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[PATCH RFC v4 11/15] target/riscv: Implement virtual time adjusting with
From: |
Yifei Jiang |
Subject: |
[PATCH RFC v4 11/15] target/riscv: Implement virtual time adjusting with vm state changing |
Date: |
Thu, 3 Dec 2020 20:46:59 +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: Yipeng Yin <yinyipeng1@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 79228eb726..1e16d24544 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)
{
}
@@ -460,6 +472,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
CPURISCVState *env = &cpu->env;
__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
- Re: [PATCH RFC v4 07/15] hw/riscv: PLIC update external interrupt by KVM when kvm enabled, (continued)
- [PATCH RFC v4 04/15] target/riscv: Implement kvm_arch_get_registers, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 03/15] target/riscv: Implement function kvm_arch_init_vcpu, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 05/15] target/riscv: Implement kvm_arch_put_registers, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 06/15] target/riscv: Support start kernel directly by KVM, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 08/15] target/riscv: Handle KVM_EXIT_RISCV_SBI exit, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 11/15] target/riscv: Implement virtual time adjusting with vm state changing,
Yifei Jiang <=
- [PATCH RFC v4 10/15] target/riscv: Add kvm_riscv_get/put_regs_timer, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 09/15] target/riscv: Add host cpu type, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 12/15] target/riscv: Support virtual time context synchronization, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 13/15] target/riscv: Introduce dynamic time frequency for virt machine, Yifei Jiang, 2020/12/03
- [PATCH RFC v4 15/15] target/riscv: Add time frequency migration support, Yifei Jiang, 2020/12/03