState *cs)
+{
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (env->kvm_timer_dirty) {
+ return;
+ }
+
+ KVM_RISCV_GET_TIMER(cs, env, time, env->kvm_timer_time);
+ KVM_RISCV_GET_TIMER(cs, env, compare, env->kvm_timer_compare);
+ KVM_RISCV_GET_TIMER(cs, env, state, env->kvm_timer_state);
+ KVM_RISCV_GET_TIMER(cs, env, frequency, env->kvm_timer_frequency);
+
+ env->kvm_timer_dirty = true;
+}
+
+static void kvm_riscv_put_regs_timer(CPUState *cs)
+{
+ uint64_t reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (!env->kvm_timer_dirty) {
+ return;
+ }
+
+ KVM_RISCV_SET_TIMER(cs, env, time, env->kvm_timer_time);
+ KVM_RISCV_SET_TIMER(cs, env, compare, env->kvm_timer_compare);
+
+ /*
+ * To set register of RISCV_TIMER_REG(state) will occur a error from KVM
+ * on env->kvm_timer_state == 0, It's better to adapt in KVM, but it
+ * doesn't matter that adaping in QEMU now.
+ * TODO If KVM changes, adapt here.
+ */
+ if (env->kvm_timer_state) {
+ KVM_RISCV_SET_TIMER(cs, env, state, env->kvm_timer_state);
+ }
+
+ /*
+ * For now, migration will not work between Hosts with different timer
+ * frequency. Therefore, we should check whether they are the same here
+ * during the migration.
+ */
+ if (migration_is_running(migrate_get_current()->state)) {
+ KVM_RISCV_GET_TIMER(cs, env, frequency, reg);
+ if (reg != env->kvm_timer_frequency) {
+ error_report("Dst Hosts timer frequency != Src Hosts");
+ }
+ }
+
+ env->kvm_timer_dirty = false;
+}
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 11/12] target/riscv: Implement virtual time adjusting with vm state changing
We hope that virtual time adjusts with vm state changing. When a vm
is stopped, guest virtual time should stop counting and kvm_timer
should be stopped. When the vm is resumed, guest virtual time should
continue to count and kvm_timer should be restored.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/kvm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 3c20ec5ad3..6c0306bd2b 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -42,6 +42,7 @@
#include "chardev/char-fe.h"
#include "semihosting/console.h"
#include "migration/migration.h"
+#include "sysemu/runstate.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -378,6 +379,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu)
return cpu->cpu_index;
}
+static void kvm_riscv_vm_state_change(void *opaque, bool running, RunState state)
+{
+ CPUState *cs = opaque;
+
+ if (running) {
+ kvm_riscv_put_regs_timer(cs);
+ } else {
+ kvm_riscv_get_regs_timer(cs);
+ }
+}
+
void kvm_arch_init_irq_routing(KVMState *s)
{
}
@@ -390,6 +402,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
CPURISCVState *env = &cpu->env;
uint64_t id;
+ qemu_add_vm_change_state_handler(kvm_riscv_vm_state_change, cs);
+
id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
ret = kvm_get_one_reg(cs, id, &isa);
if (ret) {
--
2.19.1
4:04 p.m.
New subject: [PATCH v3 11/12] target/riscv: Implement virtual time adjusting with vm state changing
On Tue, Dec 21, 2021 at 3:45 AM Yifei Jiang via <qemu-devel(a)nongnu.org> wrote:
We hope that virtual time adjusts with vm state changing. When a vm
is stopped, guest virtual time should stop counting and kvm_timer
should be stopped. When the vm is resumed, guest virtual time should
continue to count and kvm_timer should be restored.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Alistair
---
target/riscv/kvm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 3c20ec5ad3..6c0306bd2b 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -42,6 +42,7 @@
#include "chardev/char-fe.h"
#include "semihosting/console.h"
#include "migration/migration.h"
+#include "sysemu/runstate.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -378,6 +379,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu)
return cpu->cpu_index;
}
+static void kvm_riscv_vm_state_change(void *opaque, bool running, RunState state)
+{
+ CPUState *cs = opaque;
+
+ if (running) {
+ kvm_riscv_put_regs_timer(cs);
+ } else {
+ kvm_riscv_get_regs_timer(cs);
+ }
+}
+
void kvm_arch_init_irq_routing(KVMState *s)
{
}
@@ -390,6 +402,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
CPURISCVState *env = &cpu->env;
uint64_t id;
+ qemu_add_vm_change_state_handler(kvm_riscv_vm_state_change, cs);
+
id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
ret = kvm_get_one_reg(cs, id, &isa);
if (ret) {
--
2.19.1
7:09 a.m.
