aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/x86/include/asm/percpu.h86
1 files changed, 72 insertions, 14 deletions
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 4c170ccc72ed..66a272dfd8b8 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -103,6 +103,64 @@ do { \
103 } \ 103 } \
104} while (0) 104} while (0)
105 105
106/*
107 * Generate a percpu add to memory instruction and optimize code
108 * if a one is added or subtracted.
109 */
110#define percpu_add_op(var, val) \
111do { \
112 typedef typeof(var) pao_T__; \
113 const int pao_ID__ = (__builtin_constant_p(val) && \
114 ((val) == 1 || (val) == -1)) ? (val) : 0; \
115 if (0) { \
116 pao_T__ pao_tmp__; \
117 pao_tmp__ = (val); \
118 } \
119 switch (sizeof(var)) { \
120 case 1: \
121 if (pao_ID__ == 1) \
122 asm("incb "__percpu_arg(0) : "+m" (var)); \
123 else if (pao_ID__ == -1) \
124 asm("decb "__percpu_arg(0) : "+m" (var)); \
125 else \
126 asm("addb %1, "__percpu_arg(0) \
127 : "+m" (var) \
128 : "qi" ((pao_T__)(val))); \
129 break; \
130 case 2: \
131 if (pao_ID__ == 1) \
132 asm("incw "__percpu_arg(0) : "+m" (var)); \
133 else if (pao_ID__ == -1) \
134 asm("decw "__percpu_arg(0) : "+m" (var)); \
135 else \
136 asm("addw %1, "__percpu_arg(0) \
137 : "+m" (var) \
138 : "ri" ((pao_T__)(val))); \
139 break; \
140 case 4: \
141 if (pao_ID__ == 1) \
142 asm("incl "__percpu_arg(0) : "+m" (var)); \
143 else if (pao_ID__ == -1) \
144 asm("decl "__percpu_arg(0) : "+m" (var)); \
145 else \
146 asm("addl %1, "__percpu_arg(0) \
147 : "+m" (var) \
148 : "ri" ((pao_T__)(val))); \
149 break; \
150 case 8: \
151 if (pao_ID__ == 1) \
152 asm("incq "__percpu_arg(0) : "+m" (var)); \
153 else if (pao_ID__ == -1) \
154 asm("decq "__percpu_arg(0) : "+m" (var)); \
155 else \
156 asm("addq %1, "__percpu_arg(0) \
157 : "+m" (var) \
158 : "re" ((pao_T__)(val))); \
159 break; \
160 default: __bad_percpu_size(); \
161 } \
162} while (0)
163
106#define percpu_from_op(op, var, constraint) \ 164#define percpu_from_op(op, var, constraint) \
107({ \ 165({ \
108 typeof(var) pfo_ret__; \ 166 typeof(var) pfo_ret__; \
@@ -144,8 +202,8 @@ do { \
144#define percpu_read(var) percpu_from_op("mov", var, "m" (var)) 202#define percpu_read(var) percpu_from_op("mov", var, "m" (var))
145#define percpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var))) 203#define percpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
146#define percpu_write(var, val) percpu_to_op("mov", var, val) 204#define percpu_write(var, val) percpu_to_op("mov", var, val)
147#define percpu_add(var, val) percpu_to_op("add", var, val) 205#define percpu_add(var, val) percpu_add_op(var, val)
148#define percpu_sub(var, val) percpu_to_op("sub", var, val) 206#define percpu_sub(var, val) percpu_add_op(var, -(val))
149#define percpu_and(var, val) percpu_to_op("and", var, val) 207#define percpu_and(var, val) percpu_to_op("and", var, val)
150#define percpu_or(var, val) percpu_to_op("or", var, val) 208#define percpu_or(var, val) percpu_to_op("or", var, val)
151#define percpu_xor(var, val) percpu_to_op("xor", var, val) 209#define percpu_xor(var, val) percpu_to_op("xor", var, val)
@@ -157,9 +215,9 @@ do { \
157#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) 215#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
158#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val) 216#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
159#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val) 217#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
160#define __this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val) 218#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
161#define __this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val) 219#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
162#define __this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val) 220#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
163#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val) 221#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
164#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val) 222#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
165#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val) 223#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -176,9 +234,9 @@ do { \
176#define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val) 234#define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
177#define this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val) 235#define this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
178#define this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val) 236#define this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
179#define this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val) 237#define this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
180#define this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val) 238#define this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
181#define this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val) 239#define this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
182#define this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val) 240#define this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
183#define this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val) 241#define this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
184#define this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val) 242#define this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -189,9 +247,9 @@ do { \
189#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val) 247#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
190#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val) 248#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
191 249
192#define irqsafe_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val) 250#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
193#define irqsafe_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val) 251#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
194#define irqsafe_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val) 252#define irqsafe_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
195#define irqsafe_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val) 253#define irqsafe_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
196#define irqsafe_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val) 254#define irqsafe_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
197#define irqsafe_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val) 255#define irqsafe_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
@@ -209,19 +267,19 @@ do { \
209#ifdef CONFIG_X86_64 267#ifdef CONFIG_X86_64
210#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp)) 268#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
211#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val) 269#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
212#define __this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val) 270#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
213#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 271#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
214#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 272#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
215#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 273#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
216 274
217#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp)) 275#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
218#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val) 276#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
219#define this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val) 277#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
220#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 278#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
221#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 279#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
222#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 280#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
223 281
224#define irqsafe_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val) 282#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
225#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 283#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
226#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 284#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
227#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 285#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-03 03:14:09 -0500