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[PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM
From: |
Yifei Jiang |
Subject: |
[PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM |
Date: |
Thu, 3 Dec 2020 20:47:02 +0800 |
If vcpu's frequency is specified by cpu option 'frequency', it
will be set into KVM by KVM_SET_ONE_REG ioctl. Otherwise, vcpu's
frequency will follow KVM by KVM_GET_ONE_REG ioctl.
Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1@huawei.com>
---
target/riscv/kvm.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 1e16d24544..3499efd4eb 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -409,6 +409,8 @@ int kvm_arch_get_registers(CPUState *cs)
int kvm_arch_put_registers(CPUState *cs, int level)
{
int ret = 0;
+ RISCVCPU *cpu = RISCV_CPU(cs);
+ CPURISCVState *env = &cpu->env;
ret = kvm_riscv_put_regs_core(cs);
if (ret) {
@@ -425,6 +427,10 @@ int kvm_arch_put_registers(CPUState *cs, int level)
return ret;
}
+ if (env->frequency) {
+ ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+ }
+
return ret;
}
@@ -481,6 +487,17 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
env->misa = isa;
+ /*
+ * Synchronize vcpu's frequency with KVM. If vcpu's frequency is specified
+ * by cpu option 'frequency', this will be set to KVM. Otherwise, vcpu's
+ * frequency will follow KVM.
+ */
+ if (env->user_frequency) {
+ ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+ } else {
+ ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+ }
+
return ret;
}
--
2.19.1
- Re: [PATCH RFC v4 03/15] target/riscv: Implement function kvm_arch_init_vcpu, (continued)
- [PATCH RFC v4 08/15] target/riscv: Handle KVM_EXIT_RISCV_SBI exit, 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 11/15] target/riscv: Implement virtual time adjusting with vm state changing, Yifei Jiang, 2020/12/03
- [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 <=
- [PATCH RFC v4 13/15] target/riscv: Introduce dynamic time frequency for virt machine, 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 15/15] target/riscv: Add time frequency migration support, Yifei Jiang, 2020/12/03