New subject: [PATCH v3 12/12] target/riscv: Support virtual time context synchronization
Add virtual time context description to vmstate_kvmtimer. After cpu being
loaded, virtual time context is updated to KVM.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
---
target/riscv/machine.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index ad8248ebfd..95eb82792a 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -164,6 +164,35 @@ static const VMStateDescription vmstate_pointermasking = {
}
};
+static bool kvmtimer_needed(void *opaque)
+{
+ return kvm_enabled();
+}
+
+static int cpu_post_load(void *opaque, int version_id)
+{
+ RISCVCPU *cpu = opaque;
+ CPURISCVState *env = &cpu->env;
+
+ env->kvm_timer_dirty = true;
+ return 0;
+}
+
+static const VMStateDescription vmstate_kvmtimer = {
+ .name = "cpu/kvmtimer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = kvmtimer_needed,
+ .post_load = cpu_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(env.kvm_timer_time, RISCVCPU),
+ VMSTATE_UINT64(env.kvm_timer_compare, RISCVCPU),
+ VMSTATE_UINT64(env.kvm_timer_state, RISCVCPU),
+
+ VMSTATE_END_OF_LIST()
+ }
+};
+
const VMStateDescription vmstate_riscv_cpu = {
.name = "cpu",
.version_id = 3,
@@ -218,6 +247,7 @@ const VMStateDescription vmstate_riscv_cpu = {
&vmstate_hyper,
&vmstate_vector,
&vmstate_pointermasking,
+ &vmstate_kvmtimer,
NULL
}
};
--
2.19.1
4:10 p.m.
New subject: [PATCH v3 12/12] target/riscv: Support virtual time context synchronization
On Tue, Dec 21, 2021 at 2:44 AM Yifei Jiang via <qemu-devel(a)nongnu.org> wrote:
Add virtual time context description to vmstate_kvmtimer. After cpu being
loaded, virtual time context is updated to KVM.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Mingwang Li <limingwang(a)huawei.com>
Reviewed-by: Anup Patel <anup.patel(a)wdc.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
Alistair
---
target/riscv/machine.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index ad8248ebfd..95eb82792a 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -164,6 +164,35 @@ static const VMStateDescription vmstate_pointermasking = {
}
};
+static bool kvmtimer_needed(void *opaque)
+{
+ return kvm_enabled();
+}
+
+static int cpu_post_load(void *opaque, int version_id)
+{
+ RISCVCPU *cpu = opaque;
+ CPURISCVState *env = &cpu->env;
+
+ env->kvm_timer_dirty = true;
+ return 0;
+}
+
+static const VMStateDescription vmstate_kvmtimer = {
+ .name = "cpu/kvmtimer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = kvmtimer_needed,
+ .post_load = cpu_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(env.kvm_timer_time, RISCVCPU),
+ VMSTATE_UINT64(env.kvm_timer_compare, RISCVCPU),
+ VMSTATE_UINT64(env.kvm_timer_state, RISCVCPU),
+
+ VMSTATE_END_OF_LIST()
+ }
+};
+
const VMStateDescription vmstate_riscv_cpu = {
.name = "cpu",
.version_id = 3,
@@ -218,6 +247,7 @@ const VMStateDescription vmstate_riscv_cpu = {
&vmstate_hyper,
&vmstate_vector,
&vmstate_pointermasking,
+ &vmstate_kvmtimer,
NULL
}
};
--
2.19.1
1030
days inactive
1051
days old
21 comments
4 participants
participants (4)
-
Alistair Francis -
Anup Patel -
Jiangyifei -
Yifei Jiang