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powerpc: Save DAR and DSISR in pt_regs on MCE 

We were not saving DAR and DSISR on MCE. Save then and also print the values
along with exception details in xmon.

Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aneesh Kumar K.V 2013-04-28 09:37:26 +00:00 committed by Benjamin Herrenschmidt
parent 4b8f63d92e
commit ce54152f42
2 changed files with 10 additions and 1 deletions
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9
arch/powerpc/kernel/exceptions-64s.S
View File

@ -693,9 +693,18 @@ slb_miss_user_pseries:
.align 7
.globl machine_check_common
machine_check_common:
mfspr r10,SPRN_DAR
std r10,PACA_EXGEN+EX_DAR(r13)
mfspr r10,SPRN_DSISR
stw r10,PACA_EXGEN+EX_DSISR(r13)
EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
FINISH_NAP
DISABLE_INTS
ld r3,PACA_EXGEN+EX_DAR(r13)
lwz r4,PACA_EXGEN+EX_DSISR(r13)
std r3,_DAR(r1)
std r4,_DSISR(r1)
bl .save_nvgprs
addi r3,r1,STACK_FRAME_OVERHEAD
bl .machine_check_exception

2
arch/powerpc/xmon/xmon.c
View File

@ -1430,7 +1430,7 @@ static void excprint(struct pt_regs *fp)
printf(" sp: %lx\n", fp->gpr[1]);
printf(" msr: %lx\n", fp->msr);
if (trap == 0x300 || trap == 0x380 || trap == 0x600) {
if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) {
printf(" dar: %lx\n", fp->dar);
if (trap != 0x380)
printf(" dsisr: %lx\n", fp->dsisr);