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Date: Sat, 18 May 2024 09:44:53 -0000
From: "tip-bot2 for Uros Bizjak" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>, Ingo Molnar <mingo@...nel.org>,
Andy Lutomirski <luto@...nel.org>, Josh Poimboeuf <jpoimboe@...hat.com>,
Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/percpu] x86/percpu: Introduce the pcpu_binary_op() macro
The following commit has been merged into the x86/percpu branch of tip:
Commit-ID: 455ca134a7b2121dd739d425d3be313fb52f0651
Gitweb: https://git.kernel.org/tip/455ca134a7b2121dd739d425d3be313fb52f0651
Author: Uros Bizjak <ubizjak@...il.com>
AuthorDate: Tue, 30 Apr 2024 11:17:20 +02:00
Committer: Ingo Molnar <mingo@...nel.org>
CommitterDate: Sat, 18 May 2024 11:18:40 +02:00
x86/percpu: Introduce the pcpu_binary_op() macro
Introduce the pcpu_binary_op() macro, a copy of the percpu_to_op() macro.
Update percpu binary operators to use the new macro, since
percpu_to_op() will be re-purposed as a raw percpu write accessor
in a follow-up patch.
No functional change intended.
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/20240430091833.196482-1-ubizjak@gmail.com
---
arch/x86/include/asm/percpu.h | 47 +++++++++++++++++++++-------------
1 file changed, 30 insertions(+), 17 deletions(-)
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 3bedee1..cc40d8d 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -163,6 +163,19 @@ do { \
: [var] "+m" (__my_cpu_var(_var))); \
})
+#define percpu_binary_op(size, qual, op, _var, _val) \
+do { \
+ __pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val); \
+ if (0) { \
+ typeof(_var) pto_tmp__; \
+ pto_tmp__ = (_val); \
+ (void)pto_tmp__; \
+ } \
+ asm qual(__pcpu_op2_##size(op, "%[val]", __percpu_arg([var])) \
+ : [var] "+m" (__my_cpu_var(_var)) \
+ : [val] __pcpu_reg_imm_##size(pto_val__)); \
+} while (0)
+
/*
* Generate a percpu add to memory instruction and optimize code
* if one is added or subtracted.
@@ -182,7 +195,7 @@ do { \
else if (pao_ID__ == -1) \
percpu_unary_op(size, qual, "dec", var); \
else \
- percpu_to_op(size, qual, "add", var, val); \
+ percpu_binary_op(size, qual, "add", var, val); \
} while (0)
#define percpu_from_op(size, qual, op, _var) \
@@ -492,12 +505,12 @@ do { \
#define raw_cpu_add_1(pcp, val) percpu_add_op(1, , (pcp), val)
#define raw_cpu_add_2(pcp, val) percpu_add_op(2, , (pcp), val)
#define raw_cpu_add_4(pcp, val) percpu_add_op(4, , (pcp), val)
-#define raw_cpu_and_1(pcp, val) percpu_to_op(1, , "and", (pcp), val)
-#define raw_cpu_and_2(pcp, val) percpu_to_op(2, , "and", (pcp), val)
-#define raw_cpu_and_4(pcp, val) percpu_to_op(4, , "and", (pcp), val)
-#define raw_cpu_or_1(pcp, val) percpu_to_op(1, , "or", (pcp), val)
-#define raw_cpu_or_2(pcp, val) percpu_to_op(2, , "or", (pcp), val)
-#define raw_cpu_or_4(pcp, val) percpu_to_op(4, , "or", (pcp), val)
+#define raw_cpu_and_1(pcp, val) percpu_binary_op(1, , "and", (pcp), val)
+#define raw_cpu_and_2(pcp, val) percpu_binary_op(2, , "and", (pcp), val)
+#define raw_cpu_and_4(pcp, val) percpu_binary_op(4, , "and", (pcp), val)
+#define raw_cpu_or_1(pcp, val) percpu_binary_op(1, , "or", (pcp), val)
