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Add kexec load legacy kernel patch

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SVN-Revision: 13598
This commit is contained in:
Hamish Guthrie 2008-12-11 15:52:28 +00:00
parent e8859760d6
commit 38b643525c
1 changed files with 187 additions and 0 deletions
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187
package/kexec-tools/patches/0005-ps3-kexec-load-legacy-kernel-hack.patch Normal file
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@ -0,0 +1,187 @@
Hack to load PS3 legacy kernels (2.6.16 and fc7 installer) with the 2.6.23
mainline linux kernel.
---
kexec/arch/ppc64/fs2dt.c | 47 +++++++++++++++++++++++++++++++++++++
kexec/arch/ppc64/kexec-elf-ppc64.c | 44 ++++++++++++++++++++++++++++++++++
kexec/arch/ppc64/kexec-ppc64.c | 5 +++
kexec/arch/ppc64/kexec-ppc64.h | 2 +
4 files changed, 98 insertions(+)
--- a/kexec/arch/ppc64/fs2dt.c
+++ b/kexec/arch/ppc64/fs2dt.c
@@ -262,6 +262,33 @@ static void putprops(char *fn, struct di
die("unrecoverable error: could not read \"%s\": %s\n",
pathname, strerror(errno));
+ /* ps3 legacy - Add 'PS3PF' to compatible */
+
+ if (ps3_legacy && !strcmp(dp->d_name, "compatible")) {
+ static const char s[] = "PS3PF";
+ char *const tmp = (char *)dt + len;
+
+ memcpy(tmp, s, sizeof(s));
+ len += sizeof(s);
+ *dt_len = len;
+
+ fprintf(stdout, "ps3 legacy: Changed dt entry "
+ "/compatible: <%s> -> <%s %s>\n",
+ (char *)dt, (char *)dt, tmp);
+ }
+
+ /* ps3 legacy - force memory.reg to 224 MiB */
+
+ if (ps3_legacy && !strcmp(dp->d_name, "reg") && len == 16) {
+ uint64_t tmp = *((uint64_t *)dt + 1);
+
+ *((uint64_t *)dt + 1) = 0xe000000ULL;
+ fprintf(stdout, "ps3 legacy: Changed dt entry "
+ "/memory/reg: <%llx> -> <%llx>\n",
+ (unsigned long long)tmp,
+ *((unsigned long long *)dt + 1));
+ }
+
checkprop(fn, dt, len);
dt += (len + 3)/4;
@@ -360,6 +387,26 @@ static void putnode(void)
reserve(initrd_base, initrd_size);
}
+ /* ps3 legacy - add entry linux,platform <801> */
+
+ if (ps3_legacy && !strcmp(basename,"/chosen/")) {
+ int len = 4;
+ static const uint32_t data = 0x801UL;
+
+ *dt++ = 3;
+ *dt++ = len;
+ *dt++ = propnum("linux,platform");
+
+ if ((len >= 8) && ((unsigned long)dt & 0x4))
+ dt++;
+
+ memcpy(dt,&data,len);
+ dt += (len + 3)/4;
+
+ fprintf(stdout, "ps3 legacy: Added dt entry "
+ "/chosen/linux,platform = <801>\n");
+ }
+
/* Add cmdline to the second kernel. Check to see if the new
* cmdline has a root=. If not, use the old root= cmdline. */
if (!strcmp(basename,"/chosen/")) {
--- a/kexec/arch/ppc64/kexec-elf-ppc64.c
+++ b/kexec/arch/ppc64/kexec-elf-ppc64.c
@@ -45,6 +45,7 @@
uint64_t initrd_base, initrd_size;
unsigned char reuse_initrd = 0;
const char *ramdisk;
+int ps3_legacy = -1; /* default to probe */
int create_flatten_tree(struct kexec_info *, unsigned char **, unsigned long *,
char *);
@@ -76,6 +77,33 @@ void arch_reuse_initrd(void)
reuse_initrd = 1;
}
+/**
+ * ps3_legacy_probe - Probe kernel version.
