[RFC PATCH 11/14] powerpc/tm: Save MSR to PACA before RFID
From: Breno Leitao <leitao@debian.org>
Date: 2018-11-06 13:15:30
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
As other exit points, move SRR1 (MSR) into paca->tm_scratch, so, if there is a TM Bad Thing in RFID, it is easy to understand what was the SRR1 value being used. Signed-off-by: Breno Leitao <leitao@debian.org> --- arch/powerpc/kernel/entry_64.S | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index a86619edf29d..19e460b893e8 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S@@ -296,6 +296,10 @@ BEGIN_FTR_SECTION HMT_MEDIUM_LOW END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + std r8, PACATMSCRATCH(r13) +#endif + ld r13,GPR13(r1) /* only restore r13 if returning to usermode */ ld r2,GPR2(r1) ld r1,GPR1(r1)
--
2.19.0