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// SPDX-License-Identifier: GPL-2.0
/*
* Test that KVM_SET_BOOT_CPU_ID works as intended
*
* Copyright (C) 2020, Red Hat, Inc.
*/
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#include "apic.h"
static void guest_bsp_vcpu(void *arg)
{
GUEST_SYNC(1);
GUEST_ASSERT_NE(get_bsp_flag(), 0);
GUEST_DONE();
}
static void guest_not_bsp_vcpu(void *arg)
{
GUEST_SYNC(1);
GUEST_ASSERT_EQ(get_bsp_flag(), 0);
GUEST_DONE();
}
static void test_set_bsp_busy(struct kvm_vcpu *vcpu, const char *msg)
{
int r = __vm_ioctl(vcpu->vm, KVM_SET_BOOT_CPU_ID,
(void *)(unsigned long)vcpu->id);
TEST_ASSERT(r == -1 && errno == EBUSY, "KVM_SET_BOOT_CPU_ID set %s", msg);
}
static void run_vcpu(struct kvm_vcpu *vcpu)
{
struct ucall uc;
int stage;
for (stage = 0; stage < 2; stage++) {
vcpu_run(vcpu);
switch (get_ucall(vcpu, &uc)) {
case UCALL_SYNC:
TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
uc.args[1] == stage + 1,
"Stage %d: Unexpected register values vmexit, got %lx",
stage + 1, (ulong)uc.args[1]);
test_set_bsp_busy(vcpu, "while running vm");
break;
case UCALL_DONE:
TEST_ASSERT(stage == 1,
"Expected GUEST_DONE in stage 2, got stage %d",
stage);
break;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
default:
TEST_ASSERT(false, "Unexpected exit: %s",
exit_reason_str(vcpu->run->exit_reason));
}
}
}
static struct kvm_vm *create_vm(uint32_t nr_vcpus, uint32_t bsp_vcpu_id,
struct kvm_vcpu *vcpus[])
{
struct kvm_vm *vm;
uint32_t i;
vm = vm_create(nr_vcpus);
vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(unsigned long)bsp_vcpu_id);
for (i = 0; i < nr_vcpus; i++)
vcpus[i] = vm_vcpu_add(vm, i, i == bsp_vcpu_id ? guest_bsp_vcpu :
guest_not_bsp_vcpu);
return vm;
}
static void run_vm_bsp(uint32_t bsp_vcpu_id)
{
struct kvm_vcpu *vcpus[2];
struct kvm_vm *vm;
vm = create_vm(ARRAY_SIZE(vcpus), bsp_vcpu_id, vcpus);
run_vcpu(vcpus[0]);
run_vcpu(vcpus[1]);
kvm_vm_free(vm);
}
static void check_set_bsp_busy(void)
{
struct kvm_vcpu *vcpus[2];
struct kvm_vm *vm;
vm = create_vm(ARRAY_SIZE(vcpus), 0, vcpus);
test_set_bsp_busy(vcpus[1], "after adding vcpu");
run_vcpu(vcpus[0]);
run_vcpu(vcpus[1]);
test_set_bsp_busy(vcpus[1], "to a terminated vcpu");
kvm_vm_free(vm);
}
int main(int argc, char *argv[])
{
TEST_REQUIRE(kvm_has_cap(KVM_CAP_SET_BOOT_CPU_ID));
run_vm_bsp(0);
run_vm_bsp(1);
run_vm_bsp(0);
check_set_bsp_busy();
}
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