diff options
| author | Nina Schoetterl-Glausch <nsg@linux.ibm.com> | 2023-12-19 17:08:51 +0300 |
|---|---|---|
| committer | Janosch Frank <frankja@linux.ibm.com> | 2023-12-23 12:41:09 +0300 |
| commit | 682dbf430d27bc0e23d8d6921116b4f77f5dc9c6 (patch) | |
| tree | 7d15afcec67aafd2fd7027251e61c14c032adddf /arch/s390/include | |
| parent | 2731d605d5478052a10ac5a7c80f7aa7e1788cc5 (diff) | |
| download | linux-682dbf430d27bc0e23d8d6921116b4f77f5dc9c6.tar.xz | |
KVM: s390: vsie: Fix length of facility list shadowed
The length of the facility list accessed when interpretively executing
STFLE is the same as the hosts facility list (in case of format-0)
The memory following the facility list doesn't need to be accessible.
The current VSIE implementation accesses a fixed length that exceeds the
guest/host facility list length and can therefore wrongly inject a
validity intercept.
Instead, find out the host facility list length by running STFLE and
copy only as much as necessary when shadowing.
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20231219140854.1042599-3-nsg@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-ID: <20231219140854.1042599-3-nsg@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/facility.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h index 94b6919026df..796007125dff 100644 --- a/arch/s390/include/asm/facility.h +++ b/arch/s390/include/asm/facility.h @@ -111,4 +111,10 @@ static inline void stfle(u64 *stfle_fac_list, int size) preempt_enable(); } +/** + * stfle_size - Actual size of the facility list as specified by stfle + * (number of double words) + */ +unsigned int stfle_size(void); + #endif /* __ASM_FACILITY_H */ |