From 63a0d6b03b8e6fdd8c8ce5eec0ac04ef8e67d63f Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Mon, 26 Nov 2018 18:11:58 -0200 Subject: [PATCH] powerpc/tm: Save MSR to PACA before RFID 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 Signed-off-by: Michael Ellerman --- 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 7c2032e..5fe1431 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -291,6 +291,10 @@ 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) -- 2.7.4