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lbmk/config/coreboot/default/patches/0005-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch
T
Leah Rowe 2edd583aee Add ThinkPad X270 coreboot port from Kat Inskip 
Courtesy of Kat Inskip who ported this board.

Headphone output doesn't work at the moment, due to incorrect verb.
Intel VBT is also wrong. Both are taken from another board.

This will be amended later with the correct verb and VBT.

Signed-off-by: Leah Rowe <leah@libreboot.org>
2026-02-21 08:26:44 +00:00

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From 434136e0aca4839e449e3841a5e993688b4586f0 Mon Sep 17 00:00:00 2001
From: Leah Rowe <info@minifree.org>
Date: Sun, 19 Feb 2023 18:21:43 +0000
Subject: [PATCH 05/48] util/ifdtool: add --nuke flag (all 0xFF on region)
When this option is used, the region's contents are overwritten
with all ones (0xFF).
Example:
./ifdtool --nuke gbe coreboot.rom
./ifdtool --nuke bios coreboot.com
./ifdtool --nuke me coreboot.com
Rebased since the last revision update in lbmk.
Signed-off-by: Leah Rowe <leah@libreboot.org>
---
util/ifdtool/ifdtool.c | 116 +++++++++++++++++++++++++++++------------
1 file changed, 84 insertions(+), 32 deletions(-)
diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c
index 0592785bf6..cab934c3a5 100644
--- a/util/ifdtool/ifdtool.c
+++ b/util/ifdtool/ifdtool.c
@@ -2240,6 +2240,7 @@ static void print_usage(const char *name)
" tgl - Tiger Lake\n"
" wbg - Wellsburg\n"
" -S | --setpchstrap Write a PCH strap\n"
+ " -N | --nuke <region> Overwrite the specified region with 0xFF (all ones)\n"
" -V | --newvalue The new value to write into PCH strap specified by -S\n"
" -T | --topswapsize Set the Top Swap Block Size PCH strap value\n"
" Possible values: 0x10000, 0x20000, 0x40000, 0x80000,\n"
@@ -2251,6 +2252,60 @@ static void print_usage(const char *name)
"\n");
}
+static int
+get_region_type_string(const char *region_type_string)
+{
+ if (!strcasecmp("Descriptor", region_type_string))
+ return 0;
+ else if (!strcasecmp("BIOS", region_type_string))
+ return 1;
+ else if (!strcasecmp("ME", region_type_string))
+ return 2;
+ else if (!strcasecmp("GbE", region_type_string))
+ return 3;
+ else if (!strcasecmp("Platform Data", region_type_string))
+ return 4;
+ else if (!strcasecmp("Device Exp1", region_type_string))
+ return 5;
+ else if (!strcasecmp("Secondary BIOS", region_type_string))
+ return 6;
+ else if (!strcasecmp("Reserved", region_type_string))
+ return 7;
+ else if (!strcasecmp("EC", region_type_string))
+ return 8;
+ else if (!strcasecmp("Device Exp2", region_type_string))
+ return 9;
+ else if (!strcasecmp("IE", region_type_string))
+ return 10;
+ else if (!strcasecmp("10GbE_0", region_type_string))
+ return 11;
+ else if (!strcasecmp("10GbE_1", region_type_string))
+ return 12;
+ else if (!strcasecmp("PTT", region_type_string))
+ return 15;
+ return -1;
+}
+
+static void
+nuke(const char *filename, char *image, int size, int region_type)
+{
+ int i;
+ struct region region;
+ const struct frba *frba = find_frba(image, size);
+ if (!frba)
+ exit(EXIT_FAILURE);
+
+ region = get_region(frba, region_type);
+ if (region.size > 0) {
+ for (i = region.base; i <= region.limit; i++) {
+ if ((i + 1) > (size))
+ break;
+ image[i] = 0xFF;
+ }
+ write_image(filename, image, size);
+ }
+}
+
int main(int argc, char *argv[])
{
int opt, option_index = 0;
@@ -2258,6 +2313,7 @@ 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_nuke = 0;
int mode_gpr0_disable = 0, mode_gpr0_enable = 0, mode_gpr0_status = 0;
int mode_settopswapsize = 0;
char *region_type_string = NULL, *region_fname = NULL, *layout_fname = NULL;
