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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
147 lines
3.0 KiB
C
147 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Test that KVM_SET_BOOT_CPU_ID works as intended
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*
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* Copyright (C) 2020, Red Hat, Inc.
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include "test_util.h"
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#include "kvm_util.h"
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#include "processor.h"
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#include "apic.h"
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static void guest_bsp_vcpu(void *arg)
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{
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GUEST_SYNC(1);
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GUEST_ASSERT_NE(get_bsp_flag(), 0);
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GUEST_DONE();
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}
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static void guest_not_bsp_vcpu(void *arg)
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{
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GUEST_SYNC(1);
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GUEST_ASSERT_EQ(get_bsp_flag(), 0);
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GUEST_DONE();
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}
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static void test_set_invalid_bsp(struct kvm_vm *vm)
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{
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unsigned long max_vcpu_id = vm_check_cap(vm, KVM_CAP_MAX_VCPU_ID);
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int r;
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if (max_vcpu_id) {
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r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(max_vcpu_id + 1));
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TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID > MAX should fail");
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}
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r = __vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(1L << 32));
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TEST_ASSERT(r == -1 && errno == EINVAL, "BSP with ID[63:32]!=0 should fail");
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}
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static void test_set_bsp_busy(struct kvm_vcpu *vcpu, const char *msg)
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{
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int r = __vm_ioctl(vcpu->vm, KVM_SET_BOOT_CPU_ID,
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(void *)(unsigned long)vcpu->id);
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TEST_ASSERT(r == -1 && errno == EBUSY, "KVM_SET_BOOT_CPU_ID set %s", msg);
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}
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static void run_vcpu(struct kvm_vcpu *vcpu)
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{
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struct ucall uc;
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int stage;
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for (stage = 0; stage < 2; stage++) {
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vcpu_run(vcpu);
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switch (get_ucall(vcpu, &uc)) {
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case UCALL_SYNC:
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TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
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uc.args[1] == stage + 1,
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"Stage %d: Unexpected register values vmexit, got %lx",
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stage + 1, (ulong)uc.args[1]);
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test_set_bsp_busy(vcpu, "while running vm");
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break;
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case UCALL_DONE:
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TEST_ASSERT(stage == 1,
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"Expected GUEST_DONE in stage 2, got stage %d",
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stage);
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break;
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT(uc);
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default:
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TEST_ASSERT(false, "Unexpected exit: %s",
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exit_reason_str(vcpu->run->exit_reason));
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}
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}
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}
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static struct kvm_vm *create_vm(uint32_t nr_vcpus, uint32_t bsp_vcpu_id,
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struct kvm_vcpu *vcpus[])
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{
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struct kvm_vm *vm;
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uint32_t i;
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vm = vm_create(nr_vcpus);
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test_set_invalid_bsp(vm);
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vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *)(unsigned long)bsp_vcpu_id);
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for (i = 0; i < nr_vcpus; i++)
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vcpus[i] = vm_vcpu_add(vm, i, i == bsp_vcpu_id ? guest_bsp_vcpu :
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guest_not_bsp_vcpu);
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return vm;
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}
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static void run_vm_bsp(uint32_t bsp_vcpu_id)
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{
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struct kvm_vcpu *vcpus[2];
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struct kvm_vm *vm;
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vm = create_vm(ARRAY_SIZE(vcpus), bsp_vcpu_id, vcpus);
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run_vcpu(vcpus[0]);
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run_vcpu(vcpus[1]);
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kvm_vm_free(vm);
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}
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static void check_set_bsp_busy(void)
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{
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struct kvm_vcpu *vcpus[2];
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struct kvm_vm *vm;
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vm = create_vm(ARRAY_SIZE(vcpus), 0, vcpus);
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test_set_bsp_busy(vcpus[1], "after adding vcpu");
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run_vcpu(vcpus[0]);
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run_vcpu(vcpus[1]);
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test_set_bsp_busy(vcpus[1], "to a terminated vcpu");
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kvm_vm_free(vm);
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}
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int main(int argc, char *argv[])
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{
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TEST_REQUIRE(kvm_has_cap(KVM_CAP_SET_BOOT_CPU_ID));
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run_vm_bsp(0);
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run_vm_bsp(1);
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run_vm_bsp(0);
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check_set_bsp_busy();
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}
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