LXR linux/include/xen/interface/xenpmu.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   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 */
  30struct 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 */
  71struct 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