powerpc/nvram: Add compression to fit more oops output into NVRAM

Capture more than twice as much text from the printk buffer, and
compress it to fit it in the lnx,oops-log NVRAM partition.  You
can view the compressed text using the new (as of July 20) --unzip
option of the nvram command in the powerpc-utils package.

[BenH: Added select of ZLIB_DEFLATE]

Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 58625d1e7802..41f69ae79d4e 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -249,10 +249,12 @@ extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
 #define ERR_FLAG_ALREADY_LOGGED 0x0
 #define ERR_FLAG_BOOT           0x1     /* log was pulled from NVRAM on boot */
 #define ERR_TYPE_RTAS_LOG       0x2     /* from rtas event-scan */
-#define ERR_TYPE_KERNEL_PANIC   0x4     /* from panic() */
+#define ERR_TYPE_KERNEL_PANIC   0x4     /* from die()/panic() */
+#define ERR_TYPE_KERNEL_PANIC_GZ 0x8    /* ditto, compressed */
 
 /* All the types and not flags */
-#define ERR_TYPE_MASK   (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
+#define ERR_TYPE_MASK \
+        (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ)
 
 #define RTAS_DEBUG KERN_DEBUG "RTAS: "