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selftests: kvm: extract common functionality out of smm_test.c

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2026-03-09 13:43:57 +01:00
parent be5fa8737d
commit c52b534f26
3 changed files with 45 additions and 25 deletions
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17
tools/testing/selftests/kvm/include/x86/smm.h Normal file
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@@ -0,0 +1,17 @@
// SPDX-License-Identifier: GPL-2.0-only
#ifndef SELFTEST_KVM_SMM_H
#define SELFTEST_KVM_SMM_H
#include "kvm_util.h"
#define SMRAM_SIZE 65536
#define SMRAM_MEMSLOT ((1 << 16) | 1)
#define SMRAM_PAGES (SMRAM_SIZE / PAGE_SIZE)
void setup_smram(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
uint64_t smram_gpa,
const void *smi_handler, size_t handler_size);
void inject_smi(struct kvm_vcpu *vcpu);
#endif /* SELFTEST_KVM_SMM_H */

26
tools/testing/selftests/kvm/lib/x86/processor.c
View File

@@ -8,6 +8,7 @@
#include "kvm_util.h"
#include "pmu.h"
#include "processor.h"
#include "smm.h"
#include "svm_util.h"
#include "sev.h"
#include "vmx.h"
@@ -1444,3 +1445,28 @@ bool kvm_arch_has_default_irqchip(void)
{
return true;
}
void setup_smram(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
uint64_t smram_gpa,
const void *smi_handler, size_t handler_size)
{
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, smram_gpa,
SMRAM_MEMSLOT, SMRAM_PAGES, 0);
TEST_ASSERT(vm_phy_pages_alloc(vm, SMRAM_PAGES, smram_gpa,
SMRAM_MEMSLOT) == smram_gpa,
"Could not allocate guest physical addresses for SMRAM");
memset(addr_gpa2hva(vm, smram_gpa), 0x0, SMRAM_SIZE);
memcpy(addr_gpa2hva(vm, smram_gpa) + 0x8000, smi_handler, handler_size);
vcpu_set_msr(vcpu, MSR_IA32_SMBASE, smram_gpa);
}
void inject_smi(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_events events;
vcpu_events_get(vcpu, &events);
events.smi.pending = 1;
events.flags |= KVM_VCPUEVENT_VALID_SMM;
vcpu_events_set(vcpu, &events);
}

27
tools/testing/selftests/kvm/x86/smm_test.c
View File

@@ -14,13 +14,11 @@
#include "test_util.h"
#include "kvm_util.h"
#include "smm.h"
#include "vmx.h"
#include "svm_util.h"
#define SMRAM_SIZE 65536
#define SMRAM_MEMSLOT ((1 << 16) | 1)
#define SMRAM_PAGES (SMRAM_SIZE / PAGE_SIZE)
#define SMRAM_GPA 0x1000000
#define SMRAM_STAGE 0xfe
@@ -113,18 +111,6 @@ static void guest_code(void *arg)
sync_with_host(DONE);
}
void inject_smi(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_events events;
vcpu_events_get(vcpu, &events);
events.smi.pending = 1;
events.flags |= KVM_VCPUEVENT_VALID_SMM;
vcpu_events_set(vcpu, &events);
}
int main(int argc, char *argv[])
{
vm_vaddr_t nested_gva = 0;
@@ -140,16 +126,7 @@ int main(int argc, char *argv[])
/* Create VM */
vm = vm_create_with_one_vcpu(&vcpu, guest_code);
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, SMRAM_GPA,
SMRAM_MEMSLOT, SMRAM_PAGES, 0);
TEST_ASSERT(vm_phy_pages_alloc(vm, SMRAM_PAGES, SMRAM_GPA, SMRAM_MEMSLOT)
== SMRAM_GPA, "could not allocate guest physical addresses?");
memset(addr_gpa2hva(vm, SMRAM_GPA), 0x0, SMRAM_SIZE);
memcpy(addr_gpa2hva(vm, SMRAM_GPA) + 0x8000, smi_handler,
sizeof(smi_handler));
vcpu_set_msr(vcpu, MSR_IA32_SMBASE, SMRAM_GPA);
setup_smram(vm, vcpu, SMRAM_GPA, smi_handler, sizeof(smi_handler));
if (kvm_has_cap(KVM_CAP_NESTED_STATE)) {
if (kvm_cpu_has(X86_FEATURE_SVM))