[PATCH v4 03/21] KVM: arm64: Support SDEI_VERSION hypercall
From: Gavin Shan <hidden>
Date: 2021-08-15 00:14:47
Also in:
kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
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 <redacted> --- 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