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55680890ea
kernel_optimize_test/arch/s390
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Christian Borntraeger 55680890ea KVM: s390: do not clobber registers during guest reset/store status 
The initial CPU reset clobbers the userspace fpc and the store status
ioctl clobbers the guest acrs + fpr.  As these calls are only done via
ioctl (and not via vcpu_run), no CPU context is loaded, so we can (and
must) act directly on the sync regs, not on the thread context.

Cc: stable@kernel.org
Fixes: e1788bb995 ("KVM: s390: handle floating point registers in the run ioctl not in vcpu_put/load")
Fixes: 31d8b8d41a ("KVM: s390: handle access registers in the run ioctl not in vcpu_put/load")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20200131100205.74720-2-frankja@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2020-01-31 12:49:24 +01:00
..
appldata proc/sysctl: add shared variables for range check 2019-07-18 17:08:07 -07:00
boot s390/kaslr: store KASLR offset for early dumps 2019-11-30 10:52:45 +01:00
configs locking/refcount: Consolidate implementations of refcount_t 2019-11-25 09:15:32 +01:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-11-25 19:49:58 -08:00
hypfs Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-09-24 12:33:34 -07:00
include s390: remove last diag 0x44 caller 2019-12-11 19:53:24 +01:00
kernel s390: remove last diag 0x44 caller 2019-12-11 19:53:24 +01:00
kvm KVM: s390: do not clobber registers during guest reset/store status 2020-01-31 12:49:24 +01:00
lib s390/test_unwind: fix spelling mistake "reqister" -> "register" 2019-12-11 19:53:23 +01:00
mm s390/kasan: add KASAN_VMALLOC support 2019-12-11 19:56:59 +01:00
net s390/bpf: Remove JITed image size limitations 2019-11-18 19:51:16 -08:00
numa s390/numa: correct early_param handling 2019-08-26 12:51:17 +02:00
oprofile
pci pci-v5.5-changes 2019-12-03 13:58:22 -08:00
purgatory crypto: sha256 - Merge crypto/sha256.h into crypto/sha.h 2019-09-05 14:54:54 +10:00
scripts s390/build: use size command to perform empty .bss check 2019-08-08 14:36:53 +02:00
tools s390: add support for IBM z15 machines 2019-09-13 12:19:14 +02:00
Kbuild
Kconfig s390/kasan: add KASAN_VMALLOC support 2019-12-11 19:56:59 +01:00
Kconfig.debug
Makefile s390: remove compat vdso code 2019-12-01 12:48:49 +01:00