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Diffstat (limited to 'arch/arm64/kvm/psci.c')
-rw-r--r--arch/arm64/kvm/psci.c87
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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-09 01:22:29 +0300