1 /* SPDX-License-Identifier: MIT */
2 #ifndef __XEN_PUBLIC_XENPMU_H__
3 #define __XEN_PUBLIC_XENPMU_H__
4
5 #include "xen.h"
6
7 #define XENPMU_VER_MAJ 0
8 #define XENPMU_VER_MIN 1
9
10 /*
11 * ` enum neg_errnoval
12 * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args);
13 *
14 * @cmd == XENPMU_* (PMU operation)
15 * @args == struct xenpmu_params
16 */
17 /* ` enum xenpmu_op { */
18 #define XENPMU_mode_get 0 /* Also used for getting PMU version */
19 #define XENPMU_mode_set 1
20 #define XENPMU_feature_get 2
21 #define XENPMU_feature_set 3
22 #define XENPMU_init 4
23 #define XENPMU_finish 5
24 #define XENPMU_lvtpc_set 6
25 #define XENPMU_flush 7
26
27 /* ` } */
28
29 /* Parameters structure for HYPERVISOR_xenpmu_op call */
30 struct xen_pmu_params {
31 /* IN/OUT parameters */
32 struct {
33 uint32_t maj;
34 uint32_t min;
35 } version;
36 uint64_t val;
37
38 /* IN parameters */
39 uint32_t vcpu;
40 uint32_t pad;
41 };
42
43 /* PMU modes:
44 * - XENPMU_MODE_OFF: No PMU virtualization
45 * - XENPMU_MODE_SELF: Guests can profile themselves
46 * - XENPMU_MODE_HV: Guests can profile themselves, dom0 profiles
47 * itself and Xen
48 * - XENPMU_MODE_ALL: Only dom0 has access to VPMU and it profiles
49 * everyone: itself, the hypervisor and the guests.
50 */
51 #define XENPMU_MODE_OFF 0
52 #define XENPMU_MODE_SELF (1<<0)
53 #define XENPMU_MODE_HV (1<<1)
54 #define XENPMU_MODE_ALL (1<<2)
55
56 /*
57 * PMU features:
58 * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
59 */
60 #define XENPMU_FEATURE_INTEL_BTS 1
61
62 /*
63 * Shared PMU data between hypervisor and PV(H) domains.
64 *
65 * The hypervisor fills out this structure during PMU interrupt and sends an
66 * interrupt to appropriate VCPU.
67 * Architecture-independent fields of xen_pmu_data are WO for the hypervisor
68 * and RO for the guest but some fields in xen_pmu_arch can be writable
69 * by both the hypervisor and the guest (see arch-$arch/pmu.h).
70 */
71 struct xen_pmu_data {
72 /* Interrupted VCPU */
73 uint32_t vcpu_id;
74
75 /*
76 * Physical processor on which the interrupt occurred. On non-privileged
77 * guests set to vcpu_id;
78 */
79 uint32_t pcpu_id;
80
81 /*
82 * Domain that was interrupted. On non-privileged guests set to
83 * DOMID_SELF.
84 * On privileged guests can be DOMID_SELF, DOMID_XEN, or, when in
85 * XENPMU_MODE_ALL mode, domain ID of another domain.
86 */
87 domid_t domain_id;
88
89 uint8_t pad[6];
90
91 /* Architecture-specific information */
92 struct xen_pmu_arch pmu;
93 };
94
95 #endif /* __XEN_PUBLIC_XENPMU_H__ */
96
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