[PATCH v4 03/21] KVM: arm64: Support SDEI_VERSION hypercall

Gavin Shan
2021-08-15T00:14:47Z

This supports SDEI_VERSION hypercall by returning v1.0.0 simply
when the functionality is supported on the VM and vCPU.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/kvm/sdei.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index ab330b74a965..aa9485f076a9 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -70,6 +70,22 @@ static void kvm_sdei_remove_vcpu_events(struct kvm_vcpu *vcpu)
}
}

+static unsigned long kvm_sdei_hypercall_version(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
+ unsigned long ret = SDEI_NOT_SUPPORTED;
+
+ if (!(ksdei && vsdei))
+ return ret;
+
+ /* v1.0.0 */
+ ret = (1UL << SDEI_VERSION_MAJOR_SHIFT);
+
+ return ret;
+}
+
int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
{
u32 func = smccc_get_function(vcpu);
@@ -78,6 +94,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)

switch (func) {
case SDEI_1_0_FN_SDEI_VERSION:
+ ret = kvm_sdei_hypercall_version(vcpu);
+ break;
case SDEI_1_0_FN_SDEI_EVENT_REGISTER:
case SDEI_1_0_FN_SDEI_EVENT_ENABLE:
case SDEI_1_0_FN_SDEI_EVENT_DISABLE:
--
2.23.0