[RFC PATCH 17/17] powerpc: Save DAR and DSISR in pt_regs on MCE
From: Aneesh Kumar K.V <hidden>
Date: 2013-02-18 10:28:47
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: "Aneesh Kumar K.V" <redacted> We were not saving DAR and DSISR on MCE. Save then and also print the values along with exception details in xmon. Signed-off-by: Aneesh Kumar K.V <redacted> --- arch/powerpc/kernel/exceptions-64s.S | 9 +++++++++ arch/powerpc/xmon/xmon.c | 2 +- 2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 0e9c48c..d02e730 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S@@ -640,9 +640,18 @@ 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
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 1f8d2f1..a72e490 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c@@ -1423,7 +1423,7 @@ 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);
--
1.7.10