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mvebu: fix bootloader kernel commandline mangling

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Currently I'm unable to boot initramfs image with `console=ttyS0,115200`
kernel commandline as the kernel commandline mangling resets kernel
commandline if there is no `root=` option provided, efectively clearing
whatever I pass to the kernel, making the `root=` option mandatory.

So if the kernel commandline mangling is not appropriate just leave the
kernel commandline as it is.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
This commit is contained in:
Petr Štetiar 2020-06-10 16:01:06 +02:00
parent c4037a5b9e
commit 014c101e0b
1 changed files with 34 additions and 27 deletions
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31
target/linux/mvebu/patches-5.4/006-mvebu-Mangle-bootloader-s-kernel-arguments.patch
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@ -21,10 +21,10 @@ was found, resulting in blank cmdline and failure to boot.
Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
---
arch/arm/Kconfig | 11 +++++
arch/arm/boot/compressed/atags_to_fdt.c | 72 ++++++++++++++++++++++++++++++++-
init/main.c | 16 ++++++++
3 files changed, 98 insertions(+), 1 deletion(-)
arch/arm/Kconfig | 11 ++++
arch/arm/boot/compressed/atags_to_fdt.c | 85 ++++++++++++++++++++++++-
init/main.c | 16 +++++
3 files changed, 111 insertions(+), 1 deletion(-)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@ -57,7 +57,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
#else
#define do_extend_cmdline 0
#endif
@@ -67,6 +69,65 @@ static uint32_t get_cell_size(const void
@@ -67,6 +69,72 @@ static uint32_t get_cell_size(const void
return cell_size;
}
@ -78,7 +78,8 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
+ do {
+ ptr++;
+ ptr = strchr(ptr, 'r');
+ if(!ptr) return dest;
+ if (!ptr)
+ goto no_append;
+
+ } while (ptr != str && *(ptr-1) != ' ');
+
@ -97,25 +98,31 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
+
+ /* if append-rootblock property is set use it to append to command line */
+ rootblock = getprop(fdt, "/chosen", "append-rootblock", &l);
+ if(rootblock != NULL) {
+ if (rootblock == NULL)
+ goto no_append;
+
+ if (*dest != ' ') {
+ *dest = ' ';
+ dest++;
+ len++;
+ }
+
+ if (len + l + i <= COMMAND_LINE_SIZE) {
+ memcpy(dest, rootblock, l);
+ dest += l - 1;
+ memcpy(dest, ptr, i);
+ dest += i;
+ }
+ } else {
+
+ return dest;
+
+no_append:
+ len = strlen(str);
+ if (len + 1 < COMMAND_LINE_SIZE) {
+ memcpy(dest, str, len);
+ dest += len;
+ }
+ }
+
+ return dest;
+}
+#endif
@ -123,7 +130,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
{
char cmdline[COMMAND_LINE_SIZE];
@@ -86,12 +147,21 @@ static void merge_fdt_bootargs(void *fdt
@@ -86,12 +154,21 @@ static void merge_fdt_bootargs(void *fdt
/* and append the ATAG_CMDLINE */
if (fdt_cmdline) {
@ -145,7 +152,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
}
*ptr = '\0';
@@ -166,7 +236,9 @@ int atags_to_fdt(void *atag_list, void *
@@ -166,7 +243,9 @@ int atags_to_fdt(void *atag_list, void *
else
setprop_string(fdt, "/chosen", "bootargs",
atag->u.cmdline.cmdline);
@ -156,7 +163,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
if (memcount >= sizeof(mem_reg_property)/4)
continue;
if (!atag->u.mem.size)
@@ -210,6 +282,10 @@ int atags_to_fdt(void *atag_list, void *
@@ -210,6 +289,10 @@ int atags_to_fdt(void *atag_list, void *
setprop(fdt, "/memory", "reg", mem_reg_property,
4 * memcount * memsize);
}