4:21 a.m.
This series adds both riscv32 and riscv64 kvm support, and implements
migration based on riscv. It is based on temporarily unaccepted kvm:
https://github.com/kvm-riscv/linux
Compared to RFC v2, the migration is supported in this series. The new
added migration feature also requires the following patches:
[1]
[PATCH RFC 0/2] Add log dirty support
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2284945.html
[2]
[PATCH] target/riscv: raise exception to HS-mode at get_physical_address
https://patchew.org/QEMU/20200824084158.1769-1-jiangyifei@huawei.com/
Several steps to use this:
1. Build emulation
$ ./configure --target-list=riscv64-softmmu
$ make -j$(nproc)
2. Build kernel
https://github.com/kvm-riscv/linux
3. Build QEMU VM
I 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"
This following link describes the details about live migration steps:
https://gitee.com/openeuler/qemu/wikis/Live%20migration?sort_id=2767831
Changes since RFC v2
1. Fix checkpatch error at target/riscv/sbi_ecall_interface.h.
2. Add riscv migration support.
Changes since RFC v1
1. Add separate SBI ecall interface header.
2. Add riscv32 kvm accel support.
Yifei Jiang (14):
linux-header: Update linux/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
arget/riscv: Implement kvm_arch_put_registers
target/riscv: Support start kernel directly by KVM
hw/riscv: PLIC update external interrupt by KVM when kvm enabled
target/riscv: Handler KVM_EXIT_RISCV_SBI exit
target/riscv: Add host cpu type
target/riscv: Add sifive_plic vmstate
target/riscv: Support riscv cpu vmstate
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
configure | 1 +
hw/riscv/sifive_plic.c | 55 ++-
hw/riscv/virt.c | 8 +
include/hw/riscv/sifive_plic.h | 1 +
linux-headers/linux/kvm.h | 8 +
target/riscv/cpu.c | 41 +-
target/riscv/cpu.h | 10 +
target/riscv/kvm.c | 599 +++++++++++++++++++++++++++++
target/riscv/kvm_riscv.h | 25 ++
target/riscv/meson.build | 1 +
target/riscv/sbi_ecall_interface.h | 72 ++++
11 files changed, 809 insertions(+), 12 deletions(-)
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
4:21 a.m.
New subject: [PATCH RFC v3 01/14] linux-header: Update linux/kvm.h
Update linux-headers/linux/kvm.h from https://github.com/kvm-riscv/linux.
Only use this header file, so here do not update all linux headers by
update-linux-headers.sh until above KVM series is accepted.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
linux-headers/linux/kvm.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index a28c366737..b2d3721798 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -248,6 +248,7 @@ struct kvm_hyperv_exit {
#define KVM_EXIT_IOAPIC_EOI 26
#define KVM_EXIT_HYPERV 27
#define KVM_EXIT_ARM_NISV 28
+#define KVM_EXIT_RISCV_SBI 28
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
@@ -412,6 +413,13 @@ struct kvm_run {
__u64 esr_iss;
__u64 fault_ipa;
} arm_nisv;
+ /* KVM_EXIT_RISCV_SBI */
+ struct {
+ unsigned long extension_id;
+ unsigned long function_id;
+ unsigned long args[6];
+ unsigned long ret[2];
+ } riscv_sbi;
/* Fix the size of the union. */
char padding[256];
};
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 02/14] 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 configure file.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
Reviewed-by: Alistair Francis <alistair.francis(a)wdc.com>
---
configure | 1 +
target/riscv/kvm.c | 128 +++++++++++++++++++++++++++++++++++++++
target/riscv/meson.build | 1 +
3 files changed, 130 insertions(+)
create mode 100644 target/riscv/kvm.c
diff --git a/configure b/configure
index b8f5b81a67..f1fe4021d4 100755
--- a/configure
+++ b/configure
@@ -269,6 +269,7 @@ supported_kvm_target() {
x86_64:i386 | x86_64:x86_64 | x86_64:x32 | \
mips:mips | mipsel:mips | mips64:mips | mips64el:mips | \
ppc:ppc | ppc64:ppc | ppc:ppc64 | ppc64:ppc64 | ppc64:ppc64le | \
+ riscv32:riscv32 | riscv64:riscv64 | \
s390x:s390x)
return 0
;;
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
new file mode 100644
index 0000000000..8c386d9acf
--- /dev/null
+++ b/target/riscv/kvm.c
@@ -0,0 +1,128 @@
+/*
+ * 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;
+}
diff --git a/target/riscv/meson.build b/target/riscv/meson.build
index abd647fea1..66d0dfd0c9 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -23,6 +23,7 @@ riscv_ss.add(files(
'vector_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
4:21 a.m.
