// 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_invalid_bsp(struct kvm_vm *vm)
{
unsigned long max_vcpu_id = vm_check_cap(vm, KVM_CAP_MAX_VCPU_ID);
int r;
if (max_vcpu_id) {
r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(max_vcpu_id + 1 ));
TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID > MAX should fail" );
}
r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(1 L << 32 ));
TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID[63:32]!=0 should fail" );
}
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);
test_set_invalid_bsp(vm);
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();
}
Messung V0.5 in Prozent C=89 H=95 G=91
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-10-12)
¤
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