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| author | Christian Borntraeger <borntraeger@linux.ibm.com> | 2022-05-30 11:27:06 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2022-06-01 12:03:16 +0200 |
| commit | 3ae11dbcfac906a8c3a480e98660a823130dc16a (patch) | |
| tree | b2bb2d6129a39829dc3e37eea1fb2b001cf4b9e7 /arch/s390 | |
| parent | 6d5946274df1fff539a7eece458a43be733d1db8 (diff) | |
| download | linux-3ae11dbcfac906a8c3a480e98660a823130dc16a.tar.bz2 | |
s390/mm: use non-quiescing sske for KVM switch to keyed guest
The switch to a keyed guest does not require a classic sske as the other
guest CPUs are not accessing the key before the switch is complete.
By using the NQ SSKE things are faster especially with multiple guests.
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Suggested-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20220530092706.11637-3-borntraeger@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/mm/pgtable.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 697df02362af..4909dcd762e8 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -748,7 +748,7 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep) pgste_val(pgste) |= PGSTE_GR_BIT | PGSTE_GC_BIT; ptev = pte_val(*ptep); if (!(ptev & _PAGE_INVALID) && (ptev & _PAGE_WRITE)) - page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 1); + page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 0); pgste_set_unlock(ptep, pgste); preempt_enable(); } |