So we can add a new "suspend" power state, replace power_off with mp_state in struct kvm_vcpu_arch. Factor the cpu_off() function while we're here.
Signed-off-by: Jean-Philippe Brucker jean-philippe@linaro.org --- arch/arm64/include/asm/kvm_host.h | 6 ++++-- arch/arm64/kvm/arm.c | 29 +++++++++++++++-------------- arch/arm64/kvm/psci.c | 19 ++++++------------- 3 files changed, 25 insertions(+), 29 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 7cd7d5c8c4bc..55a04f4d5919 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -340,8 +340,8 @@ struct kvm_vcpu_arch { u32 mdscr_el1; } guest_debug_preserved;
- /* vcpu power-off state */ - bool power_off; + /* vcpu power state (runnable, stopped, halted) */ + u32 mp_state;
/* Don't run the guest (internal implementation need) */ bool pause; @@ -720,6 +720,8 @@ int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); +void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu); +bool kvm_arm_vcpu_is_off(struct kvm_vcpu *vcpu);
/* Guest/host FPSIMD coordination helpers */ int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 1cb39c0803a4..e4a8bf1b638b 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -435,21 +435,22 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) vcpu->cpu = -1; }
-static void vcpu_power_off(struct kvm_vcpu *vcpu) +void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu) { - vcpu->arch.power_off = true; + vcpu->arch.mp_state = KVM_MP_STATE_STOPPED; kvm_make_request(KVM_REQ_SLEEP, vcpu); kvm_vcpu_kick(vcpu); }
+bool kvm_arm_vcpu_is_off(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.mp_state == KVM_MP_STATE_STOPPED; +} + int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state) { - if (vcpu->arch.power_off) - mp_state->mp_state = KVM_MP_STATE_STOPPED; - else - mp_state->mp_state = KVM_MP_STATE_RUNNABLE; - + mp_state->mp_state = vcpu->arch.mp_state; return 0; }
@@ -460,10 +461,10 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
switch (mp_state->mp_state) { case KVM_MP_STATE_RUNNABLE: - vcpu->arch.power_off = false; + vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; break; case KVM_MP_STATE_STOPPED: - vcpu_power_off(vcpu); + kvm_arm_vcpu_power_off(vcpu); break; default: ret = -EINVAL; @@ -483,7 +484,7 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) { bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF); return ((irq_lines || kvm_vgic_vcpu_pending_irq(v)) - && !v->arch.power_off && !v->arch.pause); + && !kvm_arm_vcpu_is_off(v) && !v->arch.pause); }
bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) @@ -643,10 +644,10 @@ static void vcpu_req_sleep(struct kvm_vcpu *vcpu) struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu);
rcuwait_wait_event(wait, - (!vcpu->arch.power_off) &&(!vcpu->arch.pause), + !kvm_arm_vcpu_is_off(vcpu) && !vcpu->arch.pause, TASK_INTERRUPTIBLE);
- if (vcpu->arch.power_off || vcpu->arch.pause) { + if (kvm_arm_vcpu_is_off(vcpu) || vcpu->arch.pause) { /* Awaken to handle a signal, request we sleep again later. */ kvm_make_request(KVM_REQ_SLEEP, vcpu); } @@ -1073,9 +1074,9 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, * Handle the "start in power-off" case. */ if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) - vcpu_power_off(vcpu); + kvm_arm_vcpu_power_off(vcpu); else - vcpu->arch.power_off = false; + vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
return 0; } diff --git a/arch/arm64/kvm/psci.c b/arch/arm64/kvm/psci.c index db4056ecccfd..24b4a2265dbd 100644 --- a/arch/arm64/kvm/psci.c +++ b/arch/arm64/kvm/psci.c @@ -52,13 +52,6 @@ static unsigned long kvm_psci_vcpu_suspend(struct kvm_vcpu *vcpu) return PSCI_RET_SUCCESS; }
-static void kvm_psci_vcpu_off(struct kvm_vcpu *vcpu) -{ - vcpu->arch.power_off = true; - kvm_make_request(KVM_REQ_SLEEP, vcpu); - kvm_vcpu_kick(vcpu); -} - static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) { struct vcpu_reset_state *reset_state; @@ -78,7 +71,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) */ if (!vcpu) return PSCI_RET_INVALID_PARAMS; - if (!vcpu->arch.power_off) { + if (!kvm_arm_vcpu_is_off(vcpu)) { if (kvm_psci_version(source_vcpu, kvm) != KVM_ARM_PSCI_0_1) return PSCI_RET_ALREADY_ON; else @@ -107,7 +100,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) */ smp_wmb();
- vcpu->arch.power_off = false; + vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; kvm_vcpu_wake_up(vcpu);
return PSCI_RET_SUCCESS; @@ -142,7 +135,7 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) mpidr = kvm_vcpu_get_mpidr_aff(tmp); if ((mpidr & target_affinity_mask) == target_affinity) { matching_cpus++; - if (!tmp->arch.power_off) + if (!kvm_arm_vcpu_is_off(tmp)) return PSCI_0_2_AFFINITY_LEVEL_ON; } } @@ -168,7 +161,7 @@ static void kvm_prepare_system_event(struct kvm_vcpu *vcpu, u32 type) * re-initialized. */ kvm_for_each_vcpu(i, tmp, vcpu->kvm) - tmp->arch.power_off = true; + tmp->arch.mp_state = KVM_MP_STATE_STOPPED; kvm_make_all_cpus_request(vcpu->kvm, KVM_REQ_SLEEP);
memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event)); @@ -237,7 +230,7 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu) val = kvm_psci_vcpu_suspend(vcpu); break; case PSCI_0_2_FN_CPU_OFF: - kvm_psci_vcpu_off(vcpu); + kvm_arm_vcpu_power_off(vcpu); val = PSCI_RET_SUCCESS; break; case PSCI_0_2_FN_CPU_ON: @@ -350,7 +343,7 @@ static int kvm_psci_0_1_call(struct kvm_vcpu *vcpu)
switch (psci_fn) { case KVM_PSCI_FN_CPU_OFF: - kvm_psci_vcpu_off(vcpu); + kvm_arm_vcpu_power_off(vcpu); val = PSCI_RET_SUCCESS; break; case KVM_PSCI_FN_CPU_ON: