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head/usr.sbin/cpucontrol/amd10h.c

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/*-
* Copyright (c) 2012 Andriy Gapon <avg@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/ioccom.h>
#include <sys/cpuctl.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include "cpucontrol.h"
#include "amd.h"
int
amd10h_probe(int fd)
{
char vendor[13];
cpuctl_cpuid_args_t idargs;
uint32_t family;
uint32_t signature;
int error;
idargs.level = 0;
error = ioctl(fd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
return (1);
}
((uint32_t *)vendor)[0] = idargs.data[1];
((uint32_t *)vendor)[1] = idargs.data[3];
((uint32_t *)vendor)[2] = idargs.data[2];
vendor[12] = '\0';
if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
return (1);
idargs.level = 1;
error = ioctl(fd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
return (1);
}
signature = idargs.data[0];
family = ((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff);
if (family < 0x10)
return (1);
return (0);
}
/*
* NB: the format of microcode update files is not documented by AMD.
* It has been reverse engineered from studying Coreboot, illumos and Linux
* source code.
*/
void
amd10h_update(const char *dev, const char *path)
{
struct stat st;
cpuctl_cpuid_args_t idargs;
cpuctl_msr_args_t msrargs;
cpuctl_update_args_t args;
const amd_10h_fw_header_t *fw_header;
const amd_10h_fw_header_t *selected_fw;
const equiv_cpu_entry_t *equiv_cpu_table;
const section_header_t *section_header;
const container_header_t *container_header;
const uint8_t *fw_data;
uint8_t *fw_image;
size_t fw_size;
size_t selected_size;
uint32_t revision;
uint32_t new_rev;
uint32_t signature;
uint16_t equiv_id;
int fd, devfd;
unsigned int i;
int error;
assert(path);
assert(dev);
fd = -1;
fw_image = MAP_FAILED;
devfd = open(dev, O_RDWR);
if (devfd < 0) {
WARN(0, "could not open %s for writing", dev);
return;
}
idargs.level = 1;
error = ioctl(devfd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
goto done;
}
signature = idargs.data[0];
msrargs.msr = 0x0000008b;
error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
if (error < 0) {
WARN(0, "ioctl(%s)", dev);
goto done;
}
revision = (uint32_t)msrargs.data;
WARNX(1, "found cpu family %#x model %#x "
"stepping %#x extfamily %#x extmodel %#x.",
(signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
(signature >> 0) & 0x0f, (signature >> 20) & 0xff,
(signature >> 16) & 0x0f);
WARNX(1, "microcode revision %#x", revision);
/*
* Open the firmware file.
*/
fd = open(path, O_RDONLY, 0);
if (fd < 0) {
WARN(0, "open(%s)", path);
goto done;
}
error = fstat(fd, &st);
if (error != 0) {
WARN(0, "fstat(%s)", path);
goto done;
}
if (st.st_size < 0 || (size_t)st.st_size <
(sizeof(*container_header) + sizeof(*section_header))) {
WARNX(2, "file too short: %s", path);
goto done;
}
fw_size = st.st_size;
/*
* mmap the whole image.
*/
fw_image = (uint8_t *)mmap(NULL, st.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
if (fw_image == MAP_FAILED) {
WARN(0, "mmap(%s)", path);
goto done;
}
fw_data = fw_image;
container_header = (const container_header_t *)fw_data;
if (container_header->magic != AMD_10H_MAGIC) {
WARNX(2, "%s is not a valid amd firmware: bad magic", path);
goto done;
}
fw_data += sizeof(*container_header);
fw_size -= sizeof(*container_header);
section_header = (const section_header_t *)fw_data;
if (section_header->type != AMD_10H_EQUIV_TABLE_TYPE) {
WARNX(2, "%s is not a valid amd firmware: "
"first section is not CPU equivalence table", path);
goto done;
}
if (section_header->size == 0) {
WARNX(2, "%s is not a valid amd firmware: "
"first section is empty", path);
goto done;
}
fw_data += sizeof(*section_header);
fw_size -= sizeof(*section_header);
if (section_header->size > fw_size) {
WARNX(2, "%s is not a valid amd firmware: "
"file is truncated", path);
goto done;
}
if (section_header->size < sizeof(*equiv_cpu_table)) {
WARNX(2, "%s is not a valid amd firmware: "
"first section is too short", path);
goto done;
}
equiv_cpu_table = (const equiv_cpu_entry_t *)fw_data;
fw_data += section_header->size;
fw_size -= section_header->size;
equiv_id = 0;
for (i = 0; equiv_cpu_table[i].installed_cpu != 0; i++) {
if (signature == equiv_cpu_table[i].installed_cpu) {
equiv_id = equiv_cpu_table[i].equiv_cpu;
WARNX(3, "equiv_id: %x", equiv_id);
break;
}
}
if (equiv_id == 0) {
WARNX(2, "CPU is not found in the equivalence table");
goto done;
}
selected_fw = NULL;
selected_size = 0;
while (fw_size >= sizeof(*section_header)) {
section_header = (const section_header_t *)fw_data;
fw_data += sizeof(*section_header);
fw_size -= sizeof(*section_header);
if (section_header->type != AMD_10H_uCODE_TYPE) {
WARNX(2, "%s is not a valid amd firmware: "
"section has incorret type", path);
goto done;
}
if (section_header->size > fw_size) {
WARNX(2, "%s is not a valid amd firmware: "
"file is truncated", path);
goto done;
}
if (section_header->size < sizeof(*fw_header)) {
WARNX(2, "%s is not a valid amd firmware: "
"section is too short", path);
goto done;
}
fw_header = (const amd_10h_fw_header_t *)fw_data;
fw_data += section_header->size;
fw_size -= section_header->size;
if (fw_header->processor_rev_id != equiv_id)
continue; /* different cpu */
if (fw_header->patch_id <= revision)
continue; /* not newer revision */
if (fw_header->nb_dev_id != 0 || fw_header->sb_dev_id != 0) {
WARNX(2, "Chipset-specific microcode is not supported");
}
WARNX(3, "selecting revision: %x", fw_header->patch_id);
revision = fw_header->patch_id;
selected_fw = fw_header;
selected_size = section_header->size;
}
if (fw_size != 0) {
WARNX(2, "%s is not a valid amd firmware: "
"file is truncated", path);
goto done;
}
if (selected_fw != NULL) {
WARNX(1, "selected ucode size is %zu", selected_size);
fprintf(stderr, "%s: updating cpu %s to revision %#x... ",
path, dev, revision);
args.data = __DECONST(void *, selected_fw);
args.size = selected_size;
error = ioctl(devfd, CPUCTL_UPDATE, &args);
if (error < 0) {
fprintf(stderr, "failed.\n");
warn("ioctl()");
goto done;
}
fprintf(stderr, "done.\n");
}
msrargs.msr = 0x0000008b;
error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
if (error < 0) {
WARN(0, "ioctl(%s)", dev);
goto done;
}
new_rev = (uint32_t)msrargs.data;
if (new_rev != revision)
WARNX(0, "revision after update %#x", new_rev);
done:
if (fd >= 0)
close(fd);
if (devfd >= 0)
close(devfd);
if (fw_image != MAP_FAILED)
if (munmap(fw_image, st.st_size) != 0)
warn("munmap(%s)", path);
return;
}