New subject: [PATCH RFC v3 03/14] 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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/kvm.c | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 8c386d9acf..7983f43f3f 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,18 @@
#include "qemu/log.h"
#include "hw/loader.h"
+static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
+{
+ __u64 id = KVM_REG_RISCV | type | idx;
+
+#if defined(TARGET_RISCV32)
+ id |= KVM_REG_SIZE_U32;
+#elif defined(TARGET_RISCV64)
+ id |= KVM_REG_SIZE_U64;
+#endif
+ return id;
+}
+
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
@@ -79,7 +91,19 @@ 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);
+ __u64 id;
+
+ id = kvm_riscv_reg_id(KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
+ ret = kvm_get_one_reg(cs, id, &isa);
+ if (ret) {
+ return ret;
+ }
+ cpu->env.misa = isa;
+
+ return ret;
}
int kvm_arch_msi_data_to_gsi(uint32_t data)
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 04/14] 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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/kvm.c | 150 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 149 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 7983f43f3f..e91f505607 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -50,13 +50,161 @@ static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
return id;
}
+#define RISCV_CORE_REG(name) kvm_riscv_reg_id(KVM_REG_RISCV_CORE, \
+ KVM_REG_RISCV_CORE_REG(name))
+
+#define RISCV_CSR_REG(name) kvm_riscv_reg_id(KVM_REG_RISCV_CSR, \
+ KVM_REG_RISCV_CSR_REG(name))
+
+#define RISCV_FP_F_REG(idx) kvm_riscv_reg_id(KVM_REG_RISCV_FP_F, idx)
+
+#define RISCV_FP_D_REG(idx) kvm_riscv_reg_id(KVM_REG_RISCV_FP_D, idx)
+
+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(regs.pc), ®);
+ if (ret) {
+ return ret;
+ }
+ env->pc = reg;
+
+ for (i = 1; i < 32; i++) {
+ __u64 id = kvm_riscv_reg_id(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;
+ target_ulong reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(sstatus), ®);
+ if (ret) {
+ return ret;
+ }
+ env->mstatus = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(sie), ®);
+ if (ret) {
+ return ret;
+ }
+ env->mie = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(stvec), ®);
+ if (ret) {
+ return ret;
+ }
+ env->stvec = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(sscratch), ®);
+ if (ret) {
+ return ret;
+ }
+ env->sscratch = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(sepc), ®);
+ if (ret) {
+ return ret;
+ }
+ env->sepc = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(scause), ®);
+ if (ret) {
+ return ret;
+ }
+ env->scause = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(stval), ®);
+ if (ret) {
+ return ret;
+ }
+ env->sbadaddr = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(sip), ®);
+ if (ret) {
+ return ret;
+ }
+ env->mip = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_CSR_REG(satp), ®);
+ if (ret) {
+ return ret;
+ }
+ env->satp = reg;
+
+ 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(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(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
4:21 a.m.
New subject: [PATCH RFC v3 05/14] arget/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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/kvm.c | 142 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 141 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index e91f505607..7afb4263e9 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -85,6 +85,31 @@ 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(regs.pc), ®);
+ if (ret) {
+ return ret;
+ }
+
+ for (i = 1; i < 32; i++) {
+ __u64 id = kvm_riscv_reg_id(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;
@@ -148,6 +173,70 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
return ret;
}
+static int kvm_riscv_put_regs_csr(CPUState *cs)
+{
+ int ret = 0;
+ target_ulong reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ reg = env->mstatus;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(sstatus), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->mie;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(sie), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->stvec;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(stvec), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->sscratch;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(sscratch), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->sepc;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(sepc), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->scause;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(scause), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->sbadaddr;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(stval), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->mip;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(sip), ®);
+ if (ret) {
+ return ret;
+ }
+
+ reg = env->satp;
+ ret = kvm_set_one_reg(cs, RISCV_CSR_REG(satp), ®);
+ if (ret) {
+ return ret;
+ }
+
+ return ret;
+}
+
+
static int kvm_riscv_get_regs_fp(CPUState *cs)
{
int ret = 0;
@@ -181,6 +270,40 @@ 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(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(i), ®);
+ if (ret) {
+ return ret;
+ }
+ }
+ return ret;
+ }
+
+ return ret;
+}
+
+
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
@@ -209,7 +332,24 @@ 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
4:21 a.m.
