1#ifndef __XEN_PUBLIC_XENPMU_H__
2#define __XEN_PUBLIC_XENPMU_H__
3
4#include "xen.h"
5
6#define XENPMU_VER_MAJ    0
7#define XENPMU_VER_MIN    1
8
9/*
10 * ` enum neg_errnoval
11 * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args);
12 *
13 * @cmd  == XENPMU_* (PMU operation)
14 * @args == struct xenpmu_params
15 */
16/* ` enum xenpmu_op { */
17#define XENPMU_mode_get        0 /* Also used for getting PMU version */
18#define XENPMU_mode_set        1
19#define XENPMU_feature_get     2
20#define XENPMU_feature_set     3
21#define XENPMU_init            4
22#define XENPMU_finish          5
23#define XENPMU_lvtpc_set       6
24#define XENPMU_flush           7
25
26/* ` } */
27
28/* Parameters structure for HYPERVISOR_xenpmu_op call */
29struct xen_pmu_params {
30	/* IN/OUT parameters */
31	struct {
32		uint32_t maj;
33		uint32_t min;
34	} version;
35	uint64_t val;
36
37	/* IN parameters */
38	uint32_t vcpu;
39	uint32_t pad;
40};
41
42/* PMU modes:
43 * - XENPMU_MODE_OFF:   No PMU virtualization
44 * - XENPMU_MODE_SELF:  Guests can profile themselves
45 * - XENPMU_MODE_HV:    Guests can profile themselves, dom0 profiles
46 *                      itself and Xen
47 * - XENPMU_MODE_ALL:   Only dom0 has access to VPMU and it profiles
48 *                      everyone: itself, the hypervisor and the guests.
49 */
50#define XENPMU_MODE_OFF           0
51#define XENPMU_MODE_SELF          (1<<0)
52#define XENPMU_MODE_HV            (1<<1)
53#define XENPMU_MODE_ALL           (1<<2)
54
55/*
56 * PMU features:
57 * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
58 */
59#define XENPMU_FEATURE_INTEL_BTS  1
60
61/*
62 * Shared PMU data between hypervisor and PV(H) domains.
63 *
64 * The hypervisor fills out this structure during PMU interrupt and sends an
65 * interrupt to appropriate VCPU.
66 * Architecture-independent fields of xen_pmu_data are WO for the hypervisor
67 * and RO for the guest but some fields in xen_pmu_arch can be writable
68 * by both the hypervisor and the guest (see arch-$arch/pmu.h).
69 */
70struct xen_pmu_data {
71	/* Interrupted VCPU */
72	uint32_t vcpu_id;
73
74	/*
75	 * Physical processor on which the interrupt occurred. On non-privileged
76	 * guests set to vcpu_id;
77	 */
78	uint32_t pcpu_id;
79
80	/*
81	 * Domain that was interrupted. On non-privileged guests set to
82	 * DOMID_SELF.
83	 * On privileged guests can be DOMID_SELF, DOMID_XEN, or, when in
84	 * XENPMU_MODE_ALL mode, domain ID of another domain.
85	 */
86	domid_t  domain_id;
87
88	uint8_t pad[6];
89
90	/* Architecture-specific information */
91	struct xen_pmu_arch pmu;
92};
93
94#endif /* __XEN_PUBLIC_XENPMU_H__ */
95