Revert "powerpc: Sync RPA note in zImage with kernel's RPA note"
This reverts commit 91a00302959545a9ae423e99732b1e46eb19e877, plus
commit 0dcd440120ef12879ff34fc78d7e4abf171c79e4 ("powerpc: Revert CHRP
boot wrapper to real-base = 12MB on 32-bit") which depended on it.
Commit 91a00302 was causing NVRAM corruption on some pSeries machines,
for as-yet unknown reasons, so this reverts it until the cause is
identified.
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/addnote.c b/arch/powerpc/boot/addnote.c
index 3091d1d..b1e5611 100644
--- a/arch/powerpc/boot/addnote.c
+++ b/arch/powerpc/boot/addnote.c
@@ -11,12 +11,7 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
- * Usage: addnote [-r realbase] zImage [note.elf]
- *
- * If note.elf is supplied, it is the name of an ELF file that contains
- * an RPA note to use instead of the built-in one. Alternatively, the
- * note.elf file may be empty, in which case the built-in RPA note is
- * used (this is to simplify how this is invoked from the wrapper script).
+ * Usage: addnote zImage
*/
#include <stdio.h>
#include <stdlib.h>
@@ -48,29 +43,27 @@
*/
#define N_RPA_DESCR 8
unsigned int rpanote[N_RPA_DESCR] = {
- 1, /* lparaffinity */
- 128, /* min_rmo_size */
+ 0, /* lparaffinity */
+ 64, /* min_rmo_size */
0, /* min_rmo_percent */
- 46, /* max_pft_size */
+ 40, /* max_pft_size */
1, /* splpar */
-1, /* min_load */
- 1, /* new_mem_def */
- 0, /* ignore_my_client_config */
+ 0, /* new_mem_def */
+ 1, /* ignore_my_client_config */
};
#define ROUNDUP(len) (((len) + 3) & ~3)
unsigned char buf[512];
-unsigned char notebuf[512];
-#define GET_16BE(b, off) (((b)[off] << 8) + ((b)[(off)+1]))
-#define GET_32BE(b, off) ((GET_16BE((b), (off)) << 16) + \
- GET_16BE((b), (off)+2))
+#define GET_16BE(off) ((buf[off] << 8) + (buf[(off)+1]))
+#define GET_32BE(off) ((GET_16BE(off) << 16) + GET_16BE((off)+2))
-#define PUT_16BE(b, off, v) ((b)[off] = ((v) >> 8) & 0xff, \
- (b)[(off) + 1] = (v) & 0xff)
-#define PUT_32BE(b, off, v) (PUT_16BE((b), (off), (v) >> 16), \
- PUT_16BE((b), (off) + 2, (v)))
+#define PUT_16BE(off, v) (buf[off] = ((v) >> 8) & 0xff, \
+ buf[(off) + 1] = (v) & 0xff)
+#define PUT_32BE(off, v) (PUT_16BE((off), (v) >> 16), \
+ PUT_16BE((off) + 2, (v)))
/* Structure of an ELF file */
#define E_IDENT 0 /* ELF header */
@@ -95,95 +88,25 @@
unsigned char elf_magic[4] = { 0x7f, 'E', 'L', 'F' };
-unsigned char *read_rpanote(const char *fname, int *nnp)
-{
- int notefd, nr, i;
- int ph, ps, np;
- int note, notesize;
-
- notefd = open(fname, O_RDONLY);
- if (notefd < 0) {
- perror(fname);
- exit(1);
- }
