Change in flashrom[stable]: cli_classic: Add option (-N, --noverify-all)

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/21792

Change subject: cli_classic: Add option (-N, --noverify-all)
......................................................................

cli_classic: Add option (-N, --noverify-all)

This option specifies to verify included regions only after a write.
It also reduces the data read before the write.

v2: o Changed short option name to `-N`.
    o Added section in the manual page.

Original-Change-Id: I40b5983f56d62821d17b827b88b73d1d41a30bd7
Original-Reviewed-on: https://review.coreboot.org/17950
Original-Tested-by: build bot (Jenkins) 
Original-Reviewed-by: Stefan Reinauer

Change-Id: I0244b114920c215f1e6b1573fcefaa23c9be241b
Signed-off-by: Nico Huber 
---
M cli_classic.c
M flashrom.8.tmpl
2 files changed, 26 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/92/21792/1

diff --git a/cli_classic.c b/cli_classic.c
index 1845dbd..30ff140 100644
--- a/cli_classic.c
+++ b/cli_classic.c
@@ -42,7 +42,7 @@
           "-z|"
 #endif
           "-p <programmername>[:<parameters>] [-c <chipname>]\n"
-	       "[-E|(-r|-w|-v) <file>] [-l <layoutfile> [-i <imagename>]...] [-n] [-f]]\n"
+	       "[-E|(-r|-w|-v) <file>] [-l <layoutfile> [-i <imagename>]...] [-n] [-N] [-f]]\n"
           "[-V[V[V]]] [-o <logfile>]\n\n", name);

printf(" -h | --help                        print this help text\n"
@@ -55,6 +55,7 @@
           " -c | --chip <chipname>             probe only for specified flash chip\n"
           " -f | --force                       force specific operations (see man page)\n"
           " -n | --noverify                    don't auto-verify\n"
+	       " -N | --noverify-all                verify included regions only (cf. -i)\n"
           " -l | --layout <layoutfile>         read ROM layout from <layoutfile>\n"
           " -i | --image <name>                only flash image <name> from flash layout\n"
           " -o | --output <logfile>            log output to <logfile>\n"
@@ -103,17 +104,18 @@
    int list_supported_wiki = 0;
 #endif
    int read_it = 0, write_it = 0, erase_it = 0, verify_it = 0;
-	int dont_verify_it = 0, list_supported = 0, operation_specified = 0;
+	int dont_verify_it = 0, dont_verify_all = 0, list_supported = 0, operation_specified = 0;
    enum programmer prog = PROGRAMMER_INVALID;
    int ret = 0;

-	static const char optstring[] = "r:Rw:v:nVEfc:l:i:p:Lzho:";
+	static const char optstring[] = "r:Rw:v:nNVEfc:l:i:p:Lzho:";
    static const struct option long_options[] = {
    	{"read",		1, NULL, 'r'},
    	{"write",		1, NULL, 'w'},
    	{"erase",		0, NULL, 'E'},
    	{"verify",		1, NULL, 'v'},
    	{"noverify",		0, NULL, 'n'},
+		{"noverify-all",	0, NULL, 'N'},
    	{"chip",		1, NULL, 'c'},
    	{"verbose",		0, NULL, 'V'},
    	{"force",		0, NULL, 'f'},
@@ -189,6 +191,9 @@
    			cli_classic_abort_usage();
    		}
    		dont_verify_it = 1;
+			break;
+		case 'N':
+			dont_verify_all = 1;
    		break;
    	case 'c':
    		chip_to_probe = strdup(optarg);
@@ -538,7 +543,7 @@
    flashrom_flag_set(fill_flash, FLASHROM_FLAG_FORCE_BOARDMISMATCH, !!force_boardmismatch);
 #endif
    flashrom_flag_set(fill_flash, FLASHROM_FLAG_VERIFY_AFTER_WRITE, !dont_verify_it);
-	flashrom_flag_set(fill_flash, FLASHROM_FLAG_VERIFY_WHOLE_CHIP, true);
+	flashrom_flag_set(fill_flash, FLASHROM_FLAG_VERIFY_WHOLE_CHIP, !dont_verify_all);

/* FIXME: We should issue an unconditional chip reset here. This can be
     * done once we have a .reset function in struct flashchip.
diff --git a/flashrom.8.tmpl b/flashrom.8.tmpl
index 34e1fe7..34e7f02 100644
--- a/flashrom.8.tmpl
+++ b/flashrom.8.tmpl
@@ -48,7 +48,8 @@
 \fB-p\fR <programmername>[:<parameters>]
                [\fB-E\fR|\fB-r\fR <file>|\fB-w\fR <file>|\fB-v\fR <file>] \
 [\fB-c\fR <chipname>]
-               [\fB-l\fR <file> [\fB-i\fR <image>]] [\fB-n\fR] [\fB-f\fR]]
+               [\fB-l\fR <file> [\fB-i\fR <image>]] [\fB-n\fR] [\fB-N\fR] \
+[\fB-f\fR]]
          [\fB-V\fR[\fBV\fR[\fBV\fR]]] [\fB-o\fR <logfile>]
 .SH DESCRIPTION
 .B flashrom
@@ -112,6 +113,21 @@
 This option is only useful in combination with
 .BR --write .
 .TP
+.B "-N, --noverify-all"
+Skip not included regions during automatic verification after writing (cf.
+.BR "-l " "and " "-i" ).
+You should only use this option if you are sure that communication with
+the flash chip is reliable (e.g. when using the
+.BR internal
+programmer). Even if flashrom is instructed not to touch parts of the
+flash chip, their contents could be damaged (e.g. due to misunderstood
+erase commands).
+.sp
+This option is required to flash an Intel system with locked ME flash
+region using the
+.BR internal
+programmer. It may be enabled by default in this case in the future.
+.TP
 .B "-v, --verify <file>"
 Verify the flash ROM contents against the given
 .BR <file> .