+#define raw_cpu_or_2(pcp, val) percpu_binary_op(2, , "or", (pcp), val)
+#define raw_cpu_or_4(pcp, val) percpu_binary_op(4, , "or", (pcp), val)
#define raw_cpu_xchg_1(pcp, val) raw_percpu_xchg_op(pcp, val)
#define raw_cpu_xchg_2(pcp, val) raw_percpu_xchg_op(pcp, val)
#define raw_cpu_xchg_4(pcp, val) raw_percpu_xchg_op(pcp, val)
@@ -505,12 +518,12 @@ do { \
#define this_cpu_add_1(pcp, val) percpu_add_op(1, volatile, (pcp), val)
#define this_cpu_add_2(pcp, val) percpu_add_op(2, volatile, (pcp), val)
#define this_cpu_add_4(pcp, val) percpu_add_op(4, volatile, (pcp), val)
-#define this_cpu_and_1(pcp, val) percpu_to_op(1, volatile, "and", (pcp), val)
-#define this_cpu_and_2(pcp, val) percpu_to_op(2, volatile, "and", (pcp), val)
-#define this_cpu_and_4(pcp, val) percpu_to_op(4, volatile, "and", (pcp), val)
-#define this_cpu_or_1(pcp, val) percpu_to_op(1, volatile, "or", (pcp), val)
-#define this_cpu_or_2(pcp, val) percpu_to_op(2, volatile, "or", (pcp), val)
-#define this_cpu_or_4(pcp, val) percpu_to_op(4, volatile, "or", (pcp), val)
+#define this_cpu_and_1(pcp, val) percpu_binary_op(1, volatile, "and", (pcp), val)
+#define this_cpu_and_2(pcp, val) percpu_binary_op(2, volatile, "and", (pcp), val)
+#define this_cpu_and_4(pcp, val) percpu_binary_op(4, volatile, "and", (pcp), val)
+#define this_cpu_or_1(pcp, val) percpu_binary_op(1, volatile, "or", (pcp), val)
+#define this_cpu_or_2(pcp, val) percpu_binary_op(2, volatile, "or", (pcp), val)
+#define this_cpu_or_4(pcp, val) percpu_binary_op(4, volatile, "or", (pcp), val)
#define this_cpu_xchg_1(pcp, nval) this_percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_2(pcp, nval) this_percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_4(pcp, nval) this_percpu_xchg_op(pcp, nval)
@@ -543,16 +556,16 @@ do { \
#define this_cpu_read_stable_8(pcp) percpu_stable_op(8, "mov", pcp)
#define raw_cpu_add_8(pcp, val) percpu_add_op(8, , (pcp), val)
-#define raw_cpu_and_8(pcp, val) percpu_to_op(8, , "and", (pcp), val)
-#define raw_cpu_or_8(pcp, val) percpu_to_op(8, , "or", (pcp), val)
+#define raw_cpu_and_8(pcp, val) percpu_binary_op(8, , "and", (pcp), val)
+#define raw_cpu_or_8(pcp, val) percpu_binary_op(8, , "or", (pcp), val)
#define raw_cpu_add_return_8(pcp, val) percpu_add_return_op(8, , pcp, val)
#define raw_cpu_xchg_8(pcp, nval) raw_percpu_xchg_op(pcp, nval)
#define raw_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(8, , pcp, oval, nval)
#define raw_cpu_try_cmpxchg_8(pcp, ovalp, nval) percpu_try_cmpxchg_op(8, , pcp, ovalp, nval)
#define this_cpu_add_8(pcp, val) percpu_add_op(8, volatile, (pcp), val)
-#define this_cpu_and_8(pcp, val) percpu_to_op(8, volatile, "and", (pcp), val)
-#define this_cpu_or_8(pcp, val) percpu_to_op(8, volatile, "or", (pcp), val)
+#define this_cpu_and_8(pcp, val) percpu_binary_op(8, volatile, "and", (pcp), val)
+#define this_cpu_or_8(pcp, val) percpu_binary_op(8, volatile, "or", (pcp), val)
#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(8, volatile, pcp, val)
#define this_cpu_xchg_8(pcp, nval) this_percpu_xchg_op(pcp, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(8, volatile, pcp, oval, nval)
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