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[PATCH v5 11/13] target/riscv: Implement virtual time adjusting with vm
From: |
Yifei Jiang |
Subject: |
[PATCH v5 11/13] target/riscv: Implement virtual time adjusting with vm state changing |
Date: |
Wed, 12 Jan 2022 16:13:27 +0800 |
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@huawei.com>
Signed-off-by: Mingwang Li <limingwang@huawei.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/kvm.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index a43d5a2988..e6b7cb6d4d 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 "migration/migration.h"
+#include "sysemu/runstate.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx)
@@ -378,6 +379,18 @@ 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 +403,8 @@ 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);
--
2.19.1
- [PATCH v5 02/13] target/riscv: Add target/riscv/kvm.c to place the public kvm interface, (continued)
- [PATCH v5 02/13] target/riscv: Add target/riscv/kvm.c to place the public kvm interface, Yifei Jiang, 2022/01/12
- [PATCH v5 03/13] target/riscv: Implement function kvm_arch_init_vcpu, Yifei Jiang, 2022/01/12
- [PATCH v5 04/13] target/riscv: Implement kvm_arch_get_registers, Yifei Jiang, 2022/01/12
- [PATCH v5 05/13] target/riscv: Implement kvm_arch_put_registers, Yifei Jiang, 2022/01/12
- [PATCH v5 06/13] target/riscv: Support start kernel directly by KVM, Yifei Jiang, 2022/01/12
- [PATCH v5 07/13] target/riscv: Support setting external interrupt by KVM, Yifei Jiang, 2022/01/12
- [PATCH v5 08/13] target/riscv: Handle KVM_EXIT_RISCV_SBI exit, Yifei Jiang, 2022/01/12
- [PATCH v5 09/13] target/riscv: Add host cpu type, Yifei Jiang, 2022/01/12
- [PATCH v5 10/13] target/riscv: Add kvm_riscv_get/put_regs_timer, Yifei Jiang, 2022/01/12
- [PATCH v5 11/13] target/riscv: Implement virtual time adjusting with vm state changing,
Yifei Jiang <=
- [PATCH v5 12/13] target/riscv: Support virtual time context synchronization, Yifei Jiang, 2022/01/12
- [PATCH v5 13/13] target/riscv: enable riscv kvm accel, Yifei Jiang, 2022/01/12
- Re: [PATCH v5 00/13] Add riscv kvm accel support, Alistair Francis, 2022/01/17