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From: Breno Leitao <leitao@debian.org>
To: linuxppc-dev@lists.ozlabs.org
Cc: Breno Leitao <leitao@debian.org>,
	mikey@neuling.org, gromero@linux.vnet.ibm.com
Subject: [PATCH 1/4] powerpc/tm: Save MSR to PACA before RFID
Date: Mon, 26 Nov 2018 18:11:58 -0200	[thread overview]
Message-ID: <1543263121-9590-1-git-send-email-leitao@debian.org> (raw)

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 7b1693adff2a..ada1879a4e26 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -286,6 +286,10 @@ 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


             reply	other threads:[~2018-11-26 20:14 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-26 20:11 Breno Leitao [this message]
2018-11-26 20:11 ` [PATCH 2/4] powerpc/tm: Print scratch value Breno Leitao
2018-11-26 20:12 ` [PATCH 3/4] powerpc/tm: Unset MSR[TS] if not recheckpointing Breno Leitao
2018-11-26 20:12   ` Breno Leitao
2018-12-07 13:48   ` Michal Suchánek
2018-12-07 13:48     ` Michal Suchánek
2018-11-26 20:12 ` [PATCH 4/4] selftests/powerpc: Add checks for transactional sigreturn Breno Leitao
2018-12-07 13:45   ` Michal Suchánek
2018-12-23 13:27 ` [1/4] powerpc/tm: Save MSR to PACA before RFID Michael Ellerman

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