From: Carsten Otte <cotte@de.ibm.com>
Date: Wed, 20 Apr 2011 08:15:36 +0000 (+0200)
Subject: [S390] kvm-390: Let kernel exit SIE instruction on work
X-Git-Tag: v2.6.39-rc5~4^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ff4cfb3fcfd48b49fdd9be7381b3be340853aa4;p=pandora-kernel.git

[S390] kvm-390: Let kernel exit SIE instruction on work

From: Christian Borntraeger <borntraeger@de.ibm.com>

This patch fixes the sie exit on interrupts. The low level
interrupt handler returns to the PSW address in pt_regs and not
to the PSW address in the lowcore.
Without this fix a cpu bound guest might never leave guest state
since the host interrupt handler would blindly return to the
SIE instruction, even on need_resched and friends.

Cc: stable@kernel.org
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

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