linux-kernel - [PATCH 7/9] powerpc: Add little endian variants of LHZX

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Message-ID: <a3d5db51c2e0f115e271b507c89e5af96bfeb015.1723817900.git.christophe.leroy@csgroup.eu>
Date: Fri, 16 Aug 2024 16:36:54 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Naveen N Rao <naveen@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	"Theodore Ts'o" <tytso@....edu>,
	"Jason A. Donenfeld" <Jason@...c4.com>,
	Andy Lutomirski <luto@...nel.org>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Arnd Bergmann <arnd@...db.de>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
	linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-arch@...r.kernel.org
Subject: [PATCH 7/9] powerpc: Add little endian variants of LHZX_BE and friends

To support getrandom in VDSO which is based on little endian storage,
add macros equivalent to LHZX_BE for little endian accesses.

And move it outside of __powerpc64__ #ifdef so that it can also be
used for PPC32.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/asm-compat.h | 40 +++++++++++++++++----------
 1 file changed, 26 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/include/asm/asm-compat.h b/arch/powerpc/include/asm/asm-compat.h
index 2bc53c646ccd..ef8e79ae669a 100644
--- a/arch/powerpc/include/asm/asm-compat.h
+++ b/arch/powerpc/include/asm/asm-compat.h
@@ -25,20 +25,6 @@
 #define PPC_LR_STKOFF	16
 #define PPC_MIN_STKFRM	112
 
-#ifdef __BIG_ENDIAN__
-#define LHZX_BE	stringify_in_c(lhzx)
-#define LWZX_BE	stringify_in_c(lwzx)
-#define LDX_BE	stringify_in_c(ldx)
-#define STWX_BE	stringify_in_c(stwx)
-#define STDX_BE	stringify_in_c(stdx)
-#else
-#define LHZX_BE	stringify_in_c(lhbrx)
-#define LWZX_BE	stringify_in_c(lwbrx)
-#define LDX_BE	stringify_in_c(ldbrx)
-#define STWX_BE	stringify_in_c(stwbrx)
-#define STDX_BE	stringify_in_c(stdbrx)
-#endif
-
 #else /* 32-bit */
 
 /* operations for longs and pointers */
@@ -61,4 +47,30 @@
 
 #endif
 
+#ifdef __BIG_ENDIAN__
+#define LHZX_BE	stringify_in_c(lhzx)
+#define LWZX_BE	stringify_in_c(lwzx)
+#define LDX_BE	stringify_in_c(ldx)
+#define STWX_BE	stringify_in_c(stwx)
+#define STDX_BE	stringify_in_c(stdx)
+
+#define LHZX_LE	stringify_in_c(lhbrx)
+#define LWZX_LE	stringify_in_c(lwbrx)
+#define LDX_LE	stringify_in_c(ldbrx)
+#define STWX_LE	stringify_in_c(stwbrx)
+#define STDX_LE	stringify_in_c(stdbrx)
+#else
+#define LHZX_BE	stringify_in_c(lhbrx)
+#define LWZX_BE	stringify_in_c(lwbrx)
+#define LDX_BE	stringify_in_c(ldbrx)
+#define STWX_BE	stringify_in_c(stwbrx)
+#define STDX_BE	stringify_in_c(stdbrx)
+
+#define LHZX_LE	stringify_in_c(lhzx)
+#define LWZX_LE	stringify_in_c(lwzx)
+#define LDX_LE	stringify_in_c(ldx)
+#define STWX_LE	stringify_in_c(stwx)
+#define STDX_LE	stringify_in_c(stdx)
+#endif
+
 #endif /* _ASM_POWERPC_ASM_COMPAT_H */
-- 
2.44.0