+ */
+
+static int ps3_legacy_probe(const char *p, off_t len)
+{
+ static const char d1[] = "linux,platform"; /* legacy 2.6.16 */
+ static const char d2[] = "2.6.21-1.3194.fc7"; /* fedora 7 installer */
+ const char *const end = p + len - sizeof(d2);
+
+ while(p < end) {
+ if (p[0] == d1[0] && !memcmp(p, d1, sizeof(d1) - 1)) {
+ fprintf(stdout, "ps3 legacy: Legacy kernel found: "
+ "'%s'\n", d1);
+ break;
+ }
+ if (p[0] == d2[0] && !memcmp(p, d2, sizeof(d2) - 1)) {
+ fprintf(stdout, "ps3 legacy: Legacy kernel found: "
+ "'%s'\n", d2);
+ break;
+ }
+ p++;
+ }
+
+ return (p != end);
+}
+
int elf_ppc64_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info)
{
@@ -102,6 +130,8 @@ int elf_ppc64_load(int argc, char **argv
#define OPT_RAMDISK (OPT_ARCH_MAX+1)
#define OPT_DEVICETREEBLOB (OPT_ARCH_MAX+2)
#define OPT_ARGS_IGNORE (OPT_ARCH_MAX+3)
+#define OPT_PS3_LEGACY (OPT_ARCH_MAX+4)
+#define OPT_PS3_LEGACY_NO (OPT_ARCH_MAX+5)
static const struct option options[] = {
KEXEC_ARCH_OPTIONS
@@ -111,6 +141,8 @@ int elf_ppc64_load(int argc, char **argv
{ "initrd", 1, NULL, OPT_RAMDISK },
{ "devicetreeblob", 1, NULL, OPT_DEVICETREEBLOB },
{ "args-linux", 0, NULL, OPT_ARGS_IGNORE },
+ { "ps3-legacy", 0, NULL, OPT_PS3_LEGACY },
+ { "ps3-no-legacy", 0, NULL, OPT_PS3_LEGACY_NO },
{ 0, 0, NULL, 0 },
};
@@ -146,9 +178,18 @@ int elf_ppc64_load(int argc, char **argv
break;
case OPT_ARGS_IGNORE:
break;
+ case OPT_PS3_LEGACY:
+ ps3_legacy = 1;
+ break;
+ case OPT_PS3_LEGACY_NO:
+ ps3_legacy = 0;
+ break;
}
}
+ if (ps3_legacy == -1)
+ ps3_legacy = ps3_legacy_probe(buf, len);
+
cmdline_len = 0;
if (cmdline)
cmdline_len = strlen(cmdline) + 1;
@@ -158,6 +199,9 @@ int elf_ppc64_load(int argc, char **argv
if (ramdisk && reuse_initrd)
die("Can't specify --ramdisk or --initrd with --reuseinitrd\n");
+ if (ps3_legacy && devicetreeblob)
+ die("Can't specify --devicetreeblob with --ps3-legacy\n");
+
setup_memory_ranges(info->kexec_flags);
/* Need to append some command line parameters internally in case of
--- a/kexec/arch/ppc64/kexec-ppc64.c
+++ b/kexec/arch/ppc64/kexec-ppc64.c
@@ -650,6 +650,11 @@ void arch_usage(void)
fprintf(stderr, " --initrd=<filename> same as --ramdisk.\n");
fprintf(stderr, " --devicetreeblob=<filename> Specify device tree blob file.\n");
fprintf(stderr, " --elf64-core-headers Prepare core headers in ELF64 format\n");
+ fprintf(stderr, " --ps3-legacy Make fixups needed to boot PS3 legacy kernels.\n");
+ fprintf(stderr, " The default is to probe the kernel type.\n");
+ fprintf(stderr, " --ps3-no-legacy Do not make fixups needed to boot PS3 legacy\n");
+ fprintf(stderr, " kernels. The default is to probe the kernel\n");
+ fprintf(stderr, " type.\n");
}
struct arch_options_t arch_options = {
--- a/kexec/arch/ppc64/kexec-ppc64.h
+++ b/kexec/arch/ppc64/kexec-ppc64.h
@@ -41,4 +41,6 @@ typedef struct mem_rgns {
extern mem_rgns_t usablemem_rgns;
+extern int ps3_legacy;
+
#endif /* KEXEC_PPC64_H */