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