- nr = read(notefd, notebuf, sizeof(notebuf));
- if (nr < 0) {
- perror("read note");
- exit(1);
- }
- if (nr == 0) /* empty file */
- return NULL;
- if (nr < E_HSIZE ||
- memcmp(¬ebuf[E_IDENT+EI_MAGIC], elf_magic, 4) != 0 ||
- notebuf[E_IDENT+EI_CLASS] != ELFCLASS32 ||
- notebuf[E_IDENT+EI_DATA] != ELFDATA2MSB)
- goto notelf;
- close(notefd);
-
- /* now look for the RPA-note */
- ph = GET_32BE(notebuf, E_PHOFF);
- ps = GET_16BE(notebuf, E_PHENTSIZE);
- np = GET_16BE(notebuf, E_PHNUM);
- if (ph < E_HSIZE || ps < PH_HSIZE || np < 1)
- goto notelf;
-
- for (i = 0; i < np; ++i, ph += ps) {
- if (GET_32BE(notebuf, ph + PH_TYPE) != PT_NOTE)
- continue;
- note = GET_32BE(notebuf, ph + PH_OFFSET);
- notesize = GET_32BE(notebuf, ph + PH_FILESZ);
- if (notesize < 34 || note + notesize > nr)
- continue;
- if (GET_32BE(notebuf, note) != strlen(rpaname) + 1 ||
- GET_32BE(notebuf, note + 8) != 0x12759999 ||
- strcmp((char *)¬ebuf[note + 12], rpaname) != 0)
- continue;
- /* looks like an RPA note, return it */
- *nnp = notesize;
- return ¬ebuf[note];
- }
- /* no RPA note found */
- return NULL;
-
- notelf:
- fprintf(stderr, "%s is not a big-endian 32-bit ELF image\n", fname);
- exit(1);
-}
-
int
main(int ac, char **av)
{
- int fd, n, i, ai;
+ int fd, n, i;
int ph, ps, np;
int nnote, nnote2, ns;
- unsigned char *rpap;
- char *p, *endp;
- ai = 1;
- if (ac >= ai + 2 && strcmp(av[ai], "-r") == 0) {
- /* process -r realbase */
- p = av[ai + 1];
- descr[1] = strtol(p, &endp, 16);
- if (endp == p || *endp != 0) {
- fprintf(stderr, "Can't parse -r argument '%s' as hex\n",
- p);
- exit(1);
- }
- ai += 2;
- }
- if (ac != ai + 1 && ac != ai + 2) {
- fprintf(stderr, "Usage: %s [-r realbase] elf-file [rpanote.elf]\n", av[0]);
+ if (ac != 2) {
+ fprintf(stderr, "Usage: %s elf-file\n", av[0]);
exit(1);
}
- fd = open(av[ai], O_RDWR);
+ fd = open(av[1], O_RDWR);
if (fd < 0) {
- perror(av[ai]);
+ perror(av[1]);
exit(1);
}
nnote = 12 + ROUNDUP(strlen(arch) + 1) + sizeof(descr);
nnote2 = 12 + ROUNDUP(strlen(rpaname) + 1) + sizeof(rpanote);
- rpap = NULL;
n = read(fd, buf, sizeof(buf));
if (n < 0) {
@@ -197,25 +120,22 @@
if (buf[E_IDENT+EI_CLASS] != ELFCLASS32
|| buf[E_IDENT+EI_DATA] != ELFDATA2MSB) {
fprintf(stderr, "%s is not a big-endian 32-bit ELF image\n",
- av[ai]);
+ av[1]);
exit(1);
}
- if (ac == ai + 2)
- rpap = read_rpanote(av[ai + 1], &nnote2);
-
- ph = GET_32BE(buf, E_PHOFF);
- ps = GET_16BE(buf, E_PHENTSIZE);
- np = GET_16BE(buf, E_PHNUM);
+ ph = GET_32BE(E_PHOFF);
+ ps = GET_16BE(E_PHENTSIZE);
+ np = GET_16BE(E_PHNUM);
if (ph < E_HSIZE || ps < PH_HSIZE || np < 1)
goto notelf;
if (ph + (np + 2) * ps + nnote + nnote2 > n)
