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lbmk/resources/coreboot/default/patches/0016-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch
T
Leah Rowe a5aa5bca77 ICH9M: default to 256MB VRAM, not 352MB 
352MB VRAM causes stability issues, according to some reports

users can still set it to the higher level when building, if
they wish to
2023-03-04 23:58:17 +00:00

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From 32a961895ed41cd2bb1f9ae00ab0200c4bfb0bf3 Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Sun, 19 Feb 2023 18:21:43 +0000
Subject: [PATCH 16/18] 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.
---
util/ifdtool/ifdtool.c | 117 ++++++++++++++++++++++++++++++-----------
1 file changed, 85 insertions(+), 32 deletions(-)
diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c
index 98afa4bbcf..5509721018 100644
--- a/util/ifdtool/ifdtool.c
+++ b/util/ifdtool/ifdtool.c
@@ -1771,6 +1771,7 @@ static void print_usage(const char *name)
" wbg - Wellsburg\n"
" -S | --setpchstrap Write a PCH strap\n"
" -V | --newvalue The new value to write into PCH strap specified by -S\n"
+ " -N | --nuke <region> Overwrite the specified region with 0xFF (all ones)\n"
" -v | --version: print the version\n"
" -h | --help: print this help\n\n"
"<region> is one of Descriptor, BIOS, ME, GbE, Platform Data, Secondary BIOS, "
@@ -1778,13 +1779,70 @@ static void print_usage(const char *name)
"\n");
}
+static int
+get_region_type_string(const char *region_type_string)
+{
+ if (region_type_string == NULL)
+ return -1;
+ else 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;
+ else
+ return -1;
+}
+
+static void
+nuke(const char *filename, char *image, int size, int region_type)
+{
+ int i;
+ region_t region;
+ const frba_t *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;
int mode_dump = 0, mode_extract = 0, mode_inject = 0, mode_spifreq = 0;
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;
+ int mode_read = 0, mode_altmedisable = 0, altmedisable = 0, mode_nuke = 0;
char *region_type_string = NULL, *region_fname = NULL;
const char *layout_fname = NULL;
char *new_filename = NULL;
@@ -1815,6 +1873,7 @@ int main(int argc, char *argv[])
{"validate", 0, NULL, 't'},
{"setpchstrap", 1, NULL, 'S'},
{"newvalue", 1, NULL, 'V'},
+ {"nuke", 1, NULL, 'N'},
{0, 0, 0, 0}
};
@@ -1855,35 +1914,8 @@ 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);
print_usage(argv[0]);
@@ -2050,6 +2082,22 @@ int main(int argc, char *argv[])
case 't':
mode_validate = 1;
break;
+ 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);
@@ -2065,7 +2113,7 @@ int main(int argc, char *argv[])
if ((mode_dump + mode_layout + mode_extract + mode_inject + mode_setstrap +
mode_newlayout + (mode_spifreq | mode_em100 | mode_unlocked |
- mode_locked) + mode_altmedisable + mode_validate) > 1) {
+ mode_locked) + mode_altmedisable + mode_validate + mode_nuke) > 1) {
fprintf(stderr, "You may not specify more than one mode.\n\n");
print_usage(argv[0]);
exit(EXIT_FAILURE);
@@ -2073,7 +2121,8 @@ int main(int argc, char *argv[])
if ((mode_dump + mode_layout + mode_extract + mode_inject + mode_setstrap +
mode_newlayout + mode_spifreq + mode_em100 + mode_locked +
- mode_unlocked + mode_density + mode_altmedisable + mode_validate) == 0) {
+ mode_unlocked + mode_density + mode_altmedisable + mode_validate +
+ mode_nuke) == 0) {
fprintf(stderr, "You need to specify a mode.\n\n");
print_usage(argv[0]);
exit(EXIT_FAILURE);
@@ -2171,6 +2220,10 @@ 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) {
fpsba_t *fpsba = find_fpsba(image, size);
fmsba_t *fmsba = find_fmsba(image, size);
--
2.39.2
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