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 */
  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__ */