Commit 4b350aeb authored by Aaron Lewis's avatar Aaron Lewis Committed by Paolo Bonzini

tests: kvm: Add tests for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_CPU_ID

Signed-off-by: default avatarAaron Lewis <aaronlewis@google.com>
Reviewed-by: default avatarPeter Shier <pshier@google.com>
Reviewed-by: default avatarMarc Orr <marcorr@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 648a93c8
/x86_64/cr4_cpuid_sync_test /x86_64/cr4_cpuid_sync_test
/x86_64/evmcs_test /x86_64/evmcs_test
/x86_64/hyperv_cpuid /x86_64/hyperv_cpuid
/x86_64/kvm_create_max_vcpus
/x86_64/platform_info_test /x86_64/platform_info_test
/x86_64/set_sregs_test /x86_64/set_sregs_test
/x86_64/smm_test /x86_64/smm_test
......
...@@ -20,6 +20,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test ...@@ -20,6 +20,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test
TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid
TEST_GEN_PROGS_x86_64 += x86_64/vmx_close_while_nested_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_close_while_nested_test
TEST_GEN_PROGS_x86_64 += x86_64/smm_test TEST_GEN_PROGS_x86_64 += x86_64/smm_test
TEST_GEN_PROGS_x86_64 += x86_64/kvm_create_max_vcpus
TEST_GEN_PROGS_x86_64 += dirty_log_test TEST_GEN_PROGS_x86_64 += dirty_log_test
TEST_GEN_PROGS_x86_64 += clear_dirty_log_test TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
......
/*
* kvm_create_max_vcpus
*
* Copyright (C) 2019, Google LLC.
*
* This work is licensed under the terms of the GNU GPL, version 2.
*
* Test for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_VCPU_ID.
*/
#define _GNU_SOURCE /* for program_invocation_short_name */
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "test_util.h"
#include "kvm_util.h"
#include "asm/kvm.h"
#include "linux/kvm.h"
void test_vcpu_creation(int first_vcpu_id, int num_vcpus)
{
struct kvm_vm *vm;
int i;
printf("Testing creating %d vCPUs, with IDs %d...%d.\n",
num_vcpus, first_vcpu_id, first_vcpu_id + num_vcpus - 1);
vm = vm_create(VM_MODE_P52V48_4K, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
for (i = 0; i < num_vcpus; i++) {
int vcpu_id = first_vcpu_id + i;
/* This asserts that the vCPU was created. */
vm_vcpu_add(vm, vcpu_id, 0, 0);
}
kvm_vm_free(vm);
}
int main(int argc, char *argv[])
{
int kvm_max_vcpu_id = kvm_check_cap(KVM_CAP_MAX_VCPU_ID);
int kvm_max_vcpus = kvm_check_cap(KVM_CAP_MAX_VCPUS);
printf("KVM_CAP_MAX_VCPU_ID: %d\n", kvm_max_vcpu_id);
printf("KVM_CAP_MAX_VCPUS: %d\n", kvm_max_vcpus);
/*
* Upstream KVM prior to 4.8 does not support KVM_CAP_MAX_VCPU_ID.
* Userspace is supposed to use KVM_CAP_MAX_VCPUS as the maximum ID
* in this case.
*/
if (!kvm_max_vcpu_id)
kvm_max_vcpu_id = kvm_max_vcpus;
TEST_ASSERT(kvm_max_vcpu_id >= kvm_max_vcpus,
"KVM_MAX_VCPU_ID (%d) must be at least as large as KVM_MAX_VCPUS (%d).",
kvm_max_vcpu_id, kvm_max_vcpus);
test_vcpu_creation(0, kvm_max_vcpus);
if (kvm_max_vcpu_id > kvm_max_vcpus)
test_vcpu_creation(
kvm_max_vcpu_id - kvm_max_vcpus, kvm_max_vcpus);
return 0;
}
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