kernel_optimize_test/arch/s390/kvm
David Hildenbrand 4a5e7e381f KVM: s390: cmma: don't check entry content
We should never inject an exception after we manually rewound the PSW
(to retry the ESSA instruction in this case). This will mess up the PSW.
So this never worked and therefore never really triggered.

Looking at the details, we don't even have to perform any validity checks.
1. Bits 52-63 of an entry are stored as 0 by the hardware.
2. We are dealing with absolute addresses but only check for the prefix
   starting at address 0. This isn't correct and doesn't make much sense,
   cpus could still zap the prefix of other cpus. But as prefix pages
   cannot be swapped out without a notifier being called for the affected
   VCPU, a zap can never remove a protected prefix.

Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-05-04 10:57:38 +02:00
..
diag.c s390/mm: split arch/s390/mm/pgtable.c 2016-03-08 15:00:15 +01:00
gaccess.c KVM: s390: gaccess: implement instruction fetching mode 2016-02-10 13:12:51 +01:00
gaccess.h KVM: s390: gaccess: implement instruction fetching mode 2016-02-10 13:12:51 +01:00
guestdbg.c s390: Fix misspellings in comments 2016-03-08 15:00:17 +01:00
intercept.c KVM: s390: irq delivery should not rely on icptcode 2016-02-10 13:12:53 +01:00
interrupt.c KVM: s390: add clear I/O irq operation for FLIC 2016-04-20 14:27:32 +02:00
irq.h KVM: s390: irq routing for adapter interrupts. 2014-03-21 13:43:00 +01:00
Kconfig KVM: s390: Enable the KVM-VFIO device 2016-01-26 15:40:17 +01:00
kvm-s390.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-03-16 10:47:45 -07:00
kvm-s390.h KVM: s390: allocate only one DMA page per VM 2016-03-08 13:57:54 +01:00
Makefile KVM: s390: Enable the KVM-VFIO device 2016-01-26 15:40:17 +01:00
priv.c KVM: s390: cmma: don't check entry content 2016-05-04 10:57:38 +02:00
sigp.c KVM: s390: fix wrong lookup of VCPUs by array index 2015-11-19 14:47:43 +01:00
trace-s390.h KVM: s390: obey kptr_restrict in traces 2015-12-15 17:06:32 +01:00
trace.h KVM: s390: interpretive execution of SIGP EXTERNAL CALL 2014-05-16 14:57:28 +02:00