Since linux kernel has dropped support for simple firmware interface
(SFI), the only way of boot newer versions on intel MID platform is
using devicetree
---
kexec/arch/i386/include/arch/options.h | 4 +++-
kexec/arch/i386/kexec-beoboot-x86.c | 2 +-
kexec/arch/i386/kexec-bzImage.c | 21 ++++++++++++++++++++-
kexec/arch/i386/kexec-x86.h | 1 +
kexec/arch/i386/x86-linux-setup.c | 15 +++++++++++++++
kexec/arch/i386/x86-linux-setup.h | 2 ++
kexec/arch/x86_64/kexec-bzImage64.c | 2 +-
7 files changed, 43 insertions(+), 4 deletions(-)
diff --git a/kexec/arch/i386/include/arch/options.h
b/kexec/arch/i386/include/arch/options.h
index 0e57951..89e0a95 100644
--- a/kexec/arch/i386/include/arch/options.h
+++ b/kexec/arch/i386/include/arch/options.h
@@ -33,6 +33,7 @@
#define OPT_PASS_MEMMAP_CMDLINE (OPT_ARCH_MAX+11)
#define OPT_NOEFI (OPT_ARCH_MAX+12)
#define OPT_REUSE_VIDEO_TYPE (OPT_ARCH_MAX+13)
+#define OPT_DTB (OPT_ARCH_MAX+14)
/* Options relevant to the architecture (excluding loader-specific ones): */
#define KEXEC_ARCH_OPTIONS \
@@ -76,7 +77,8 @@
{ "args-none", 0, NULL, OPT_ARGS_NONE }, \
{ "module", 1, 0, OPT_MOD }, \
{ "real-mode", 0, NULL, OPT_REAL_MODE }, \
- { "entry-32bit", 0, NULL, OPT_ENTRY_32BIT },
+ { "entry-32bit", 0, NULL, OPT_ENTRY_32BIT }, \
+ { "dtb", 1, NULL, OPT_DTB },
#define KEXEC_ALL_OPT_STR KEXEC_ARCH_OPT_STR
diff --git a/kexec/arch/i386/kexec-beoboot-x86.c
b/kexec/arch/i386/kexec-beoboot-x86.c
index b121834..d949ab8 100644
--- a/kexec/arch/i386/kexec-beoboot-x86.c
+++ b/kexec/arch/i386/kexec-beoboot-x86.c
@@ -125,7 +125,7 @@ int beoboot_load(int argc, char **argv, const char *buf,
off_t UNUSED(len),
kernel, bb_header.kernel_size,
command_line, bb_header.cmdline_size,
initrd, bb_header.initrd_size,
- real_mode_entry);
+ 0, 0, real_mode_entry);
return result;
}
diff --git a/kexec/arch/i386/kexec-bzImage.c b/kexec/arch/i386/kexec-bzImage.c
index df8985d..1b8f20c 100644
--- a/kexec/arch/i386/kexec-bzImage.c
+++ b/kexec/arch/i386/kexec-bzImage.c
@@ -95,6 +95,7 @@ void bzImage_usage(void)
" --reuse-cmdline Use kernel command line from running
system.\n"
" --initrd=FILE Use FILE as the kernel's initial
ramdisk.\n"
" --ramdisk=FILE Use FILE as the kernel's initial
ramdisk.\n"
+ " --dtb=FILE Use FILE as devicetree.\n"
);
}
@@ -103,6 +104,7 @@ int do_bzImage_load(struct kexec_info *info,
const char *kernel, off_t kernel_len,
const char *command_line, off_t command_line_len,
const char *initrd, off_t initrd_len,
+ const char *dtb, off_t dtb_len,
int real_mode_entry)
{
struct x86_linux_header setup_header;
@@ -373,6 +375,10 @@ int do_bzImage_load(struct kexec_info *info,
setup_linux_system_parameters(info, real_mode);
}
+ if (dtb) {
+ setup_linux_dtb(info, real_mode, dtb, dtb_len);
+ }
+
return 0;
}
@@ -381,13 +387,15 @@ int bzImage_load(int argc, char **argv, const char *buf,
off_t len,
{
char *command_line = NULL;
char *tmp_cmdline = NULL;
- const char *ramdisk, *append = NULL;
+ const char *ramdisk, *append = NULL, *dtb;
char *ramdisk_buf;
off_t ramdisk_length;
int command_line_len;
int real_mode_entry;
int opt;
int result;
+ char *dtb_buf;
+ off_t dtb_length;
/* See options.h -- add any more there, too. */
static const struct option options[] = {
@@ -398,6 +406,7 @@ int bzImage_load(int argc, char **argv, const char *buf,
off_t len,
{ "initrd", 1, 0, OPT_RAMDISK },
{ "ramdisk", 1, 0, OPT_RAMDISK },
