1:52 a.m.
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/boot.c | 11 +++++++++++
hw/riscv/virt.c | 7 +++++++
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 | 13 +++++++++++++
target/riscv/kvm_riscv.h | 24 ++++++++++++++++++++++++
target/riscv/meson.build | 2 +-
9 files changed, 93 insertions(+), 1 deletion(-)
create mode 100644 target/riscv/kvm-stub.c
create mode 100644 target/riscv/kvm_riscv.h
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index 0d38bb7426..b9741a647d 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -290,3 +290,14 @@ 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 c0dc69ff33..4a1fca139c 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -728,6 +728,13 @@ 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
+ */
+ 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 11a21dd584..28d838cc29 100644
--- a/include/hw/riscv/boot.h
+++ b/include/hw/riscv/boot.h
@@ -51,5 +51,6 @@ 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 7d6ed80f6b..dd34ab4978 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 */
@@ -361,6 +363,12 @@ static void riscv_cpu_reset(DeviceState *dev)
cs->exception_index = 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 0a33d387ba..a489d94187 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -243,6 +243,9 @@ 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 9d1441952a..79c931acb4 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(CPURISCVState *env, __u64 type, __u64 idx)
{
@@ -440,6 +441,18 @@ 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 */
+}
+
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 32afd6e882..0f63e3824d 100644
--- a/target/riscv/meson.build
+++ b/target/riscv/meson.build
@@ -23,7 +23,7 @@ riscv_ss.add(files(
'vector_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