linux-kernel - [PATCH v6 04/28] s390: Move sske

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Message-ID: <20251222165033.162329-5-imbrenda@linux.ibm.com>
Date: Mon, 22 Dec 2025 17:50:09 +0100
From: Claudio Imbrenda <imbrenda@...ux.ibm.com>
To: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        borntraeger@...ibm.com, frankja@...ux.ibm.com, nsg@...ux.ibm.com,
        nrb@...ux.ibm.com, seiden@...ux.ibm.com, gra@...ux.ibm.com,
        schlameuss@...ux.ibm.com, hca@...ux.ibm.com, svens@...ux.ibm.com,
        agordeev@...ux.ibm.com, gor@...ux.ibm.com, david@...hat.com,
        gerald.schaefer@...ux.ibm.com
Subject: [PATCH v6 04/28] s390: Move sske_frame() to a header

Move the sske_frame() function to asm/pgtable.h, so it can be used in
other modules too.

Opportunistically convert the .insn opcode specification to the
appropriate mnemonic.

Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@...ux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@...ux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@...ux.ibm.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@...ux.ibm.com>
---
 arch/s390/include/asm/pgtable.h | 7 +++++++
 arch/s390/mm/pageattr.c         | 7 -------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 8194a2b12ecf..73c30b811b98 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1136,6 +1136,13 @@ static inline pte_t pte_mkhuge(pte_t pte)
 }
 #endif
 
+static inline unsigned long sske_frame(unsigned long addr, unsigned char skey)
+{
+	asm volatile("sske %[skey],%[addr],1"
+		     : [addr] "+a" (addr) : [skey] "d" (skey));
+	return addr;
+}
+
 #define IPTE_GLOBAL	0
 #define	IPTE_LOCAL	1
 
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index d3ce04a4b248..bb29c38ae624 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -16,13 +16,6 @@
 #include <asm/asm.h>
 #include <asm/set_memory.h>
 
-static inline unsigned long sske_frame(unsigned long addr, unsigned char skey)
-{
-	asm volatile(".insn rrf,0xb22b0000,%[skey],%[addr],1,0"
-		     : [addr] "+a" (addr) : [skey] "d" (skey));
-	return addr;
-}
-
 void __storage_key_init_range(unsigned long start, unsigned long end)
 {
 	unsigned long boundary, size;
-- 
2.52.0