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KVM: selftests: Extend vmx_close_while_nested_test to cover SVM

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Add SVM L1 code to run the nested guest, and allow the test to run with
SVM as well as VMX.

Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20251021074736.1324328-4-yosry.ahmed@linux.dev
[sean: rename to "nested_close_kvm_test" to provide nested_* sorting]
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Yosry Ahmed
2025-10-21 07:47:16 +00:00
committed by Sean Christopherson
parent 9e4ce7a89e
commit 0a9eb2afa1
2 changed files with 34 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/selftests/kvm/Makefile.kvm
View File

@@ -88,6 +88,7 @@ TEST_GEN_PROGS_x86 += x86/kvm_pv_test
TEST_GEN_PROGS_x86 += x86/kvm_buslock_test
TEST_GEN_PROGS_x86 += x86/monitor_mwait_test
TEST_GEN_PROGS_x86 += x86/msrs_test
TEST_GEN_PROGS_x86 += x86/nested_close_kvm_test
TEST_GEN_PROGS_x86 += x86/nested_emulation_test
TEST_GEN_PROGS_x86 += x86/nested_exceptions_test
TEST_GEN_PROGS_x86 += x86/platform_info_test
@@ -111,7 +112,6 @@ TEST_GEN_PROGS_x86 += x86/ucna_injection_test
TEST_GEN_PROGS_x86 += x86/userspace_io_test
TEST_GEN_PROGS_x86 += x86/userspace_msr_exit_test
TEST_GEN_PROGS_x86 += x86/vmx_apic_access_test
TEST_GEN_PROGS_x86 += x86/vmx_close_while_nested_test
TEST_GEN_PROGS_x86 += x86/vmx_dirty_log_test
TEST_GEN_PROGS_x86 += x86/vmx_exception_with_invalid_guest_state
TEST_GEN_PROGS_x86 += x86/vmx_msrs_test

42
tools/testing/selftests/kvm/x86/vmx_close_while_nested_test.c → tools/testing/selftests/kvm/x86/nested_close_kvm_test.c
View File

@@ -1,7 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* vmx_close_while_nested
*
* Copyright (C) 2019, Red Hat, Inc.
*
* Verify that nothing bad happens if a KVM user exits with open
@@ -12,6 +10,7 @@
#include "kvm_util.h"
#include "processor.h"
#include "vmx.h"
#include "svm_util.h"
#include <string.h>
#include <sys/ioctl.h>
@@ -22,6 +21,8 @@ enum {
PORT_L0_EXIT = 0x2000,
};
#define L2_GUEST_STACK_SIZE 64
static void l2_guest_code(void)
{
/* Exit to L0 */
@@ -29,9 +30,8 @@ static void l2_guest_code(void)
: : [port] "d" (PORT_L0_EXIT) : "rax");
}
static void l1_guest_code(struct vmx_pages *vmx_pages)
static void l1_vmx_code(struct vmx_pages *vmx_pages)
{
#define L2_GUEST_STACK_SIZE 64
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
@@ -45,19 +45,43 @@ static void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_ASSERT(0);
}
static void l1_svm_code(struct svm_test_data *svm)
{
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
/* Prepare the VMCB for L2 execution. */
generic_svm_setup(svm, l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
run_guest(svm->vmcb, svm->vmcb_gpa);
GUEST_ASSERT(0);
}
static void l1_guest_code(void *data)
{
if (this_cpu_has(X86_FEATURE_VMX))
l1_vmx_code(data);
else
l1_svm_code(data);
}
int main(int argc, char *argv[])
{
vm_vaddr_t vmx_pages_gva;
vm_vaddr_t guest_gva;
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX) ||
kvm_cpu_has(X86_FEATURE_SVM));
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
/* Allocate VMX pages and shared descriptors (vmx_pages). */
vcpu_alloc_vmx(vm, &vmx_pages_gva);
vcpu_args_set(vcpu, 1, vmx_pages_gva);
if (kvm_cpu_has(X86_FEATURE_VMX))
vcpu_alloc_vmx(vm, &guest_gva);
else
vcpu_alloc_svm(vm, &guest_gva);
vcpu_args_set(vcpu, 1, guest_gva);
for (;;) {
volatile struct kvm_run *run = vcpu->run;