From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 21 Feb 2017 10:07:39 +0000 (+0100)
Subject: s390/nmi: purge tlbs after control register validation
X-Git-Tag: v5.15~11784^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5791d90d0046c6d74f19ab58fa774f50e463b0d9;p=platform%2Fkernel%2Flinux-starfive.git

s390/nmi: purge tlbs after control register validation

Play safe and purge all tlbs after the control registers that contain
the primary, secondary and home space asces have been validated.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index b76b5fe..80c093e 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -125,7 +125,8 @@ static int notrace s390_validate_registers(union mci mci, int umode)
 		s390_handle_damage();
 	} else {
 		asm volatile(
-			"	lctlg	0,15,0(%0)"
+			"	lctlg	0,15,0(%0)\n"
+			"	ptlb\n"
 			: : "a" (&S390_lowcore.cregs_save_area) : "memory");
 	}
 	if (!mci.fp) {