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KVM: selftests: Add vmgexit helper

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Abstract rep vmmcall coded into the vmgexit helper for the sev
library.

No functional change intended.

Signed-off-by: Pratik R. Sampat <prsampat@amd.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Link: https://lore.kernel.org/r/20250305230000.231025-4-prsampat@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Pratik R. Sampat 2025-03-05 16:59:53 -06:00 committed by Sean Christopherson
parent 68ed692e39
commit c4e1a848d7
2 changed files with 6 additions and 1 deletions
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5
tools/testing/selftests/kvm/include/x86/sev.h
View File

@ -71,6 +71,11 @@ kvm_static_assert(SEV_RET_SUCCESS == 0);
void sev_vm_init(struct kvm_vm *vm);
void sev_es_vm_init(struct kvm_vm *vm);
static inline void vmgexit(void)
{
__asm__ __volatile__("rep; vmmcall");
}
static inline void sev_register_encrypted_memory(struct kvm_vm *vm,
struct userspace_mem_region *region)
{

2
tools/testing/selftests/kvm/x86/sev_smoke_test.c
View File

@ -27,7 +27,7 @@ static void guest_sev_es_code(void)
* force "termination" to signal "done" via the GHCB MSR protocol.
*/
wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ);
__asm__ __volatile__("rep; vmmcall");
vmgexit();
}
static void guest_sev_code(void)