goto nospace;
for (i = 0; i < np; ++i) {
- if (GET_32BE(buf, ph + PH_TYPE) == PT_NOTE) {
+ if (GET_32BE(ph + PH_TYPE) == PT_NOTE) {
fprintf(stderr, "%s already has a note entry\n",
- av[ai]);
+ av[1]);
exit(0);
}
ph += ps;
@@ -228,42 +148,37 @@
/* fill in the program header entry */
ns = ph + 2 * ps;
- PUT_32BE(buf, ph + PH_TYPE, PT_NOTE);
- PUT_32BE(buf, ph + PH_OFFSET, ns);
- PUT_32BE(buf, ph + PH_FILESZ, nnote);
+ PUT_32BE(ph + PH_TYPE, PT_NOTE);
+ PUT_32BE(ph + PH_OFFSET, ns);
+ PUT_32BE(ph + PH_FILESZ, nnote);
/* fill in the note area we point to */
/* XXX we should probably make this a proper section */
- PUT_32BE(buf, ns, strlen(arch) + 1);
- PUT_32BE(buf, ns + 4, N_DESCR * 4);
- PUT_32BE(buf, ns + 8, 0x1275);
+ PUT_32BE(ns, strlen(arch) + 1);
+ PUT_32BE(ns + 4, N_DESCR * 4);
+ PUT_32BE(ns + 8, 0x1275);
strcpy((char *) &buf[ns + 12], arch);
ns += 12 + strlen(arch) + 1;
for (i = 0; i < N_DESCR; ++i, ns += 4)
- PUT_32BE(buf, ns, descr[i]);
+ PUT_32BE(ns, descr[i]);
/* fill in the second program header entry and the RPA note area */
ph += ps;
- PUT_32BE(buf, ph + PH_TYPE, PT_NOTE);
- PUT_32BE(buf, ph + PH_OFFSET, ns);
- PUT_32BE(buf, ph + PH_FILESZ, nnote2);
+ PUT_32BE(ph + PH_TYPE, PT_NOTE);
+ PUT_32BE(ph + PH_OFFSET, ns);
+ PUT_32BE(ph + PH_FILESZ, nnote2);
/* fill in the note area we point to */
- if (rpap) {
- /* RPA note supplied in file, just copy the whole thing over */
- memcpy(buf + ns, rpap, nnote2);
- } else {
- PUT_32BE(buf, ns, strlen(rpaname) + 1);
- PUT_32BE(buf, ns + 4, sizeof(rpanote));
- PUT_32BE(buf, ns + 8, 0x12759999);
- strcpy((char *) &buf[ns + 12], rpaname);
- ns += 12 + ROUNDUP(strlen(rpaname) + 1);
- for (i = 0; i < N_RPA_DESCR; ++i, ns += 4)
- PUT_32BE(buf, ns, rpanote[i]);
- }
+ PUT_32BE(ns, strlen(rpaname) + 1);
+ PUT_32BE(ns + 4, sizeof(rpanote));
+ PUT_32BE(ns + 8, 0x12759999);
+ strcpy((char *) &buf[ns + 12], rpaname);
+ ns += 12 + ROUNDUP(strlen(rpaname) + 1);
+ for (i = 0; i < N_RPA_DESCR; ++i, ns += 4)
+ PUT_32BE(ns, rpanote[i]);
/* Update the number of program headers */
- PUT_16BE(buf, E_PHNUM, np + 2);
+ PUT_16BE(E_PHNUM, np + 2);
/* write back */
lseek(fd, (long) 0, SEEK_SET);
@@ -273,18 +188,18 @@
exit(1);
}
if (i < n) {
- fprintf(stderr, "%s: write truncated\n", av[ai]);
+ fprintf(stderr, "%s: write truncated\n", av[1]);
exit(1);
}
exit(0);
notelf:
- fprintf(stderr, "%s does not appear to be an ELF file\n", av[ai]);
+ fprintf(stderr, "%s does not appear to be an ELF file\n", av[1]);
exit(1);
nospace:
fprintf(stderr, "sorry, I can't find space in %s to put the note\n",
- av[ai]);
+ av[1]);
exit(1);
}