| /* intelmetool Dump interesting things about Management Engine even if hidden |
| * Copyright (C) 2014 Damien Zammit <damien@zamaudio.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <stdio.h> |
| #include <inttypes.h> |
| #include <stdlib.h> |
| #include <getopt.h> |
| #include <unistd.h> |
| |
| #ifdef __NetBSD__ |
| #include <machine/sysarch.h> |
| #endif |
| |
| #include "me.h" |
| #include "mmap.h" |
| #include "intelmetool.h" |
| |
| #define FD2 0x3428 |
| #define ME_COMMAND_DELAY 10000 |
| |
| extern int fd_mem; |
| int debug = 0; |
| |
| static uint32_t fd2 = 0; |
| static const int size = 0x4000; |
| static volatile uint8_t *rcba; |
| |
| static void dumpmem(uint8_t *phys, uint32_t size) |
| { |
| uint32_t i; |
| printf("Dumping cloned ME memory:\n"); |
| for (i = 0; i < size; i++) { |
| printf("%02X",*((uint8_t *) (phys + i))); |
| } |
| printf("\n"); |
| } |
| |
| static void zeroit(uint8_t *phys, uint32_t size) |
| { |
| uint32_t i; |
| for (i = 0; i < size; i++) { |
| *((uint8_t *) (phys + i)) = 0x00; |
| } |
| } |
| |
| static void dumpmemfile(uint8_t *phys, uint32_t size) |
| { |
| FILE *fp = fopen("medump.bin", "w"); |
| uint32_t i; |
| for (i = 0; i < size; i++) { |
| fprintf(fp, "%c", *((uint8_t *) (phys + i))); |
| } |
| fclose(fp); |
| } |
| |
| static void rehide_me() { |
| if (fd2 & 0x2) { |
| printf("Re-hiding MEI device..."); |
| fd2 = *(uint32_t *)(rcba + FD2); |
| *(uint32_t *)(rcba + FD2) = fd2 | 0x2; |
| printf("done\n"); |
| } |
| } |
| |
| /* You need >4GB total ram, in kernel cmdline, use 'mem=1000m' |
| * then this code will clone to absolute memory address 0xe0000000 |
| * which can be read using a mmap tool at that offset. |
| * Real ME memory is located around top of memory minus 64MB. (I think) |
| * so we avoid cloning to this part. |
| */ |
| static void dump_me_memory() { |
| uint32_t me_clone = 0x60000000; |
| uint8_t *dump; |
| |
| dump = map_physical_exact((off_t)me_clone, (void *)me_clone, 0x2000000); |
| zeroit(dump, 0x2000000); |
| printf("Send magic command for memory clone\n"); |
| |
| mei_reset(); |
| usleep(ME_COMMAND_DELAY); |
| void* ptr = &me_clone; |
| int err = mkhi_debug_me_memory(ptr); |
| |
| if (!err) { |
| printf("Wait a second..."); |
| usleep(ME_COMMAND_DELAY); |
| printf("done\n\nHere are the first bytes:\n"); |
| dumpmemfile(dump, 0x2000000); |
| //printf("Try reading 0x%zx with other mmap tool...\n" |
| // "Press enter to quit, you only get one chance to run this tool before reboot required for some reason\n", me_clone); |
| while (getc(stdin) != '\n') {}; |
| unmap_physical(dump, 0x2000000); |
| } |
| } |
| |
| static int pci_platform_scan() { |
| struct pci_access *pacc; |
| struct pci_dev *dev; |
| char namebuf[1024], *name; |
| |
| pacc = pci_alloc(); |
| pacc->method = PCI_ACCESS_I386_TYPE1; |
| |
| pci_init(pacc); |
| pci_scan_bus(pacc); |
| |
| for (dev=pacc->devices; dev; dev=dev->next) { |
| pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS); |
| name = pci_lookup_name(pacc, namebuf, sizeof(namebuf), |
| PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id); |
| if (dev->vendor_id == 0x8086) { |
