mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 02:30:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

KVM: arm64: Bump guest PSCI version to 1.1

Browse source 
Expose PSCI version v1.1 to the guest by default. The only difference
for now is that an updated version number is reported by PSCI_VERSION.

Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220221153524.15397-2-will@kernel.org
This commit is contained in:
Will Deacon 2022-02-21 15:35:22 +00:00 committed by Marc Zyngier
parent dfd42facf1
commit 512865d83f
2 changed files with 11 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

12
arch/arm64/kvm/psci.c
View file

@ -305,16 +305,19 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu)
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;
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);
@ -393,8 +396,10 @@ 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)) {
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:
@ -511,6 +516,7 @@ 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;

3
include/kvm/arm_psci.h
View file

@ -13,8 +13,9 @@
#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)
#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)
#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)
#define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1)
#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0
#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1
/*
* We need the KVM pointer independently from the vcpu as we can call