Commit 63a0d6b0 authored Nov 26, 2018 by Breno Leitao Committed by Michael Ellerman Dec 21, 2018

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 <leitao@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent e1c3743e

arch/powerpc/kernel/entry_64.S

+4 −0

Original line number	Diff line number	Diff line
		@@ -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)