/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2006, 2008 Stanislav Sedov <stas@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 <assert.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include <err.h> #include <errno.h> #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 "cpucontrol.h" #include "intel.h" #define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */ int intel_probe(int fd) { char vendor[13]; int error; cpuctl_cpuid_args_t 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, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0) return (1); return (0); } void intel_update(const struct ucode_update_params *params) { int devfd; const char *dev, *path; const uint32_t *fw_image; int have_ext_table; uint32_t sum; unsigned int i; size_t payload_size; const intel_fw_header_t *fw_header; const intel_cpu_signature_t *ext_table; const intel_ext_header_t *ext_header; uint32_t sig, signature, flags; int32_t revision; ssize_t ext_size; size_t ext_table_size; const void *fw_data; size_t data_size, total_size; cpuctl_msr_args_t msrargs = { .msr = MSR_BIOS_SIGN, .data = 0, }; cpuctl_cpuid_args_t idargs = { .level = 1, /* Signature. */ }; cpuctl_update_args_t args; int error; dev = params->dev_path; path = params->fw_path; devfd = params->devfd; fw_image = params->fwimage; assert(path); assert(dev); ext_table = NULL; ext_header = NULL; error = ioctl(devfd, CPUCTL_WRMSR, &msrargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); goto fail; } error = ioctl(devfd, CPUCTL_CPUID, &idargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); goto fail; } signature = idargs.data[0]; msrargs.msr = MSR_IA32_PLATFORM_ID; error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); goto fail; } /* * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50. */ flags = 1 << ((msrargs.data >> 50) & 7); msrargs.msr = MSR_BIOS_SIGN; error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); if (error < 0) { WARN(0, "ioctl(%s)", dev); goto fail; } revision = msrargs.data >> 32; /* Revision in the high dword. */ WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.", (signature >> 12) & 0x03, (signature >> 8) & 0x0f, (signature >> 4) & 0x0f, (signature >> 0) & 0x0f); /* * Open firmware image. */ if (params->fwsize < sizeof(*fw_header)) { WARNX(2, "file too short: %s", path); goto fail; } fw_header = (const intel_fw_header_t *)fw_image; if (fw_header->header_version != INTEL_HEADER_VERSION || fw_header->loader_revision != INTEL_LOADER_REVISION) { WARNX(2, "%s is not a valid intel firmware: version mismatch", path); goto fail; } /* * According to spec, if data_size == 0, then size of ucode = 2000. */ if (fw_header->data_size == 0) data_size = DEFAULT_UCODE_SIZE; else data_size = fw_header->data_size; if (fw_header->total_size == 0) total_size = data_size + sizeof(*fw_header); else total_size = fw_header->total_size; if (total_size > params->fwsize) { WARNX(2, "file too short: %s", path); goto fail; } payload_size = data_size + sizeof(*fw_header); /* * Check the primary checksum. */ sum = 0; for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) sum += *((const uint32_t *)fw_image + i); if (sum != 0) { WARNX(2, "%s: update data checksum invalid", path); goto fail; } /* * Check if there is an extended signature table. */ ext_size = total_size - payload_size; have_ext_table = 0; if (ext_size > (signed)sizeof(*ext_header)) { ext_header = (const intel_ext_header_t *) ((const char *)fw_image + payload_size); ext_table = (const intel_cpu_signature_t *)(ext_header + 1); /* * Check the extended table size. */ ext_table_size = sizeof(*ext_header) + ext_header->sig_count * sizeof(*ext_table); if (ext_table_size + payload_size > total_size) { WARNX(2, "%s: broken extended signature table", path); goto no_table; } /* * Check the extended table signature. */ sum = 0; for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++) sum += *((const uint32_t *)ext_header + i); if (sum != 0) { WARNX(2, "%s: extended signature table checksum invalid", path); goto no_table; } have_ext_table = 1; } no_table: fw_data = fw_header + 1; /* Pointer to the update data. */ /* * Check if the given image is ok for this cpu. */ if (signature == fw_header->cpu_signature && (flags & fw_header->cpu_flags) != 0) goto matched; else if (have_ext_table != 0) { for (i = 0; i < ext_header->sig_count; i++) { sig = ext_table[i].cpu_signature; if (signature == sig && (flags & ext_table[i].cpu_flags) != 0) goto matched; } } else goto fail; matched: if (revision >= fw_header->revision) { WARNX(1, "skipping %s of rev %#x: up to date", path, fw_header->revision); goto fail; } fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", path, dev, revision, fw_header->revision); args.data = __DECONST(void *, fw_data); args.size = data_size; error = ioctl(devfd, CPUCTL_UPDATE, &args); if (error < 0) { error = errno; fprintf(stderr, "failed.\n"); errno = error; WARN(0, "ioctl()"); goto fail; } fprintf(stderr, "done.\n"); fail: return; }