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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v1 1/8] powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32
Date: Wed, 10 Mar 2021 17:57:00 +0000 (UTC)	[thread overview]
Message-ID: <ccc08a16eea682d6fa4acc957ffe34003a8f0844.1615398498.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1615398498.git.christophe.leroy@csgroup.eu>

ppc32 has an efficiant 64 bits __put_user(), so also use it in
order to unroll loops more.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/include/asm/uaccess.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 78e2a3990eab..2c09cff205ef 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -494,9 +494,9 @@ do {									\
 	size_t _len = (l);						\
 	int _i;								\
 									\
-	for (_i = 0; _i < (_len & ~(sizeof(long) - 1)); _i += sizeof(long))		\
-		unsafe_put_user(*(long*)(_src + _i), (long __user *)(_dst + _i), e); \
-	if (IS_ENABLED(CONFIG_PPC64) && (_len & 4)) {			\
+	for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64))	\
+		unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \
+	if (_len & 4) {							\
 		unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \
 		_i += 4;						\
 	}								\
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1 1/8] powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32
Date: Wed, 10 Mar 2021 17:57:00 +0000 (UTC)	[thread overview]
Message-ID: <ccc08a16eea682d6fa4acc957ffe34003a8f0844.1615398498.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1615398498.git.christophe.leroy@csgroup.eu>

ppc32 has an efficiant 64 bits __put_user(), so also use it in
order to unroll loops more.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/include/asm/uaccess.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 78e2a3990eab..2c09cff205ef 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -494,9 +494,9 @@ do {									\
 	size_t _len = (l);						\
 	int _i;								\
 									\
-	for (_i = 0; _i < (_len & ~(sizeof(long) - 1)); _i += sizeof(long))		\
-		unsafe_put_user(*(long*)(_src + _i), (long __user *)(_dst + _i), e); \
-	if (IS_ENABLED(CONFIG_PPC64) && (_len & 4)) {			\
+	for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64))	\
+		unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \
+	if (_len & 4) {							\
 		unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \
 		_i += 4;						\
 	}								\
-- 
2.25.0


  reply	other threads:[~2021-03-10 17:57 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-10 17:56 [PATCH v1 0/8] Miscellaneous user access improvement Christophe Leroy
2021-03-10 17:56 ` Christophe Leroy
2021-03-10 17:57 ` Christophe Leroy [this message]
2021-03-10 17:57   ` [PATCH v1 1/8] powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32 Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 2/8] powerpc/uaccess: Swap clear_user() and __clear_user() Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 3/8] powerpc/uaccess: Move copy_mc_xxx() functions down Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 4/8] powerpc/syscalls: Use sys_old_select() in ppc_select() Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 5/8] powerpc/lib: Don't use __put_user_asm_goto() outside of uaccess.h Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 6/8] powerpc/net: Switch csum_and_copy_{to/from}_user to user_access block Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 7/8] powerpc/futex: Switch " Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-10 17:57 ` [PATCH v1 8/8] powerpc/ptrace: Convert gpr32_set_common() to user access block Christophe Leroy
2021-03-10 17:57   ` Christophe Leroy
2021-03-31  1:09 ` [PATCH v1 0/8] Miscellaneous user access improvement Michael Ellerman
2021-03-31  1:09   ` Michael Ellerman

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