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

   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