diff options
Diffstat (limited to 'util/ifdtool/ifdtool.c')
| -rw-r--r-- | util/ifdtool/ifdtool.c | 50 |
1 files changed, 47 insertions, 3 deletions
diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c index 43451b165f..7d69bcf9ff 100644 --- a/util/ifdtool/ifdtool.c +++ b/util/ifdtool/ifdtool.c @@ -1497,6 +1497,39 @@ static void unlock_descriptor(const char *filename, char *image, int size) write_image(filename, image, size); } +static void disable_gpr0(const char *filename, char *image, int size) +{ + struct fpsba *fpsba = find_fpsba(image, size); + if (!fpsba) + exit(EXIT_FAILURE); + + /* Offset expressed as number of 32-bit fields from FPSBA */ + uint32_t gpr0_offset; + switch (platform) { + case PLATFORM_CNL: + gpr0_offset = 0x10; + break; + case PLATFORM_JSL: + gpr0_offset = 0x12; + break; + case PLATFORM_TGL: + case PLATFORM_ADL: + gpr0_offset = 0x15; + break; + case PLATFORM_MTL: + gpr0_offset = 0x40; + break; + default: + fprintf(stderr, "Disabling GPR0 not supported on this platform\n"); + exit(EXIT_FAILURE); + } + + /* 0 means GPR0 protection is disabled */ + fpsba->pchstrp[gpr0_offset] = 0; + + write_image(filename, image, size); +} + static void set_pchstrap(struct fpsba *fpsba, const struct fdbar *fdb, const int strap, const unsigned int value) { @@ -1836,6 +1869,7 @@ static void print_usage(const char *name) " -l | --lock Lock firmware descriptor and ME region\n" " -r | --read Enable CPU/BIOS read access for ME region\n" " -u | --unlock Unlock firmware descriptor and ME region\n" + " -g | --gpr0-disable Disable GPR0 (Global Protected Range) register\n" " -M | --altmedisable <0|1> Set the MeDisable and AltMeDisable (or HAP for skylake or newer platform)\n" " bits to disable ME\n" " -p | --platform Add platform-specific quirks\n" @@ -1869,6 +1903,7 @@ int main(int argc, char *argv[]) int mode_em100 = 0, mode_locked = 0, mode_unlocked = 0, mode_validate = 0; int mode_layout = 0, mode_newlayout = 0, mode_density = 0, mode_setstrap = 0; int mode_read = 0, mode_altmedisable = 0, altmedisable = 0, mode_fmap_template = 0; + int mode_gpr0_disable = 0; char *region_type_string = NULL, *region_fname = NULL; const char *layout_fname = NULL; char *new_filename = NULL; @@ -1894,6 +1929,7 @@ int main(int argc, char *argv[]) {"lock", 0, NULL, 'l'}, {"read", 0, NULL, 'r'}, {"unlock", 0, NULL, 'u'}, + {"gpr0-disable", 0, NULL, 'g'}, {"version", 0, NULL, 'v'}, {"help", 0, NULL, 'h'}, {"platform", 0, NULL, 'p'}, @@ -1903,7 +1939,7 @@ int main(int argc, char *argv[]) {0, 0, 0, 0} }; - while ((opt = getopt_long(argc, argv, "S:V:df:F:D:C:M:xi:n:O:s:p:elruvth?", + while ((opt = getopt_long(argc, argv, "S:V:df:F:D:C:M:xi:n:O:s:p:elrugvth?", long_options, &option_index)) != EOF) { switch (opt) { case 'd': @@ -2106,6 +2142,9 @@ int main(int argc, char *argv[]) exit(EXIT_FAILURE); } break; + case 'g': + mode_gpr0_disable = 1; + break; case 'p': if (!strcmp(optarg, "aplk")) { platform = PLATFORM_APL; @@ -2158,7 +2197,8 @@ int main(int argc, char *argv[]) if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject + mode_setstrap + mode_newlayout + (mode_spifreq | mode_em100 | - mode_unlocked | mode_locked) + mode_altmedisable + mode_validate) > 1) { + mode_unlocked | mode_locked) + mode_altmedisable + mode_validate + + mode_gpr0_disable) > 1) { fprintf(stderr, "You may not specify more than one mode.\n\n"); fprintf(stderr, "run '%s -h' for usage\n", argv[0]); exit(EXIT_FAILURE); @@ -2166,7 +2206,8 @@ int main(int argc, char *argv[]) if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject + mode_setstrap + mode_newlayout + mode_spifreq + mode_em100 + - mode_locked + mode_unlocked + mode_density + mode_altmedisable + mode_validate) == 0) { + mode_locked + mode_unlocked + mode_density + mode_altmedisable + + mode_validate + mode_gpr0_disable) == 0) { fprintf(stderr, "You need to specify a mode.\n\n"); fprintf(stderr, "run '%s -h' for usage\n", argv[0]); exit(EXIT_FAILURE); @@ -2263,6 +2304,9 @@ int main(int argc, char *argv[]) if (mode_unlocked) unlock_descriptor(new_filename, image, size); + if (mode_gpr0_disable) + disable_gpr0(new_filename, image, size); + if (mode_setstrap) { struct fpsba *fpsba = find_fpsba(image, size); const struct fdbar *fdb = find_fd(image, size); |