New subject: [PATCH RFC v3 06/14] 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. In addition, add kvm_riscv.h to place riscv specific
interface.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
hw/riscv/virt.c | 8 ++++++++
target/riscv/cpu.c | 4 ++++
target/riscv/cpu.h | 3 +++
target/riscv/kvm.c | 14 ++++++++++++++
target/riscv/kvm_riscv.h | 24 ++++++++++++++++++++++++
5 files changed, 53 insertions(+)
create mode 100644 target/riscv/kvm_riscv.h
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 6e91cf129e..e3336522bf 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -41,6 +41,7 @@
#include "sysemu/sysemu.h"
#include "hw/pci/pci.h"
#include "hw/pci-host/gpex.h"
+#include "sysemu/kvm.h"
#if defined(TARGET_RISCV32)
# define BIOS_FILENAME "opensbi-riscv32-generic-fw_dynamic.bin"
@@ -482,6 +483,7 @@ static void virt_machine_init(MachineState *machine)
uint64_t kernel_entry;
int i;
unsigned int smp_cpus = machine->smp.cpus;
+ CPUState *cs;
/* Initialize SOC */
object_initialize_child(OBJECT(machine), "soc", &s->soc,
@@ -547,6 +549,12 @@ static void virt_machine_init(MachineState *machine)
virt_memmap[VIRT_MROM].size, kernel_entry,
fdt_load_addr, s->fdt);
+ for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
+ RISCVCPU *riscv_cpu = RISCV_CPU(cs);
+ riscv_cpu->env.kernel_addr = kernel_entry;
+ riscv_cpu->env.fdt_addr = fdt_load_addr;
+ }
+
/* create PLIC hart topology configuration string */
plic_hart_config_len = (strlen(VIRT_PLIC_HART_CONFIG) + 1) * smp_cpus;
plic_hart_config = g_malloc0(plic_hart_config_len);
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 228b9bdb5d..266e70cc47 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -28,6 +28,7 @@
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "fpu/softfloat-helpers.h"
+#include "kvm_riscv.h"
/* RISC-V CPU definitions */
@@ -321,6 +322,9 @@ static void riscv_cpu_reset(DeviceState *dev)
cs->exception_index = EXCP_NONE;
env->load_res = -1;
set_default_nan_mode(1, &env->fp_status);
+#ifdef CONFIG_KVM
+ 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 a804a5d0ba..d4cafe37e1 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -229,6 +229,9 @@ struct CPURISCVState {
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *timer; /* Internal timer */
+
+ hwaddr kernel_addr;
+ hwaddr fdt_addr;
};
#define RISCV_CPU_CLASS(klass) \
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 7afb4263e9..69217add16 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 __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
{
@@ -438,3 +439,16 @@ 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 */
+}
+
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
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 07/14] hw/riscv: PLIC update external interrupt by KVM when kvm enabled
Only support supervisor external interrupt currently.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
hw/riscv/sifive_plic.c | 31 ++++++++++++++++++++++---------
target/riscv/kvm.c | 19 +++++++++++++++++++
target/riscv/kvm_riscv.h | 1 +
3 files changed, 42 insertions(+), 9 deletions(-)
diff --git a/hw/riscv/sifive_plic.c b/hw/riscv/sifive_plic.c
index c20c192034..9c5a131e0f 100644
--- a/hw/riscv/sifive_plic.c
+++ b/hw/riscv/sifive_plic.c
@@ -30,6 +30,8 @@
#include "target/riscv/cpu.h"
#include "sysemu/sysemu.h"
#include "hw/riscv/sifive_plic.h"
+#include "sysemu/kvm.h"
+#include "kvm_riscv.h"
#define RISCV_DEBUG_PLIC 0
@@ -146,15 +148,26 @@ static void sifive_plic_update(SiFivePLICState *plic)
continue;
}
int level = sifive_plic_irqs_pending(plic, addrid);
- switch (mode) {
- case PLICMode_M:
- riscv_cpu_update_mip(RISCV_CPU(cpu), MIP_MEIP, BOOL_TO_MASK(level));
- break;
- case PLICMode_S:
- riscv_cpu_update_mip(RISCV_CPU(cpu), MIP_SEIP, BOOL_TO_MASK(level));
- break;
- default:
- break;
+ if (kvm_enabled()) {
+ if (mode == PLICMode_M) {
+ continue;
+ }
+#ifdef CONFIG_KVM
+ kvm_riscv_set_irq(RISCV_CPU(cpu), IRQ_S_EXT, level);
+#endif
+ } else {
+ switch (mode) {
+ case PLICMode_M:
+ riscv_cpu_update_mip(RISCV_CPU(cpu),
+ MIP_MEIP, BOOL_TO_MASK(level));
+ break;
+ case PLICMode_S:
+ riscv_cpu_update_mip(RISCV_CPU(cpu),
+ MIP_SEIP, BOOL_TO_MASK(level));
+ break;
+ default:
+ break;
+ }
}
}
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 69217add16..d510d23da1 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -452,3 +452,22 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
env->gpr[11] = cpu->env.fdt_addr; /* a1 */
}
+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) {
+ return;
+ }
+
+ if (!kvm_enabled()) {
+ return;
+ }
+
+ ret = kvm_vcpu_ioctl(CPU(cpu), KVM_INTERRUPT, &virq);
+ if (ret < 0) {
+ perror("Set irq failed");
+ abort();
+ }
+}
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
4:21 a.m.