| if (PCI_DEV_HAS_ME_DISABLE(dev->device_id)) { |
| printf(CGRN "Good news, you have a `%s` so ME is present but can be disabled, continuing...\n\n" RESET, name); |
| break; |
| } else if (PCI_DEV_HAS_ME_DIFFICULT(dev->device_id)) { |
| printf(CRED "Bad news, you have a `%s` so you have ME hardware on board and you can't control or disable it, continuing...\n\n" RESET, name); |
| break; |
| } else if (PCI_DEV_CAN_DISABLE_ME_IF_PRESENT(dev->device_id)) { |
| printf(CYEL "Not sure if ME hardware is present because you have a `%s`, but it is possible to disable it if you do, continuing...\n\n" RESET, name); |
| break; |
| } else if (PCI_DEV_ME_NOT_SURE(dev->device_id)) { |
| printf(CYEL "Found `%s`. Not sure whether you have ME hardware, exiting\n\n" RESET, name); |
| pci_cleanup(pacc); |
| return 1; |
| break; |
| } |
| } |
| } |
| |
| if (!PCI_DEV_HAS_ME_DISABLE(dev->device_id) && |
| !PCI_DEV_HAS_ME_DIFFICULT(dev->device_id) && |
| !PCI_DEV_CAN_DISABLE_ME_IF_PRESENT(dev->device_id) && |
| !PCI_DEV_ME_NOT_SURE(dev->device_id)) { |
| printf(CCYN "ME is not present on your board or unkown\n\n" RESET); |
| pci_cleanup(pacc); |
| return 1; |
| } |
| |
| pci_cleanup(pacc); |
| |
| return 0; |
| } |
| |
| static struct pci_dev *pci_me_interface_scan(char **name) { |
| struct pci_access *pacc; |
| struct pci_dev *dev; |
| char namebuf[1024]; |
| int me = 0; |
| |
| pacc = pci_alloc(); |
| pacc->method = PCI_ACCESS_I386_TYPE1; |
| |
| pci_init(pacc); |
| pci_scan_bus(pacc); |
| |
| for (dev=pacc->devices; dev; dev=dev->next) { |
| pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS); |
| *name = pci_lookup_name(pacc, namebuf, sizeof(namebuf), |
| PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id); |
| if (dev->vendor_id == 0x8086) { |
| if (PCI_DEV_HAS_SUPPORTED_ME(dev->device_id)) { |
| me = 1; |
| break; |
| } |
| } |
| } |
| |
| if (!me) { |
| rehide_me(); |
| |
| printf("MEI device not found\n"); |
| pci_cleanup(pacc); |
| return NULL; |
| } |
| |
| return dev; |
| } |
| |
| static int activate_me() { |
| struct pci_access *pacc; |
| struct pci_dev *sb; |
| uint32_t rcba_phys; |
| |
| pacc = pci_alloc(); |
| pacc->method = PCI_ACCESS_I386_TYPE1; |
| |
| pci_init(pacc); |
| pci_scan_bus(pacc); |
| |
| sb = pci_get_dev(pacc, 0, 0, 0x1f, 0); |
| if (!sb) { |
| printf("Uh oh, southbridge not on BDF(0:31:0), please report this error, exiting.\n"); |
| pci_cleanup(pacc); |
| return 1; |
| } |
| pci_fill_info(sb, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS); |
| |
| rcba_phys = pci_read_long(sb, 0xf0) & 0xfffffffe; |
| rcba = map_physical((off_t)rcba_phys, size); |
| |
| //printf("RCBA at 0x%08" PRIx32 "\n", (uint32_t)rcba_phys); |
| fd2 = *(uint32_t *)(rcba + FD2); |
| *(uint32_t *)(rcba + FD2) = fd2 & ~0x2; |
| if (fd2 & 0x2) { |
| printf("MEI was hidden on PCI, now unlocked\n"); |
| } else { |
| printf("MEI not hidden on PCI, checking if visible\n"); |
| } |
| |
| pci_cleanup(pacc); |
| |
| return 0; |
| } |
| |
| static void dump_me_info() { |
| struct pci_dev *dev; |
| uint32_t stat, stat2; |
| char *name; |
| |
| if (pci_platform_scan()) { |
| exit(1); |
| } |
| |
| if (activate_me()) { |
| exit(1); |
| } |
