Heiko Carstens 44bada2821 KVM: s390: fix guarded storage control register handling ... store_regs_fmt2() has an ordering problem: first the guarded storage facility is enabled on the local cpu, then preemption disabled, and then the STGSC (store guarded storage controls) instruction is executed. If the process gets scheduled away between enabling the guarded storage facility and before preemption is disabled, this might lead to a special operation exception and therefore kernel crash as soon as the process is scheduled back and the STGSC instruction is executed. Fixes: 4e0b1ab72b ("KVM: s390: gs support for kvm guests") Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Cc: <stable@vger.kernel.org> # 4.12 Link: https://lore.kernel.org/r/20210415080127.1061275-1-hca@linux.ibm.com Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>		2021-04-15 15:35:38 +02:00
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appldata	s390/appldata: use struct_size() helper	2020-06-29 16:32:34 +02:00
boot	s390: uv: Fix sysfs max number of VCPUs reporting	2021-01-27 13:00:04 +01:00
configs	Modules updates for v5.12	2021-02-23 10:15:33 -08:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2021-02-21 17:23:56 -08:00
hypfs	s390/hypfs: use store_tod_clock_ext()	2021-02-13 17:17:55 +01:00
include	KVM: s390: diag9c (directed yield) forwarding	2021-03-09 10:16:26 +01:00
kernel	KVM: s390: diag9c (directed yield) forwarding	2021-03-09 10:16:26 +01:00
kvm	KVM: s390: fix guarded storage control register handling	2021-04-15 15:35:38 +02:00
lib	s390: convert to generic entry	2021-01-19 12:29:26 +01:00
mm	s390 updates for the 5.12 merge window #2	2021-02-26 14:12:32 -08:00
net	bpf: Rename BPF_XADD and prepare to encode other atomics in .imm	2021-01-14 18:34:29 -08:00
pci	s390 updates for the 5.12 merge window	2021-02-21 13:40:06 -08:00
purgatory	- Add support for the hugetlb_cma command line option to allocate gigantic	2020-12-14 16:22:26 -08:00
tools	s390/opcodes: rename selhhhr to selfhr	2021-02-24 00:31:22 +01:00
Kbuild	s390/numa: move code to arch/s390/kernel	2020-08-11 18:16:55 +02:00
Kconfig	Rework of the X86 irq stack handling:	2021-02-24 16:32:23 -08:00
Kconfig.debug	s390: convert to generic entry	2021-01-19 12:29:26 +01:00
Makefile	arch: s390: Remove CONFIG_OPROFILE support	2021-01-29 10:05:51 +05:30