New subject: [PATCH RFC v3 08/14] target/riscv: Handler KVM_EXIT_RISCV_SBI exit
Use char-fe handler 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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/kvm.c | 42 ++++++++++++++++-
target/riscv/sbi_ecall_interface.h | 72 ++++++++++++++++++++++++++++++
2 files changed, 113 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 d510d23da1..b49df6dd9c 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,8 @@
#include "qemu/log.h"
#include "hw/loader.h"
#include "kvm_riscv.h"
+#include "sbi_ecall_interface.h"
+#include "chardev/char-fe.h"
static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
{
@@ -435,9 +437,47 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
return true;
}
+static int kvm_riscv_handle_sbi(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_chr_fe_write(serial_hd(0)->be, &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(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
4:21 a.m.
New subject: [PATCH RFC v3 09/14] target/riscv: Add host cpu type
Currently, host cpu is inherited simply.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/cpu.c | 6 ++++++
target/riscv/cpu.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 266e70cc47..d8c32a8f84 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -179,6 +179,10 @@ static void rv32_imafcu_nommu_cpu_init(Object *obj)
#endif
+static void riscv_host_cpu_init(Object *obj)
+{
+}
+
static ObjectClass *riscv_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
@@ -635,10 +639,12 @@ static const TypeInfo riscv_cpu_type_infos[] = {
DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E31, rvxx_sifive_e_cpu_init),
DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E34, rv32_imafcu_nommu_cpu_init),
DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U34, rvxx_sifive_u_cpu_init),
+ DEFINE_CPU(TYPE_RISCV_CPU_HOST, riscv_host_cpu_init),
#elif defined(TARGET_RISCV64)
DEFINE_CPU(TYPE_RISCV_CPU_BASE64, riscv_base_cpu_init),
DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E51, rvxx_sifive_e_cpu_init),
DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U54, rvxx_sifive_u_cpu_init),
+ DEFINE_CPU(TYPE_RISCV_CPU_HOST, riscv_host_cpu_init),
#endif
};
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index d4cafe37e1..7795e7ae13 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -42,6 +42,7 @@
#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")
#define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2))
#define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2))
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 10/14] target/riscv: Add sifive_plic vmstate
Add sifive_plic vmstate for supporting sifive_plic migration.
