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KVM: selftests: nSVM: Set up MSR-Bitmap for SVM guests

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Similar to VMX, allocate memory for MSR-Bitmap and fill in 'msrpm_base_pa'
in VMCB. To use it, tests will need to set INTERCEPT_MSR_PROT interception
along with the required bits in the MSR-Bitmap.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220203104620.277031-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2022-02-03 11:46:18 +01:00 committed by Paolo Bonzini
parent 70e477d996
commit 0b815117da
2 changed files with 11 additions and 0 deletions
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5
tools/testing/selftests/kvm/include/x86_64/svm_util.h
View File

@ -28,6 +28,11 @@ struct svm_test_data {
struct vmcb_save_area *save_area; /* gva */
void *save_area_hva;
uint64_t save_area_gpa;
/* MSR-Bitmap */
void *msr; /* gva */
void *msr_hva;
uint64_t msr_gpa;
};
struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva);

6
tools/testing/selftests/kvm/lib/x86_64/svm.c
View File

@ -43,6 +43,11 @@ vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva)
svm->save_area_hva = addr_gva2hva(vm, (uintptr_t)svm->save_area);
svm->save_area_gpa = addr_gva2gpa(vm, (uintptr_t)svm->save_area);
svm->msr = (void *)vm_vaddr_alloc_page(vm);
svm->msr_hva = addr_gva2hva(vm, (uintptr_t)svm->msr);
svm->msr_gpa = addr_gva2gpa(vm, (uintptr_t)svm->msr);
memset(svm->msr_hva, 0, getpagesize());
*p_svm_gva = svm_gva;
return svm;
}
@ -106,6 +111,7 @@ void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_r
save->dbgctl = rdmsr(MSR_IA32_DEBUGCTLMSR);
ctrl->intercept = (1ULL << INTERCEPT_VMRUN) |
(1ULL << INTERCEPT_VMMCALL);
ctrl->msrpm_base_pa = svm->msr_gpa;
vmcb->save.rip = (u64)guest_rip;
vmcb->save.rsp = (u64)guest_rsp;