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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2021, Red Hat Inc.
*
* Generic tests for KVM CPUID set/get ioctls
*/
#include <asm/kvm_para.h>
#include <linux/kvm_para.h>
#include <stdint.h>
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#define VCPU_ID 0
/* CPUIDs known to differ */
struct {
u32 function;
u32 index;
} mangled_cpuids[] = {
{.function = 0xd, .index = 0},
};
static void test_guest_cpuids(struct kvm_cpuid2 *guest_cpuid)
{
int i;
u32 eax, ebx, ecx, edx;
for (i = 0; i < guest_cpuid->nent; i++) {
eax = guest_cpuid->entries[i].function;
ecx = guest_cpuid->entries[i].index;
cpuid(&eax, &ebx, &ecx, &edx);
GUEST_ASSERT(eax == guest_cpuid->entries[i].eax &&
ebx == guest_cpuid->entries[i].ebx &&
ecx == guest_cpuid->entries[i].ecx &&
edx == guest_cpuid->entries[i].edx);
}
}
static void test_cpuid_40000000(struct kvm_cpuid2 *guest_cpuid)
{
u32 eax = 0x40000000, ebx, ecx = 0, edx;
cpuid(&eax, &ebx, &ecx, &edx);
GUEST_ASSERT(eax == 0x40000001);
}
static void guest_main(struct kvm_cpuid2 *guest_cpuid)
{
GUEST_SYNC(1);
test_guest_cpuids(guest_cpuid);
GUEST_SYNC(2);
test_cpuid_40000000(guest_cpuid);
GUEST_DONE();
}
static bool is_cpuid_mangled(struct kvm_cpuid_entry2 *entrie)
{
int i;
for (i = 0; i < sizeof(mangled_cpuids); i++) {
if (mangled_cpuids[i].function == entrie->function &&
mangled_cpuids[i].index == entrie->index)
return true;
}
return false;
}
static void check_cpuid(struct kvm_cpuid2 *cpuid, struct kvm_cpuid_entry2 *entrie)
{
int i;
for (i = 0; i < cpuid->nent; i++) {
if (cpuid->entries[i].function == entrie->function &&
cpuid->entries[i].index == entrie->index) {
if (is_cpuid_mangled(entrie))
return;
TEST_ASSERT(cpuid->entries[i].eax == entrie->eax &&
cpuid->entries[i].ebx == entrie->ebx &&
cpuid->entries[i].ecx == entrie->ecx &&
cpuid->entries[i].edx == entrie->edx,
"CPUID 0x%x.%x differ: 0x%x:0x%x:0x%x:0x%x vs 0x%x:0x%x:0x%x:0x%x",
entrie->function, entrie->index,
cpuid->entries[i].eax, cpuid->entries[i].ebx,
cpuid->entries[i].ecx, cpuid->entries[i].edx,
entrie->eax, entrie->ebx, entrie->ecx, entrie->edx);
return;
}
}
TEST_ASSERT(false, "CPUID 0x%x.%x not found", entrie->function, entrie->index);
}
static void compare_cpuids(struct kvm_cpuid2 *cpuid1, struct kvm_cpuid2 *cpuid2)
{
int i;
for (i = 0; i < cpuid1->nent; i++)
check_cpuid(cpuid2, &cpuid1->entries[i]);
for (i = 0; i < cpuid2->nent; i++)
check_cpuid(cpuid1, &cpuid2->entries[i]);
}
static void run_vcpu(struct kvm_vm *vm, uint32_t vcpuid, int stage)
{
struct ucall uc;
_vcpu_run(vm, vcpuid);
switch (get_ucall(vm, vcpuid, &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]);
return;
case UCALL_DONE:
return;
case UCALL_ABORT:
TEST_ASSERT(false, "%s at %s:%ld\n\tvalues: %#lx, %#lx", (const char *)uc.args[0],
__FILE__, uc.args[1], uc.args[2], uc.args[3]);
default:
TEST_ASSERT(false, "Unexpected exit: %s",
exit_reason_str(vcpu_state(vm, vcpuid)->exit_reason));
}
}
struct kvm_cpuid2 *vcpu_alloc_cpuid(struct kvm_vm *vm, vm_vaddr_t *p_gva, struct kvm_cpuid2 *cpuid)
{
int size = sizeof(*cpuid) + cpuid->nent * sizeof(cpuid->entries[0]);
vm_vaddr_t gva = vm_vaddr_alloc(vm, size,
getpagesize(), 0, 0);
struct kvm_cpuid2 *guest_cpuids = addr_gva2hva(vm, gva);
memcpy(guest_cpuids, cpuid, size);
*p_gva = gva;
return guest_cpuids;
}
int main(void)
{
struct kvm_cpuid2 *supp_cpuid, *cpuid2;
vm_vaddr_t cpuid_gva;
struct kvm_vm *vm;
int stage;
vm = vm_create_default(VCPU_ID, 0, guest_main);
supp_cpuid = kvm_get_supported_cpuid();
cpuid2 = vcpu_get_cpuid(vm, VCPU_ID);
compare_cpuids(supp_cpuid, cpuid2);
vcpu_alloc_cpuid(vm, &cpuid_gva, cpuid2);
vcpu_args_set(vm, VCPU_ID, 1, cpuid_gva);
for (stage = 0; stage < 3; stage++)
run_vcpu(vm, VCPU_ID, stage);
kvm_vm_free(vm);
}
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