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[PATCH RFC v6 11/12] target/riscv: Implement virtual time adjusting with
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From: |
Yifei Jiang |
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Subject: |
[PATCH RFC v6 11/12] target/riscv: Implement virtual time adjusting with vm state changing |
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Date: |
Tue, 17 Aug 2021 11:24:46 +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>
---
target/riscv/kvm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index d1ab4b1247..60c61ba924 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 uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t
idx)
{
@@ -447,6 +448,17 @@ 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)
{
}
@@ -459,6 +471,8 @@ 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
- [PATCH RFC v6 00/12] Add riscv kvm accel support, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 01/12] linux-header: Update linux/kvm.h, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 05/12] target/riscv: Implement kvm_arch_put_registers, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 02/12] target/riscv: Add target/riscv/kvm.c to place the public kvm interface, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 03/12] target/riscv: Implement function kvm_arch_init_vcpu, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 07/12] target/riscv: Support setting external interrupt by KVM, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 09/12] target/riscv: Add host cpu type, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 06/12] target/riscv: Support start kernel directly by KVM, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 04/12] target/riscv: Implement kvm_arch_get_registers, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 11/12] target/riscv: Implement virtual time adjusting with vm state changing,
Yifei Jiang <=
- [PATCH RFC v6 12/12] target/riscv: Support virtual time context synchronization, Yifei Jiang, 2021/08/16
- [PATCH RFC v6 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer, Yifei Jiang, 2021/08/16