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kvm: selftests: Add KVM_CAP_MAX_VCPU_ID cap test

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Basic test coverage of KVM_CAP_MAX_VCPU_ID cap.

This capability can be enabled before vCPU creation and only allowed
to set once. if assigned vcpu id is beyond KVM_CAP_MAX_VCPU_ID
capability, vCPU creation will fail.

Signed-off-by: Zeng Guang <guang.zeng@intel.com>
Message-Id: <20220422134456.26655-1-guang.zeng@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Zeng Guang 2022-04-22 21:44:56 +08:00 committed by Paolo Bonzini
parent 3587531638
commit 753dcf7a86
3 changed files with 56 additions and 0 deletions
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1
tools/testing/selftests/kvm/.gitignore vendored
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@ -25,6 +25,7 @@
/x86_64/hyperv_cpuid
/x86_64/hyperv_features
/x86_64/hyperv_svm_test
/x86_64/max_vcpuid_cap_test
/x86_64/mmio_warning_test
/x86_64/mmu_role_test
/x86_64/platform_info_test

1
tools/testing/selftests/kvm/Makefile
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@ -89,6 +89,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/xen_shinfo_test
TEST_GEN_PROGS_x86_64 += x86_64/xen_vmcall_test
TEST_GEN_PROGS_x86_64 += x86_64/sev_migrate_tests
TEST_GEN_PROGS_x86_64 += x86_64/amx_test
TEST_GEN_PROGS_x86_64 += x86_64/max_vcpuid_cap_test
TEST_GEN_PROGS_x86_64 += access_tracking_perf_test
TEST_GEN_PROGS_x86_64 += demand_paging_test
TEST_GEN_PROGS_x86_64 += dirty_log_test

54
tools/testing/selftests/kvm/x86_64/max_vcpuid_cap_test.c Normal file
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@ -0,0 +1,54 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* maximum APIC ID capability tests
*
* Copyright (C) 2022, Intel, Inc.
*
* Tests for getting/setting maximum APIC ID capability
*/
#include "kvm_util.h"
#include "../lib/kvm_util_internal.h"
#define MAX_VCPU_ID 2
int main(int argc, char *argv[])
{
struct kvm_vm *vm;
struct kvm_enable_cap cap = { 0 };
int ret;
vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
/* Get KVM_CAP_MAX_VCPU_ID cap supported in KVM */
ret = vm_check_cap(vm, KVM_CAP_MAX_VCPU_ID);
/* Try to set KVM_CAP_MAX_VCPU_ID beyond KVM cap */
cap.cap = KVM_CAP_MAX_VCPU_ID;
cap.args[0] = ret + 1;
ret = ioctl(vm->fd, KVM_ENABLE_CAP, &cap);
TEST_ASSERT(ret < 0,
"Unexpected success to enable KVM_CAP_MAX_VCPU_ID"
"beyond KVM cap!\n");
/* Set KVM_CAP_MAX_VCPU_ID */
cap.cap = KVM_CAP_MAX_VCPU_ID;
cap.args[0] = MAX_VCPU_ID;
ret = ioctl(vm->fd, KVM_ENABLE_CAP, &cap);
TEST_ASSERT(ret == 0,
"Unexpected failure to enable KVM_CAP_MAX_VCPU_ID!\n");
/* Try to set KVM_CAP_MAX_VCPU_ID again */
cap.args[0] = MAX_VCPU_ID + 1;
ret = ioctl(vm->fd, KVM_ENABLE_CAP, &cap);
TEST_ASSERT(ret < 0,
"Unexpected success to enable KVM_CAP_MAX_VCPU_ID again\n");
/* Create vCPU with id beyond KVM_CAP_MAX_VCPU_ID cap*/
ret = ioctl(vm->fd, KVM_CREATE_VCPU, MAX_VCPU_ID);
TEST_ASSERT(ret < 0,
"Unexpected success in creating a vCPU with VCPU ID out of range\n");
kvm_vm_free(vm);
return 0;
}