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Message-ID: <20231016132819.1002933-39-michael.roth@amd.com>
Date: Mon, 16 Oct 2023 08:28:07 -0500
From: Michael Roth <michael.roth@....com>
To: <kvm@...r.kernel.org>
CC: <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
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Subject: [PATCH v10 38/50] KVM: SEV: Add support for GHCB-based termination requests
GHCB version 2 adds support for a GHCB-based termination request that
a guest can issue when it reaches an error state and wishes to inform
the hypervisor that it should be terminated. Implement support for that
similarly to GHCB MSR-based termination requests that are already
available to SEV-ES guests via earlier versions of the GHCB protocol.
Signed-off-by: Michael Roth <michael.roth@....com>
---
arch/x86/kvm/svm/sev.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index e547adddacfa..9c38fe796e00 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3094,6 +3094,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
case SVM_VMGEXIT_UNSUPPORTED_EVENT:
case SVM_VMGEXIT_HV_FEATURES:
case SVM_VMGEXIT_PSC:
+ case SVM_VMGEXIT_TERM_REQUEST:
break;
default:
reason = GHCB_ERR_INVALID_EVENT;
@@ -3762,6 +3763,14 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
ret = 1;
break;
+ case SVM_VMGEXIT_TERM_REQUEST:
+ pr_info("SEV-ES guess requested termination: reason %#llx info %#llx\n",
+ control->exit_info_1, control->exit_info_1);
+ vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
+ vcpu->run->system_event.type = KVM_SYSTEM_EVENT_SEV_TERM;
+ vcpu->run->system_event.ndata = 1;
+ vcpu->run->system_event.data[0] = control->ghcb_gpa;
+ break;
case SVM_VMGEXIT_UNSUPPORTED_EVENT:
vcpu_unimpl(vcpu,
"vmgexit: unsupported event - exit_info_1=%#llx, exit_info_2=%#llx\n",
--
2.25.1
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