diff options
Diffstat (limited to 'arch/arm64/kvm/psci.c')
-rw-r--r-- | arch/arm64/kvm/psci.c | 87 |
1 files changed, 70 insertions, 17 deletions
diff --git a/arch/arm64/kvm/psci.c b/arch/arm64/kvm/psci.c index 3eae32876897..372da09a2fab 100644 --- a/arch/arm64/kvm/psci.c +++ b/arch/arm64/kvm/psci.c @@ -46,8 +46,7 @@ static unsigned long kvm_psci_vcpu_suspend(struct kvm_vcpu *vcpu) * specification (ARM DEN 0022A). This means all suspend states * for KVM will preserve the register state. */ - kvm_vcpu_halt(vcpu); - kvm_clear_request(KVM_REQ_UNHALT, vcpu); + kvm_vcpu_wfi(vcpu); return PSCI_RET_SUCCESS; } @@ -85,7 +84,7 @@ 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_psci_version(source_vcpu, kvm) != KVM_ARM_PSCI_0_1) + if (kvm_psci_version(source_vcpu) != KVM_ARM_PSCI_0_1) return PSCI_RET_ALREADY_ON; else return PSCI_RET_INVALID_PARAMS; @@ -162,7 +161,7 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) return PSCI_0_2_AFFINITY_LEVEL_OFF; } -static void kvm_prepare_system_event(struct kvm_vcpu *vcpu, u32 type) +static void kvm_prepare_system_event(struct kvm_vcpu *vcpu, u32 type, u64 flags) { unsigned long i; struct kvm_vcpu *tmp; @@ -182,17 +181,24 @@ static void kvm_prepare_system_event(struct kvm_vcpu *vcpu, u32 type) memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event)); vcpu->run->system_event.type = type; + vcpu->run->system_event.flags = flags; vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; } static void kvm_psci_system_off(struct kvm_vcpu *vcpu) { - kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_SHUTDOWN); + kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_SHUTDOWN, 0); } static void kvm_psci_system_reset(struct kvm_vcpu *vcpu) { - kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_RESET); + kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_RESET, 0); +} + +static void kvm_psci_system_reset2(struct kvm_vcpu *vcpu) +{ + kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_RESET, + KVM_SYSTEM_EVENT_RESET_FLAG_PSCI_RESET2); } static void kvm_psci_narrow_to_32bit(struct kvm_vcpu *vcpu) @@ -305,24 +311,27 @@ out: return ret; } -static int kvm_psci_1_0_call(struct kvm_vcpu *vcpu) +static int kvm_psci_1_x_call(struct kvm_vcpu *vcpu, u32 minor) { u32 psci_fn = smccc_get_function(vcpu); - u32 feature; + u32 arg; unsigned long val; int ret = 1; + if (minor > 1) + return -EINVAL; + switch(psci_fn) { case PSCI_0_2_FN_PSCI_VERSION: - val = KVM_ARM_PSCI_1_0; + val = minor == 0 ? KVM_ARM_PSCI_1_0 : KVM_ARM_PSCI_1_1; break; case PSCI_1_0_FN_PSCI_FEATURES: - feature = smccc_get_arg1(vcpu); - val = kvm_psci_check_allowed_function(vcpu, feature); + arg = smccc_get_arg1(vcpu); + val = kvm_psci_check_allowed_function(vcpu, arg); if (val) break; - switch(feature) { + switch(arg) { case PSCI_0_2_FN_PSCI_VERSION: case PSCI_0_2_FN_CPU_SUSPEND: case PSCI_0_2_FN64_CPU_SUSPEND: @@ -338,11 +347,36 @@ static int kvm_psci_1_0_call(struct kvm_vcpu *vcpu) case ARM_SMCCC_VERSION_FUNC_ID: val = 0; break; + case PSCI_1_1_FN_SYSTEM_RESET2: + case PSCI_1_1_FN64_SYSTEM_RESET2: + if (minor >= 1) { + val = 0; + break; + } + fallthrough; default: val = PSCI_RET_NOT_SUPPORTED; break; } break; + case PSCI_1_1_FN_SYSTEM_RESET2: + kvm_psci_narrow_to_32bit(vcpu); + fallthrough; + case PSCI_1_1_FN64_SYSTEM_RESET2: + if (minor >= 1) { + arg = smccc_get_arg1(vcpu); + + if (arg <= PSCI_1_1_RESET_TYPE_SYSTEM_WARM_RESET || + arg >= PSCI_1_1_RESET_TYPE_VENDOR_START) { + kvm_psci_system_reset2(vcpu); + vcpu_set_reg(vcpu, 0, PSCI_RET_INTERNAL_FAILURE); + return 0; + } + + val = PSCI_RET_INVALID_PARAMS; + break; + } + fallthrough; default: return kvm_psci_0_2_call(vcpu); } @@ -392,21 +426,23 @@ static int kvm_psci_0_1_call(struct kvm_vcpu *vcpu) */ int kvm_psci_call(struct kvm_vcpu *vcpu) { - switch (kvm_psci_version(vcpu, vcpu->kvm)) { + switch (kvm_psci_version(vcpu)) { + case KVM_ARM_PSCI_1_1: + return kvm_psci_1_x_call(vcpu, 1); case KVM_ARM_PSCI_1_0: - return kvm_psci_1_0_call(vcpu); + return kvm_psci_1_x_call(vcpu, 0); case KVM_ARM_PSCI_0_2: return kvm_psci_0_2_call(vcpu); case KVM_ARM_PSCI_0_1: return kvm_psci_0_1_call(vcpu); default: return -EINVAL; - }; + } } int kvm_arm_get_fw_num_regs(struct kvm_vcpu *vcpu) { - return 3; /* PSCI version and two workaround registers */ + return 4; /* PSCI version and three workaround registers */ } int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) @@ -420,6 +456,9 @@ int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) if (put_user(KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2, uindices++)) return -EFAULT; + if (put_user(KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3, uindices++)) + return -EFAULT; + return 0; } @@ -459,6 +498,17 @@ static int get_kernel_wa_level(u64 regid) case SPECTRE_VULNERABLE: return KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL; } + break; + case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3: + switch (arm64_get_spectre_bhb_state()) { + case SPECTRE_VULNERABLE: + return KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_NOT_AVAIL; + case SPECTRE_MITIGATED: + return KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_AVAIL; + case SPECTRE_UNAFFECTED: + return KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_NOT_REQUIRED; + } + return KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_NOT_AVAIL; } return -EINVAL; @@ -471,10 +521,11 @@ int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) switch (reg->id) { case KVM_REG_ARM_PSCI_VERSION: - val = kvm_psci_version(vcpu, vcpu->kvm); + val = kvm_psci_version(vcpu); break; case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1: case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2: + case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3: val = get_kernel_wa_level(reg->id) & KVM_REG_FEATURE_LEVEL_MASK; break; default: @@ -511,6 +562,7 @@ int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) return 0; case KVM_ARM_PSCI_0_2: case KVM_ARM_PSCI_1_0: + case KVM_ARM_PSCI_1_1: if (!wants_02) return -EINVAL; vcpu->kvm->arch.psci_version = val; @@ -520,6 +572,7 @@ int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) } case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1: + case KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3: if (val & ~KVM_REG_FEATURE_LEVEL_MASK) return -EINVAL; |