@@ -2294,6 +2350,7 @@ int main(int argc, char *argv[])
{"setpchstrap", 1, NULL, 'S'},
{"newvalue", 1, NULL, 'V'},
{"topswapsize", 1, NULL, 'T'},
+ {"nuke", 1, NULL, 'N'},
{0, 0, 0, 0}
};
@@ -2343,35 +2400,8 @@ int main(int argc, char *argv[])
region_fname++;
// Descriptor, BIOS, ME, GbE, Platform
// valid type?
- if (!strcasecmp("Descriptor", region_type_string))
- region_type = 0;
- else if (!strcasecmp("BIOS", region_type_string))
- region_type = 1;
- else if (!strcasecmp("ME", region_type_string))
- region_type = 2;
- else if (!strcasecmp("GbE", region_type_string))
- region_type = 3;
- else if (!strcasecmp("Platform Data", region_type_string))
- region_type = 4;
- else if (!strcasecmp("Device Exp1", region_type_string))
- region_type = 5;
- else if (!strcasecmp("Secondary BIOS", region_type_string))
- region_type = 6;
- else if (!strcasecmp("Reserved", region_type_string))
- region_type = 7;
- else if (!strcasecmp("EC", region_type_string))
- region_type = 8;
- else if (!strcasecmp("Device Exp2", region_type_string))
- region_type = 9;
- else if (!strcasecmp("IE", region_type_string))
- region_type = 10;
- else if (!strcasecmp("10GbE_0", region_type_string))
- region_type = 11;
- else if (!strcasecmp("10GbE_1", region_type_string))
- region_type = 12;
- else if (!strcasecmp("PTT", region_type_string))
- region_type = 15;
- if (region_type == -1) {
+ if ((region_type =
+ get_region_type_string(region_type_string)) == -1) {
fprintf(stderr, "No such region type: '%s'\n\n",
region_type_string);
fprintf(stderr, "run '%s -h' for usage\n", argv[0]);
@@ -2552,7 +2582,23 @@ int main(int argc, char *argv[])
mode_settopswapsize = 1;
top_swap_size_arg = optarg;
break;
- case 'v':
+ case 'N':
+ region_type_string = strdup(optarg);
+ if (!region_type_string) {
+ fprintf(stderr, "No region specified\n");
+ print_usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+ if ((region_type =
+ get_region_type_string(region_type_string)) == -1) {
+ fprintf(stderr, "No such region type: '%s'\n\n",
+ region_type_string);
+ print_usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+ mode_nuke = 1;
+ break;
+ Case 'v':
print_version();
exit(EXIT_SUCCESS);
break;
@@ -2571,7 +2617,8 @@ int main(int argc, char *argv[])
if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject +
mode_setstrap + mode_settopswapsize + mode_newlayout + (mode_spifreq | mode_em100 |
mode_unlocked | mode_locked) + mode_altmedisable + mode_validate +
- (mode_gpr0_disable | mode_gpr0_enable) + mode_gpr0_status) > 1) {
+ (mode_gpr0_disable | mode_gpr0_enable) + mode_gpr0_status +
+ mode_nuke) > 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);
@@ -2580,7 +2627,8 @@ int main(int argc, char *argv[])
if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject +
mode_setstrap + mode_settopswapsize + mode_newlayout + mode_spifreq + mode_em100 +
mode_locked + mode_unlocked + mode_density + mode_altmedisable +
- mode_validate + (mode_gpr0_disable | mode_gpr0_enable) + mode_gpr0_status) == 0) {
+ mode_validate + (mode_gpr0_disable | mode_gpr0_enable) + mode_gpr0_status +
+ mode_nuke) == 0) {
fprintf(stderr, "You need to specify a mode.\n\n");
fprintf(stderr, "run '%s -h' for usage\n", argv[0]);
exit(EXIT_FAILURE);
@@ -2746,6 +2794,10 @@ int main(int argc, char *argv[])
write_image(new_filename, image, size);
}
+ if (mode_nuke) {
+ nuke(new_filename, image, size, region_type);
+ }
+
if (mode_altmedisable) {
struct fpsba *fpsba = find_fpsba(image, size);
struct fmsba *fmsba = find_fmsba(image, size);
--
2.47.3
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