修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/x86/include/asm/xen/hypercall.h
..
..
@@ -38,11 +38,11 @@
38
38
 #include <linux/errno.h>
39
39
 #include <linux/string.h>
40
40
 #include <linux/types.h>
41
+#include <linux/pgtable.h>
41
42
 
42
43
 #include <trace/events/xen.h>
43
44
 
44
45
 #include <asm/page.h>
45
-#include <asm/pgtable.h>
46
46
 #include <asm/smap.h>
47
47
 #include <asm/nospec-branch.h>
48
48
 
..
..
@@ -82,7 +82,7 @@
82
82
  *     - clobber the rest
83
83
  *
84
84
  * The result certainly isn't pretty, and it really shows up cpp's
85
- * weakness as as macro language.  Sorry.  (But let's just give thanks
85
+ * weakness as a macro language.  Sorry.  (But let's just give thanks
86
86
  * there aren't more than 5 arguments...)
87
87
  */
88
88
 
..
..
@@ -217,6 +217,22 @@
217
217
 	return (long)__res;
218
218
 }
219
219
 
220
+static __always_inline void __xen_stac(void)
221
+{
222
+	/*
223
+	 * Suppress objtool seeing the STAC/CLAC and getting confused about it
224
+	 * calling random code with AC=1.
225
+	 */
226
+	asm volatile(ANNOTATE_IGNORE_ALTERNATIVE
227
+		     ASM_STAC ::: "memory", "flags");
228
+}
229
+
230
+static __always_inline void __xen_clac(void)
231
+{
232
+	asm volatile(ANNOTATE_IGNORE_ALTERNATIVE
233
+		     ASM_CLAC ::: "memory", "flags");
234
+}
235
+
220
236
 static inline long
221
237
 privcmd_call(unsigned int call,
222
238
 	     unsigned long a1, unsigned long a2,
..
..
@@ -225,9 +241,9 @@
225
241
 {
226
242
 	long res;
227
243
 
228
-	stac();
244
+	__xen_stac();
229
245
 	res = xen_single_call(call, a1, a2, a3, a4, a5);
230
-	clac();
246
+	__xen_clac();
231
247
 
232
248
 	return res;
233
249
 }
..
..
@@ -335,15 +351,11 @@
335
351
 		return _hypercall4(int, update_va_mapping, va,
336
352
 				   new_val.pte, new_val.pte >> 32, flags);
337
353
 }
338
-extern int __must_check xen_event_channel_op_compat(int, void *);
339
354
 
340
355
 static inline int
341
356
 HYPERVISOR_event_channel_op(int cmd, void *arg)
342
357
 {
343
-	int rc = _hypercall2(int, event_channel_op, cmd, arg);
344
-	if (unlikely(rc == -ENOSYS))
345
-		rc = xen_event_channel_op_compat(cmd, arg);
346
-	return rc;
358
+	return _hypercall2(int, event_channel_op, cmd, arg);
347
359
 }
348
360
 
349
361
 static inline int
..
..
@@ -358,15 +370,10 @@
358
370
 	return _hypercall3(int, console_io, cmd, count, str);
359
371
 }
360
372
 
361
-extern int __must_check xen_physdev_op_compat(int, void *);
362
-
363
373
 static inline int
364
374
 HYPERVISOR_physdev_op(int cmd, void *arg)
365
375
 {
366
-	int rc = _hypercall2(int, physdev_op, cmd, arg);
367
-	if (unlikely(rc == -ENOSYS))
368
-		rc = xen_physdev_op_compat(cmd, arg);
369
-	return rc;
376
+	return _hypercall2(int, physdev_op, cmd, arg);
370
377
 }
371
378
 
372
379
 static inline int
..
..
@@ -433,9 +440,9 @@
433
440
 	domid_t dom, unsigned int nr_bufs, struct xen_dm_op_buf *bufs)
434
441
 {
435
442
 	int ret;
436
-	stac();
443
+	__xen_stac();
437
444
 	ret = _hypercall3(int, dm_op, dom, nr_bufs, bufs);
438
-	clac();
445
+	__xen_clac();
439
446
 	return ret;
440
447
 }
441
448