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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <libgen.h>
#include <err.h>
#include <errno.h>
#include <strings.h>
#include <sys/vmm.h>
#include <sys/vmm_dev.h>
#include <vmmapi.h>
#include "common.h"
int
main(int argc, char *argv[])
{
const char *suite_name = basename(argv[0]);
struct vmctx *ctx;
ctx = create_test_vm(suite_name);
if (ctx == NULL) {
perror("could open test VM");
return (EXIT_FAILURE);
}
int vmfd = vm_get_device_fd(ctx);
struct vm_vcpu_cpuid_config cfg = { 0 };
struct vcpu_cpuid_entry *entries = NULL;
if (ioctl(vmfd, VM_GET_CPUID, &cfg) != 0) {
err(EXIT_FAILURE, "ioctl(VM_GET_CPUID) failed");
}
if (cfg.vvcc_flags != VCC_FLAG_LEGACY_HANDLING) {
errx(EXIT_FAILURE,
"cpuid handling did not default to legacy-style");
}
cfg.vvcc_flags = ~VCC_FLAG_LEGACY_HANDLING;
if (ioctl(vmfd, VM_SET_CPUID, &cfg) == 0) {
errx(EXIT_FAILURE,
"ioctl(VM_SET_CPUID) did not reject invalid flags");
}
entries = calloc(VMM_MAX_CPUID_ENTRIES + 1,
sizeof (struct vcpu_cpuid_entry));
if (entries == NULL) {
errx(EXIT_FAILURE, "could not allocate cpuid entries");
}
cfg.vvcc_flags = VCC_FLAG_LEGACY_HANDLING;
cfg.vvcc_nent = 1;
cfg.vvcc_entries = entries;
if (ioctl(vmfd, VM_SET_CPUID, &cfg) == 0) {
errx(EXIT_FAILURE,
"ioctl(VM_SET_CPUID) did not reject entries when "
"legacy-style handling was requested");
}
cfg.vvcc_flags = 0;
cfg.vvcc_nent = VMM_MAX_CPUID_ENTRIES + 1;
if (ioctl(vmfd, VM_SET_CPUID, &cfg) == 0) {
errx(EXIT_FAILURE,
"ioctl(VM_SET_CPUID) did not reject excessive entry count");
}
cfg.vvcc_nent = 1;
entries[0].vce_flags = ~0;
if (ioctl(vmfd, VM_SET_CPUID, &cfg) == 0) {
errx(EXIT_FAILURE,
"ioctl(VM_SET_CPUID) did not invalid entry flags");
}
entries[0].vce_flags = 0;
/* Actually set some entries to use for GET_CPUID testing */
const uint_t valid_entries = (VMM_MAX_CPUID_ENTRIES / 2);
for (uint_t i = 0; i < valid_entries; i++) {
entries[i].vce_function = i;
}
cfg.vvcc_nent = valid_entries;
if (ioctl(vmfd, VM_SET_CPUID, &cfg) != 0) {
err(EXIT_FAILURE,
"ioctl(VM_SET_CPUID) unable to set valid entries");
}
/* Try with no entries buffer */
bzero(&cfg, sizeof (cfg));
if (ioctl(vmfd, VM_GET_CPUID, &cfg) == 0 || errno != E2BIG) {
errx(EXIT_FAILURE,
"ioctl(VM_GET_CPUID) did not fail absent buffer");
}
if (cfg.vvcc_nent != valid_entries) {
errx(EXIT_FAILURE,
"ioctl(VM_GET_CPUID) did not emit entry count "
"(expected %u, got %u)", valid_entries, cfg.vvcc_nent);
}
/* Try with too-small entries buffer */
cfg.vvcc_nent = 1;
cfg.vvcc_entries = entries;
bzero(entries, valid_entries * sizeof (struct vcpu_cpuid_entry));
if (ioctl(vmfd, VM_GET_CPUID, &cfg) == 0 || errno != E2BIG) {
errx(EXIT_FAILURE,
"ioctl(VM_GET_CPUID) did not fail too-small buffer");
}
if (cfg.vvcc_nent != valid_entries) {
errx(EXIT_FAILURE,
"ioctl(VM_GET_CPUID) did not emit entry count "
"(expected %u, got %u)", valid_entries, cfg.vvcc_nent);
}
/* Try with adequate entries buffer */
cfg.vvcc_nent = valid_entries;
if (ioctl(vmfd, VM_GET_CPUID, &cfg) != 0) {
err(EXIT_FAILURE, "ioctl(VM_GET_CPUID) failed");
}
if (cfg.vvcc_nent != valid_entries) {
errx(EXIT_FAILURE,
"ioctl(VM_GET_CPUID) did not emit entry count "
"(expected %u, got %u)", valid_entries, cfg.vvcc_nent);
}
for (uint_t i = 0; i < valid_entries; i++) {
if (entries[i].vce_function != i) {
errx(EXIT_FAILURE, "unexpected entry contents");
}
}
/*
* The legacy handling is simply using the host values with certain
* modifications (masking, etc) applied. The base leaf should be
* exactly the same as we read from the host.
*
* Since a bhyve compat header has an inline-asm cpuid wrapper, use that
* for now for querying the host
*/
struct vm_legacy_cpuid legacy = { 0 };
if (ioctl(vmfd, VM_LEGACY_CPUID, &legacy) != 0) {
err(EXIT_FAILURE, "ioctl(VM_CPUID_LEGACY) failed");
}
uint32_t basic_cpuid[4];
cpuid_count(0, 0, basic_cpuid);
if (basic_cpuid[0] != legacy.vlc_eax ||
basic_cpuid[1] != legacy.vlc_ebx ||
basic_cpuid[2] != legacy.vlc_ecx ||
basic_cpuid[3] != legacy.vlc_edx) {
errx(EXIT_FAILURE, "legacy cpuid mismatch");
}
vm_destroy(ctx);
(void) printf("%s\tPASS\n", suite_name);
return (EXIT_SUCCESS);
}
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