diff mbox series

[kvm-unit-tests,GIT,PULL,01/12] s390x: sie: Only overwrite r3 if it isn't needed anymore

Message ID 20210622082042.13831-2-frankja@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series [kvm-unit-tests,GIT,PULL,01/12] s390x: sie: Only overwrite r3 if it isn't needed anymore | expand

Commit Message

Janosch Frank June 22, 2021, 8:20 a.m. UTC 
The lmg overwrites r3 which we later use to reference the fprs and fpc.
Let's do the lmg at the end where overwriting is fine.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
---
 s390x/cpu.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/s390x/cpu.S b/s390x/cpu.S
index e2ad56c8..82b5e25d 100644
--- a/s390x/cpu.S
+++ b/s390x/cpu.S
@@ -81,11 +81,11 @@  sie64a:
 	stg	%r3,__SF_SIE_SAVEAREA(%r15)	# save guest register save area
 
 	# Load guest's gprs, fprs and fpc
-	lmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r3)
 	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
 	ld	\i, \i * 8 + SIE_SAVEAREA_GUEST_FPRS(%r3)
 	.endr
 	lfpc	SIE_SAVEAREA_GUEST_FPC(%r3)
+	lmg	%r0,%r13,SIE_SAVEAREA_GUEST_GRS(%r3)
 
 	# Move scb ptr into r14 for the sie instruction
 	lg	%r14,__SF_SIE_CONTROL(%r15)