{ "real-mode", 0, 0, OPT_REAL_MODE },
+ { "dtb", 1, 0, OPT_DTB },
{ 0, 0, 0, 0 },
};
static const char short_options[] = KEXEC_ARCH_OPT_STR "d";
@@ -405,6 +414,8 @@ int bzImage_load(int argc, char **argv, const char *buf,
off_t len,
real_mode_entry = 0;
ramdisk = 0;
ramdisk_length = 0;
+ dtb = 0;
+ dtb_length = 0;
while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1)
{
switch(opt) {
default:
@@ -424,6 +435,9 @@ int bzImage_load(int argc, char **argv, const char *buf,
off_t len,
case OPT_REAL_MODE:
real_mode_entry = 1;
break;
+ case OPT_DTB:
+ dtb = optarg;
+ break;
}
}
command_line = concat_cmdline(tmp_cmdline, append);
@@ -441,10 +455,15 @@ int bzImage_load(int argc, char **argv, const char *buf,
off_t len,
if (ramdisk) {
ramdisk_buf = slurp_file(ramdisk, &ramdisk_length);
}
+ dtb_buf = 0;
+ if (dtb) {
+ dtb_buf = slurp_file(dtb, &dtb_length);
+ }
result = do_bzImage_load(info,
buf, len,
command_line, command_line_len,
ramdisk_buf, ramdisk_length,
+ dtb_buf, dtb_length,
real_mode_entry);
free(command_line);
diff --git a/kexec/arch/i386/kexec-x86.h b/kexec/arch/i386/kexec-x86.h
index 71e4329..46e2898 100644
--- a/kexec/arch/i386/kexec-x86.h
+++ b/kexec/arch/i386/kexec-x86.h
@@ -79,6 +79,7 @@ int do_bzImage_load(struct kexec_info *info,
const char *kernel, off_t kernel_len,
const char *command_line, off_t command_line_len,
const char *initrd, off_t initrd_len,
+ const char *dtb, off_t dtb_len,
int real_mode_entry);
int beoboot_probe(const char *buf, off_t len);
diff --git a/kexec/arch/i386/x86-linux-setup.c
b/kexec/arch/i386/x86-linux-setup.c
index 14263b0..9a281dc 100644
--- a/kexec/arch/i386/x86-linux-setup.c
+++ b/kexec/arch/i386/x86-linux-setup.c
@@ -954,3 +954,18 @@ void setup_linux_system_parameters(struct kexec_info *info,
/* Always try to fill acpi_rsdp_addr */
real_mode->acpi_rsdp_addr = get_acpi_rsdp();
}
+
+void setup_linux_dtb(struct kexec_info *info, struct x86_linux_param_header
*real_mode,
+ const char *dtb_buf, int dtb_len)
+{
+ struct setup_data *sd;
+
+ sd = xmalloc(sizeof(struct setup_data) + dtb_len);
+ sd->next = 0;
+ sd->len = dtb_len;
+ sd->type = SETUP_DTB;
+ memcpy(sd->data, dtb_buf, dtb_len);
+
+
+ add_setup_data(info, real_mode, sd);
+}
diff --git a/kexec/arch/i386/x86-linux-setup.h
b/kexec/arch/i386/x86-linux-setup.h
index 0c651e5..b5e1ad5 100644
--- a/kexec/arch/i386/x86-linux-setup.h
+++ b/kexec/arch/i386/x86-linux-setup.h
@@ -21,6 +21,8 @@ static inline void setup_linux_bootloader_parameters(
}
void setup_linux_system_parameters(struct kexec_info *info,
struct x86_linux_param_header *real_mode);
+void setup_linux_dtb(struct kexec_info *info, struct x86_linux_param_header
*real_mode,
+ const char *dtb_buf, int dtb_len);
int get_bootparam(void *buf, off_t offset, size_t size);
diff --git a/kexec/arch/x86_64/kexec-bzImage64.c
b/kexec/arch/x86_64/kexec-bzImage64.c
index ba8dc48..aba4e3b 100644
--- a/kexec/arch/x86_64/kexec-bzImage64.c
+++ b/kexec/arch/x86_64/kexec-bzImage64.c
@@ -386,7 +386,7 @@ int bzImage64_load(int argc, char **argv, const char *buf,
off_t len,
if (entry_16bit || entry_32bit)
result = do_bzImage_load(info, buf, len, command_line,
command_line_len, ramdisk_buf,
- ramdisk_length, entry_16bit);
+ ramdisk_length, 0, 0, entry_16bit);
else
result = do_bzImage64_load(info, buf, len, command_line,
command_line_len, ramdisk_buf,
--
2.39.1
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