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 */
  29 struct 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  */
  70 struct 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__ */