Current vmstate framework only supports one structure parameter
as num field to describe variable length arrays, so introduce
num_enables.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
hw/riscv/sifive_plic.c | 24 +++++++++++++++++++++++-
include/hw/riscv/sifive_plic.h | 1 +
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/hw/riscv/sifive_plic.c b/hw/riscv/sifive_plic.c
index 9c5a131e0f..897dc289a0 100644
--- a/hw/riscv/sifive_plic.c
+++ b/hw/riscv/sifive_plic.c
@@ -32,6 +32,7 @@
#include "hw/riscv/sifive_plic.h"
#include "sysemu/kvm.h"
#include "kvm_riscv.h"
+#include "migration/vmstate.h"
#define RISCV_DEBUG_PLIC 0
@@ -460,11 +461,12 @@ static void sifive_plic_realize(DeviceState *dev, Error **errp)
TYPE_SIFIVE_PLIC, plic->aperture_size);
parse_hart_config(plic);
plic->bitfield_words = (plic->num_sources + 31) >> 5;
+ plic->num_enables = plic->bitfield_words * plic->num_addrs;
plic->source_priority = g_new0(uint32_t, plic->num_sources);
plic->target_priority = g_new(uint32_t, plic->num_addrs);
plic->pending = g_new0(uint32_t, plic->bitfield_words);
plic->claimed = g_new0(uint32_t, plic->bitfield_words);
- plic->enable = g_new0(uint32_t, plic->bitfield_words * plic->num_addrs);
+ plic->enable = g_new0(uint32_t, plic->num_enables);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &plic->mmio);
qdev_init_gpio_in(dev, sifive_plic_irq_request, plic->num_sources);
@@ -484,12 +486,32 @@ static void sifive_plic_realize(DeviceState *dev, Error **errp)
msi_nonbroken = true;
}
+static const VMStateDescription vmstate_sifive_plic = {
+ .name = "riscv_sifive_plic",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VARRAY_UINT32(source_priority, SiFivePLICState, num_sources, 0,
+ vmstate_info_uint32, uint32_t),
+ VMSTATE_VARRAY_UINT32(target_priority, SiFivePLICState, num_addrs, 0,
+ vmstate_info_uint32, uint32_t),
+ VMSTATE_VARRAY_UINT32(pending, SiFivePLICState, bitfield_words, 0,
+ vmstate_info_uint32, uint32_t),
+ VMSTATE_VARRAY_UINT32(claimed, SiFivePLICState, bitfield_words, 0,
+ vmstate_info_uint32, uint32_t),
+ VMSTATE_VARRAY_UINT32(enable, SiFivePLICState, num_enables, 0,
+ vmstate_info_uint32, uint32_t),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static void sifive_plic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_props(dc, sifive_plic_properties);
dc->realize = sifive_plic_realize;
+ dc->vmsd = &vmstate_sifive_plic;
}
static const TypeInfo sifive_plic_info = {
diff --git a/include/hw/riscv/sifive_plic.h b/include/hw/riscv/sifive_plic.h
index 4421e81249..130df0cf1c 100644
--- a/include/hw/riscv/sifive_plic.h
+++ b/include/hw/riscv/sifive_plic.h
@@ -49,6 +49,7 @@ typedef struct SiFivePLICState {
MemoryRegion mmio;
uint32_t num_addrs;
uint32_t bitfield_words;
+ uint32_t num_enables;
PLICAddr *addr_config;
uint32_t *source_priority;
uint32_t *target_priority;
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 11/14] target/riscv: Support riscv cpu vmstate
Describe gpr, fpr and csr in vmstate_riscv_cpu.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/cpu.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index d8c32a8f84..b698f4adbb 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -26,7 +26,7 @@
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/qdev-properties.h"
-#include "migration/vmstate.h"
+#include "migration/cpu.h"
#include "fpu/softfloat-helpers.h"
#include "kvm_riscv.h"
@@ -499,7 +499,23 @@ static void riscv_cpu_init(Object *obj)
#ifndef CONFIG_USER_ONLY
static const VMStateDescription vmstate_riscv_cpu = {
.name = "cpu",
- .unmigratable = 1,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINTTL_ARRAY(env.gpr, RISCVCPU, 32),
+ VMSTATE_UINT64_ARRAY(env.fpr, RISCVCPU, 32),
+ VMSTATE_UINTTL(env.pc, RISCVCPU),
+ VMSTATE_UINTTL(env.mstatus, RISCVCPU),
+ VMSTATE_UINTTL(env.mie, RISCVCPU),
+ VMSTATE_UINTTL(env.stvec, RISCVCPU),
+ VMSTATE_UINTTL(env.sscratch, RISCVCPU),
+ VMSTATE_UINTTL(env.sepc, RISCVCPU),
+ VMSTATE_UINTTL(env.scause, RISCVCPU),
+ VMSTATE_UINTTL(env.sbadaddr, RISCVCPU),
+ VMSTATE_UINTTL(env.mip, RISCVCPU),
+ VMSTATE_UINTTL(env.satp, RISCVCPU),
+ VMSTATE_END_OF_LIST()
+ }
};
#endif
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 12/14] target/riscv: Add kvm_riscv_get/put_regs_timer
Add kvm_riscv_get/put_regs_timer to synchronize virtual time context
from KVM. The frequency of virtual time is not supported by KVM_SET_ONE_REG,
So it's useless to synchronize the frequency of virtual time.
