linux/arch/s390/kvm
Julius Niedworok aca411a4b1 KVM: s390: reset KVM_REQ_MMU_RELOAD if mapping the prefix failed
When triggering KVM_RUN without a user memory region being mapped
(KVM_SET_USER_MEMORY_REGION) a validity intercept occurs. This could
happen, if the user memory region was not mapped initially or if it
was unmapped after the vcpu is initialized. The function
kvm_s390_handle_requests checks for the KVM_REQ_MMU_RELOAD bit. The
check function always clears this bit. If gmap_mprotect_notify
returns an error code, the mapping failed, but the KVM_REQ_MMU_RELOAD
was not set anymore. So the next time kvm_s390_handle_requests is
called, the execution would fall trough the check for
KVM_REQ_MMU_RELOAD. The bit needs to be resetted, if
gmap_mprotect_notify returns an error code. Resetting the bit with
kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu) fixes the bug.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Julius Niedworok <jniedwor@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-08-12 09:11:08 +02:00
..
Kconfig KVM: halt_polling: provide a way to qualify wakeups during poll 2016-05-13 17:29:23 +02:00
Makefile KVM: s390: vsie: initial support for nested virtualization 2016-06-21 09:43:33 +02:00
diag.c KVM: s390: provide logging for diagnose 0x500 2016-06-10 12:07:26 +02:00
gaccess.c s390/mm: support real-space for gmap shadows 2016-06-20 09:55:02 +02:00
gaccess.h s390/mm: take ipte_lock during shadow faults 2016-06-20 09:54:40 +02:00
guestdbg.c KVM: s390: inject PER i-fetch events on applicable icpts 2016-07-05 12:02:56 +02:00
intercept.c - ARM: GICv3 ITS emulation and various fixes. Removal of the old 2016-08-02 16:11:27 -04:00
interrupt.c KVM: pass struct kvm to kvm_set_routing_entry 2016-07-14 09:03:56 +02:00
irq.h KVM: s390: irq routing for adapter interrupts. 2014-03-21 13:43:00 +01:00
kvm-s390.c KVM: s390: reset KVM_REQ_MMU_RELOAD if mapping the prefix failed 2016-08-12 09:11:08 +02:00
kvm-s390.h KVM: s390: inject PER i-fetch events on applicable icpts 2016-07-05 12:02:56 +02:00
priv.c KVM: s390: let ptff intercepts result in cc=3 2016-07-18 14:15:00 +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: Limit sthyi execution 2016-06-10 12:07:12 +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: remove kvm_guest_enter/exit wrappers 2016-07-01 11:03:21 +02:00