diff options
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c')
-rw-r--r-- | tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c deleted file mode 100644 index 745b708c2d3b..000000000000 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ /dev/null @@ -1,190 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Test for x86 KVM_CAP_HYPERV_CPUID - * - * Copyright (C) 2018, Red Hat, Inc. - * - * This work is licensed under the terms of the GNU GPL, version 2. - * - */ - -#define _GNU_SOURCE /* for program_invocation_short_name */ -#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 "vmx.h" - -#define VCPU_ID 0 - -static void guest_code(void) -{ -} - -static bool smt_possible(void) -{ - char buf[16]; - FILE *f; - bool res = true; - - f = fopen("/sys/devices/system/cpu/smt/control", "r"); - if (f) { - if (fread(buf, sizeof(*buf), sizeof(buf), f) > 0) { - if (!strncmp(buf, "forceoff", 8) || - !strncmp(buf, "notsupported", 12)) - res = false; - } - fclose(f); - } - - return res; -} - -static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries, - bool evmcs_enabled) -{ - int i; - int nent = 9; - u32 test_val; - - if (evmcs_enabled) - nent += 1; /* 0x4000000A */ - - TEST_ASSERT(hv_cpuid_entries->nent == nent, - "KVM_GET_SUPPORTED_HV_CPUID should return %d entries" - " with evmcs=%d (returned %d)", - nent, evmcs_enabled, hv_cpuid_entries->nent); - - for (i = 0; i < hv_cpuid_entries->nent; i++) { - struct kvm_cpuid_entry2 *entry = &hv_cpuid_entries->entries[i]; - - TEST_ASSERT((entry->function >= 0x40000000) && - (entry->function <= 0x40000082), - "function %x is our of supported range", - entry->function); - - TEST_ASSERT(evmcs_enabled || (entry->function != 0x4000000A), - "0x4000000A leaf should not be reported"); - - TEST_ASSERT(entry->index == 0, - ".index field should be zero"); - - TEST_ASSERT(entry->flags == 0, - ".flags field should be zero"); - - TEST_ASSERT(!entry->padding[0] && !entry->padding[1] && - !entry->padding[2], "padding should be zero"); - - switch (entry->function) { - case 0x40000000: - test_val = 0x40000082; - - TEST_ASSERT(entry->eax == test_val, - "Wrong max leaf report in 0x40000000.EAX: %x" - " (evmcs=%d)", - entry->eax, evmcs_enabled - ); - break; - case 0x40000004: - test_val = entry->eax & (1UL << 18); - - TEST_ASSERT(!!test_val == !smt_possible(), - "NoNonArchitecturalCoreSharing bit" - " doesn't reflect SMT setting"); - break; - } - - /* - * If needed for debug: - * fprintf(stdout, - * "CPUID%lx EAX=0x%lx EBX=0x%lx ECX=0x%lx EDX=0x%lx\n", - * entry->function, entry->eax, entry->ebx, entry->ecx, - * entry->edx); - */ - } - -} - -void test_hv_cpuid_e2big(struct kvm_vm *vm) -{ - static struct kvm_cpuid2 cpuid = {.nent = 0}; - int ret; - - ret = _vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, &cpuid); - - TEST_ASSERT(ret == -1 && errno == E2BIG, - "KVM_GET_SUPPORTED_HV_CPUID didn't fail with -E2BIG when" - " it should have: %d %d", ret, errno); -} - - -struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(struct kvm_vm *vm) -{ - int nent = 20; /* should be enough */ - static struct kvm_cpuid2 *cpuid; - - cpuid = malloc(sizeof(*cpuid) + nent * sizeof(struct kvm_cpuid_entry2)); - - if (!cpuid) { - perror("malloc"); - abort(); - } - - cpuid->nent = nent; - - vcpu_ioctl(vm, VCPU_ID, KVM_GET_SUPPORTED_HV_CPUID, cpuid); - - return cpuid; -} - - -int main(int argc, char *argv[]) -{ - struct kvm_vm *vm; - int rv, stage; - struct kvm_cpuid2 *hv_cpuid_entries; - bool evmcs_enabled; - - /* Tell stdout not to buffer its content */ - setbuf(stdout, NULL); - - rv = kvm_check_cap(KVM_CAP_HYPERV_CPUID); - if (!rv) { - print_skip("KVM_CAP_HYPERV_CPUID not supported"); - exit(KSFT_SKIP); - } - - for (stage = 0; stage < 3; stage++) { - evmcs_enabled = false; - - vm = vm_create_default(VCPU_ID, 0, guest_code); - switch (stage) { - case 0: - test_hv_cpuid_e2big(vm); - continue; - case 1: - break; - case 2: - if (!nested_vmx_supported() || - !kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) { - print_skip("Enlightened VMCS is unsupported"); - continue; - } - vcpu_enable_evmcs(vm, VCPU_ID); - evmcs_enabled = true; - break; - } - - hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm); - test_hv_cpuid(hv_cpuid_entries, evmcs_enabled); - free(hv_cpuid_entries); - kvm_vm_free(vm); - } - - return 0; -} |