| |
| dev = pci_me_interface_scan(&name); |
| if (!dev) { |
| exit(1); |
| } |
| |
| printf("MEI found: [%x:%x] %s\n\n", dev->vendor_id, dev->device_id, name); |
| stat = pci_read_long(dev, 0x40); |
| printf("ME Status : 0x%x\n", stat); |
| stat2 = pci_read_long(dev, 0x48); |
| printf("ME Status 2 : 0x%x\n\n", stat2); |
| |
| intel_me_status(stat, stat2); |
| printf("\n"); |
| intel_me_extend_valid(dev); |
| printf("\n"); |
| |
| if ((stat & 0xf000) >> 12 != 0) { |
| printf("ME: has a broken implementation on your board with this BIOS\n"); |
| } |
| |
| intel_mei_setup(dev); |
| usleep(ME_COMMAND_DELAY); |
| mei_reset(); |
| usleep(ME_COMMAND_DELAY); |
| mkhi_get_fw_version(); |
| usleep(ME_COMMAND_DELAY); |
| mei_reset(); |
| usleep(ME_COMMAND_DELAY); |
| mkhi_get_fwcaps(); |
| usleep(ME_COMMAND_DELAY); |
| |
| rehide_me(); |
| |
| munmap((void*)rcba, size); |
| } |
| |
| static void print_version(void) |
| { |
| printf("intelmetool v%s -- ", INTELMETOOL_VERSION); |
| printf("Copyright (C) 2015 Damien Zammit\n\n"); |
| printf( |
| "This program is free software: you can redistribute it and/or modify\n" |
| "it under the terms of the GNU General Public License as published by\n" |
| "the Free Software Foundation, version 2 of the License.\n\n" |
| "This program is distributed in the hope that it will be useful,\n" |
| "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" |
| "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" |
| "GNU General Public License for more details.\n\n"); |
| } |
| |
| static void print_usage(const char *name) |
| { |
| printf("usage: %s [-vh?sd]\n", name); |
| printf("\n" |
| " -v | --version: print the version\n" |
| " -h | --help: print this help\n\n" |
| " -s | --show: dump all me information on console\n" |
| " -d | --debug: enable debug output\n" |
| "\n"); |
| exit(1); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int opt, option_index = 0; |
| unsigned cmd_exec = 0; |
| |
| static struct option long_options[] = { |
| {"version", 0, 0, 'v'}, |
| {"help", 0, 0, 'h'}, |
| {"show", 0, 0, 's'}, |
| {"debug", 0, 0, 'd'}, |
| {0, 0, 0, 0} |
| }; |
| |
| while ((opt = getopt_long(argc, argv, "vh?sd", |
| long_options, &option_index)) != EOF) { |
| switch (opt) { |
| case 'v': |
| print_version(); |
| exit(0); |
| break; |
| case 's': |
| cmd_exec = 1; |
| break; |
| case 'd': |
| debug = 1; |
| break; |
| case 'h': |
| case '?': |
| default: |
| print_usage(argv[0]); |
| exit(0); |
| break; |
| } |
| } |
| |
| #if defined(__FreeBSD__) |
| if (open("/dev/io", O_RDWR) < 0) { |
| perror("/dev/io"); |
| #elif defined(__NetBSD__) |
| # ifdef __i386__ |
| if (i386_iopl(3)) { |
| perror("iopl"); |
| # else |
| if (x86_64_iopl(3)) { |
| perror("iopl"); |
| # endif |
| #else |
| if (iopl(3)) { |
| perror("iopl"); |
| #endif |
| printf("You need to be root.\n"); |
| exit(1); |
| } |
| |
| #ifndef __DARWIN__ |
| if ((fd_mem = open("/dev/mem", O_RDWR)) < 0) { |
| perror("Can not open /dev/mem"); |
| exit(1); |
| } |
| #endif |
| |
| switch(cmd_exec) { |
| case 1: |
| dump_me_info(); |
| break; |
| default: |
| print_usage(argv[0]); |
| break; |
| } |
| |
| return 0; |
| } |