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selftests: KVM: SVM: Add vmcall test

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L2 guest calls vmcall and L1 checks the exit status does
correspond.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Tested-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Eric Auger
2020-02-06 11:47:10 +01:00
committed by Paolo Bonzini
parent 20ba262f86
commit 1ea2cc0cd7
2 changed files with 80 additions and 0 deletions
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1
tools/testing/selftests/kvm/Makefile
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@@ -26,6 +26,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test
TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test
TEST_GEN_PROGS_x86_64 += clear_dirty_log_test TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
TEST_GEN_PROGS_x86_64 += dirty_log_test TEST_GEN_PROGS_x86_64 += dirty_log_test
TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus

79
tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c Normal file
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@@ -0,0 +1,79 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* svm_vmcall_test
*
* Copyright (C) 2020, Red Hat, Inc.
*
* Nested SVM testing: VMCALL
*/
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#include "svm_util.h"
#define VCPU_ID 5
static struct kvm_vm *vm;
static void l2_guest_code(struct svm_test_data *svm)
{
__asm__ __volatile__("vmcall");
}
static void l1_guest_code(struct svm_test_data *svm)
{
#define L2_GUEST_STACK_SIZE 64
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
struct vmcb *vmcb = svm->vmcb;
/* Prepare for L2 execution. */
generic_svm_setup(svm, l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
run_guest(vmcb, svm->vmcb_gpa);
GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
GUEST_DONE();
}
int main(int argc, char *argv[])
{
vm_vaddr_t svm_gva;
nested_svm_check_supported();
vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
vcpu_alloc_svm(vm, &svm_gva);
vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
for (;;) {
volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
struct ucall uc;
vcpu_run(vm, VCPU_ID);
TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
"Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
run->exit_reason,
exit_reason_str(run->exit_reason));
switch (get_ucall(vm, VCPU_ID, &uc)) {
case UCALL_ABORT:
TEST_ASSERT(false, "%s",
(const char *)uc.args[0]);
/* NOT REACHED */
case UCALL_SYNC:
break;
case UCALL_DONE:
goto done;
default:
TEST_ASSERT(false,
"Unknown ucall 0x%x.", uc.cmd);
}
}
done:
kvm_vm_free(vm);
return 0;
}