https://github.com/torvalds/linux
Revision 9ff4cfb3fcfd48b49fdd9be7381b3be340853aa4 authored by Carsten Otte on 20 April 2011, 08:15:36 UTC, committed by Martin Schwidefsky on 20 April 2011, 08:15:44 UTC
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>
1 parent c7a29e5
History
Tip revision: 9ff4cfb3fcfd48b49fdd9be7381b3be340853aa4 authored by Carsten Otte on 20 April 2011, 08:15:36 UTC
[S390] kvm-390: Let kernel exit SIE instruction on work
Tip revision: 9ff4cfb
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