xref: /linux/arch/x86/include/asm/intel_ds.h (revision 7fc2cd2e4b398c57c9cf961cfea05eadbf34c05c)
1 #ifndef _ASM_INTEL_DS_H
2 #define _ASM_INTEL_DS_H
3 
4 #include <linux/percpu-defs.h>
5 
6 #define BTS_BUFFER_SIZE		(PAGE_SIZE << 4)
7 #define PEBS_BUFFER_SHIFT	4
8 #define PEBS_BUFFER_SIZE	(PAGE_SIZE << PEBS_BUFFER_SHIFT)
9 
10 /*
11  * The largest PEBS record could consume a page, ensure
12  * a record at least can be written after triggering PMI.
13  */
14 #define ARCH_PEBS_THRESH_MULTI	((PEBS_BUFFER_SIZE - PAGE_SIZE) >> PEBS_BUFFER_SHIFT)
15 #define ARCH_PEBS_THRESH_SINGLE	1
16 
17 /* The maximal number of PEBS events: */
18 #define MAX_PEBS_EVENTS_FMT4	8
19 #define MAX_PEBS_EVENTS		32
20 #define MAX_PEBS_EVENTS_MASK	GENMASK_ULL(MAX_PEBS_EVENTS - 1, 0)
21 #define MAX_FIXED_PEBS_EVENTS	16
22 
23 /*
24  * A debug store configuration.
25  *
26  * We only support architectures that use 64bit fields.
27  */
28 struct debug_store {
29 	u64	bts_buffer_base;
30 	u64	bts_index;
31 	u64	bts_absolute_maximum;
32 	u64	bts_interrupt_threshold;
33 	u64	pebs_buffer_base;
34 	u64	pebs_index;
35 	u64	pebs_absolute_maximum;
36 	u64	pebs_interrupt_threshold;
37 	u64	pebs_event_reset[MAX_PEBS_EVENTS + MAX_FIXED_PEBS_EVENTS];
38 } __aligned(PAGE_SIZE);
39 
40 DECLARE_PER_CPU_PAGE_ALIGNED(struct debug_store, cpu_debug_store);
41 
42 struct debug_store_buffers {
43 	char	bts_buffer[BTS_BUFFER_SIZE];
44 	char	pebs_buffer[PEBS_BUFFER_SIZE];
45 };
46 
47 #endif
48