Thomas Huth f6550976fe KVM: s390: vsie: Fix the initialization of the epoch extension (epdx) field ... commit 0dd4cdccda upstream. We recently experienced some weird huge time jumps in nested guests when rebooting them in certain cases. After adding some debug code to the epoch handling in vsie.c (thanks to David Hildenbrand for the idea!), it was obvious that the "epdx" field (the multi-epoch extension) did not get set to 0xff in case the "epoch" field was negative. Seems like the code misses to copy the value from the epdx field from the guest to the shadow control block. By doing so, the weird time jumps are gone in our scenarios. Link: https://bugzilla.redhat.com/show_bug.cgi?id=2140899 Fixes: 8fa1696ea7 ("KVM: s390: Multiple Epoch Facility support") Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Cc: stable@vger.kernel.org # 4.19+ Link: https://lore.kernel.org/r/20221123090833.292938-1-thuth@redhat.com Message-Id: <20221123090833.292938-1-thuth@redhat.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-12-14 11:37:20 +01:00
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appldata	…
boot	s390/boot: add secure boot trailer	2022-11-10 18:15:32 +01:00
configs	…
crypto	s390/archrandom: simplify back to earlier design and initialize earlier	2022-07-07 17:53:24 +02:00
hypfs	s390/hypfs: avoid error message under KVM	2022-09-05 10:30:11 +02:00
include	s390/futex: add missing EX_TABLE entry to __futex_atomic_op()	2022-11-03 23:59:13 +09:00
kernel	s390/crashdump: fix TOD programmable field size	2022-12-02 17:41:07 +01:00
kvm	KVM: s390: vsie: Fix the initialization of the epoch extension (epdx) field	2022-12-14 11:37:20 +01:00
lib	s390/uaccess: add missing EX_TABLE entries to __clear_user()	2022-11-10 18:15:32 +01:00
mm	s390/mm: do not trigger write fault when vma does not allow VM_WRITE	2022-08-31 17:16:48 +02:00
net	…
pci	s390/pci: add missing EX_TABLE entries to __pcistg_mio_inuser()/__pcilg_mio_inuser()	2022-11-03 23:59:13 +09:00
purgatory	…
tools	…
Kbuild	…
Kconfig	s390: remove unneeded 'select BUILD_BIN2C'	2022-07-07 17:53:27 +02:00
Kconfig.debug	…
Makefile	s390: disable -Warray-bounds	2022-05-18 10:26:52 +02:00