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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/cpu.h | 6 ++++
target/riscv/kvm.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 78 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 7795e7ae13..b735258f27 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -233,6 +233,12 @@ 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;
};
#define RISCV_CPU_CLASS(klass) \
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index b49df6dd9c..59c537b1cb 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -59,6 +59,9 @@ static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
#define RISCV_CSR_REG(name) kvm_riscv_reg_id(KVM_REG_RISCV_CSR, \
KVM_REG_RISCV_CSR_REG(name))
+#define RISCV_TIMER_REG(name) kvm_riscv_reg_id(KVM_REG_RISCV_TIMER, \
+ KVM_REG_RISCV_TIMER_REG(name))
+
#define RISCV_FP_F_REG(idx) kvm_riscv_reg_id(KVM_REG_RISCV_FP_F, idx)
#define RISCV_FP_D_REG(idx) kvm_riscv_reg_id(KVM_REG_RISCV_FP_D, idx)
@@ -306,6 +309,75 @@ static int kvm_riscv_put_regs_fp(CPUState *cs)
return ret;
}
+static void kvm_riscv_get_regs_timer(CPUState *cs)
+{
+ int ret;
+ uint64_t reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (env->kvm_timer_dirty) {
+ return;
+ }
+
+ ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(time), ®);
+ if (ret) {
+ abort();
+ }
+ env->kvm_timer_time = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(compare), ®);
+ if (ret) {
+ abort();
+ }
+ env->kvm_timer_compare = reg;
+
+ ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(state), ®);
+ if (ret) {
+ abort();
+ }
+ env->kvm_timer_state = reg;
+
+ env->kvm_timer_dirty = true;
+}
+
+static void kvm_riscv_put_regs_timer(CPUState *cs)
+{
+ int ret;
+ uint64_t reg;
+ CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+ if (!env->kvm_timer_dirty) {
+ return;
+ }
+
+ reg = env->kvm_timer_time;
+ ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(time), ®);
+ if (ret) {
+ abort();
+ }
+
+ reg = env->kvm_timer_compare;
+ ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(compare), ®);
+ if (ret) {
+ abort();
+ }
+
+ /*
+ * 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) {
+ reg = env->kvm_timer_state;
+ ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(state), ®);
+ if (ret) {
+ abort();
+ }
+ }
+
+ env->kvm_timer_dirty = false;
+}
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 13/14] 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: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/kvm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 59c537b1cb..943d733539 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -40,6 +40,7 @@
#include "kvm_riscv.h"
#include "sbi_ecall_interface.h"
#include "chardev/char-fe.h"
+#include "sysemu/runstate.h"
static __u64 kvm_riscv_reg_id(__u64 type, __u64 idx)
{
@@ -448,6 +449,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu)
return cpu->cpu_index;
}
+static void kvm_riscv_vm_state_change(void *opaque, int 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)
{
}
@@ -459,6 +471,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
RISCVCPU *cpu = RISCV_CPU(cs);
__u64 id;
+ qemu_add_vm_change_state_handler(kvm_riscv_vm_state_change, cs);
+
id = kvm_riscv_reg_id(KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
ret = kvm_get_one_reg(cs, id, &isa);
if (ret) {
--
2.19.1
4:21 a.m.
New subject: [PATCH RFC v3 14/14] target/riscv: Support virtual time context synchronization
Add virtual time context description to vmstate_riscv_cpu. After cpu being
loaded, virtual time context is updated to KVM.
Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com>
---
target/riscv/cpu.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index b698f4adbb..c6b207d201 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -496,11 +496,19 @@ static void riscv_cpu_init(Object *obj)
cpu_set_cpustate_pointers(cpu);
}
+static int cpu_post_load(void *opaque, int version_id)
+{
+ RISCVCPU *cpu = opaque;
+ cpu->env.kvm_timer_dirty = true;
+ return 0;
+}
+
#ifndef CONFIG_USER_ONLY
static const VMStateDescription vmstate_riscv_cpu = {
.name = "cpu",
.version_id = 1,
.minimum_version_id = 1,
+ .post_load = cpu_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINTTL_ARRAY(env.gpr, RISCVCPU, 32),
VMSTATE_UINT64_ARRAY(env.fpr, RISCVCPU, 32),
@@ -514,6 +522,9 @@ static const VMStateDescription vmstate_riscv_cpu = {
VMSTATE_UINTTL(env.sbadaddr, RISCVCPU),
VMSTATE_UINTTL(env.mip, RISCVCPU),
VMSTATE_UINTTL(env.satp, RISCVCPU),
+ 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()
}
};
--
2.19.1
1527
days inactive
1527
days old
14 comments
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participants (1)
-
Yifei Jiang