From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Janis Schoetterl-Glausch <scgl@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>
Subject: [PATCH 5.18 01/11] s390/mm: use non-quiescing sske for KVM switch to keyed guest
Date: Thu, 23 Jun 2022 18:45:13 +0200 [thread overview]
Message-ID: <20220623164322.359407032@linuxfoundation.org> (raw)
In-Reply-To: <20220623164322.315085512@linuxfoundation.org>
From: Christian Borntraeger <borntraeger@linux.ibm.com>
commit 3ae11dbcfac906a8c3a480e98660a823130dc16a upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/s390/mm/pgtable.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -748,7 +748,7 @@ void ptep_zap_key(struct mm_struct *mm,
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();
}
next prev parent reply other threads:[~2022-06-23 18:24 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-23 16:45 [PATCH 5.18 00/11] 5.18.7-rc1 review Greg Kroah-Hartman
2022-06-23 16:45 ` Greg Kroah-Hartman [this message]
2022-06-23 16:45 ` [PATCH 5.18 02/11] zonefs: fix zonefs_iomap_begin() for reads Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 03/11] wifi: rtlwifi: remove always-true condition pointed out by GCC 12 Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 04/11] eth: sun: cassini: remove dead code Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 05/11] net: wwan: iosm: remove pointless null check Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 06/11] x86/boot: Wrap literal addresses in absolute_pointer() Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 07/11] fsnotify: introduce mark type iterator Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 08/11] fsnotify: consistent behavior for parent not watching children Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 09/11] bpf: Fix calling global functions from BPF_PROG_TYPE_EXT programs Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 10/11] selftests/bpf: Add selftest for calling global functions from freplace Greg Kroah-Hartman
2022-06-23 16:45 ` [PATCH 5.18 11/11] dt-bindings: nvmem: sfp: Add clock properties Greg Kroah-Hartman
2022-06-23 20:33 ` [PATCH 5.18 00/11] 5.18.7-rc1 review Florian Fainelli
2022-06-23 23:31 ` Zan Aziz
2022-06-24 0:51 ` Shuah Khan
2022-06-24 7:30 ` Ron Economos
2022-06-24 8:21 ` Fenil Jain
2022-06-24 9:25 ` Bagas Sanjaya
2022-06-24 9:29 ` Jon Hunter
2022-06-24 10:39 ` Sudip Mukherjee
2022-06-24 16:07 ` Rudi Heitbaum
2022-06-24 16:38 ` Justin Forbes
2022-06-24 23:36 ` Guenter Roeck
2022-06-25 13:24 ` Naresh Kamboju
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