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linux/arch/s390/kvm
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Heiko Carstens df3a787b3a KVM: s390: gaccess: fix real-space designation asce handling for gmap shadows 
commit addb63c18a upstream.

For real-space designation asces the asce origin part is only a token.
The asce token origin must not be used to generate an effective
address for storage references. This however is erroneously done
within kvm_s390_shadow_tables().

Furthermore within the same function the wrong parts of virtual
addresses are used to generate a corresponding real address
(e.g. the region second index is used as region first index).

Both of the above can result in incorrect address translations. Only
for real space designations with a token origin of zero and addresses
below one megabyte the translation was correct.

Furthermore replace a "!asce.r" statement with a "!*fake" statement to
make it more obvious that a specific condition has nothing to do with
the architecture, but with the fake handling of real space designations.

Fixes: 3218f7094b ("s390/mm: support real-space for gmap shadows")
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-06-29 13:00:28 +02:00
..
diag.c KVM: s390: provide logging for diagnose 0x500 2016-06-10 12:07:26 +02:00
gaccess.c KVM: s390: gaccess: fix real-space designation asce handling for gmap shadows 2017-06-29 13:00:28 +02:00
gaccess.h s390/mm: take ipte_lock during shadow faults 2016-06-20 09:54:40 +02:00
guestdbg.c KVM: s390: Use memdup_user() rather than duplicating code 2016-09-08 13:40:55 +02:00
intercept.c KVM: s390: reject invalid modes for runtime instrumentation 2016-10-20 20:06:12 +02:00
interrupt.c KVM: s390: allow 255 VCPUs when sca entries aren't used 2016-09-08 13:40:53 +02:00
irq.h KVM: s390: irq routing for adapter interrupts. 2014-03-21 13:43:00 +01:00
Kconfig KVM: halt_polling: provide a way to qualify wakeups during poll 2016-05-13 17:29:23 +02:00
kvm-s390.c KVM: s390: Disable dirty log retrieval for UCONTROL guests 2017-03-15 10:02:40 +08:00
kvm-s390.h KVM: s390: allow 255 VCPUs when sca entries aren't used 2016-09-08 13:40:53 +02:00
Makefile KVM: s390: vsie: initial support for nested virtualization 2016-06-21 09:43:33 +02:00
priv.c KVM: s390: lazy enable RI 2016-09-08 13:40:39 +02:00
sigp.c KVM: s390: don't use CPUSTAT_WAIT to detect if a VCPU is idle 2016-06-21 09:43:45 +02:00
sthyi.c KVM: s390: Fix STHYI buffer alignment for diag224 2016-10-26 13:46:44 +02:00
trace-s390.h KVM: s390: obey kptr_restrict in traces 2015-12-15 17:06:32 +01:00
trace.h KVM: s390: trace and count all skey intercepts 2016-06-10 12:07:31 +02:00
vsie.c KVM: s390: vsie: fix riccbd 2016-09-05 13:48:50 +02:00