This supports SDEI_1_0_FN_SDEI_EVENT_CONTEXT hypercall by implementing
kvm_sdei_hypercall_context(). If there is valid context on the current
vCPU and the register index isn't out of scope, the register values are
returned. Otherwise, errno is returned.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index cf6908e87edd..0c5a16e8cbac 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -590,6 +590,35 @@ static unsigned long kvm_sdei_hypercall_enable(struct kvm_vcpu *vcpu,
return ret;
}
+static unsigned long kvm_sdei_hypercall_context(struct kvm_vcpu *vcpu)
+{
+ struct user_pt_regs *regs;
+ unsigned long index = smccc_get_arg1(vcpu);
+ unsigned long ret = SDEI_SUCCESS;
+
+ if (index > 17) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto out;
+ }
+
+ spin_lock(&vcpu->arch.sdei_lock);
+
+ if (vcpu->arch.sdei_critical_event) {
+ regs = &vcpu->arch.sdei_critical_regs;
+ } else if (vcpu->arch.sdei_normal_event) {
+ regs = &vcpu->arch.sdei_normal_regs;
+ } else {
+ ret = SDEI_DENIED;
+ goto unlock;
+ }
+
+ ret = regs->regs[index];
+unlock:
+ spin_unlock(&vcpu->arch.sdei_lock);
+out:
+ return ret;
+}
+
static unsigned long kvm_sdei_hypercall_complete(struct kvm_vcpu *vcpu,
bool resume)
{
@@ -1075,7 +1104,7 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
ret = kvm_sdei_hypercall_enable(vcpu, false);
break;
case SDEI_1_0_FN_SDEI_EVENT_CONTEXT:
- ret = SDEI_NOT_SUPPORTED;
+ ret = kvm_sdei_hypercall_context(vcpu);
break;
case SDEI_1_0_FN_SDEI_EVENT_COMPLETE:
has_result = false;
--
2.23.0
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