The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/xen/interface/pmu.h

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    1 /*
    2  * Permission is hereby granted, free of charge, to any person obtaining a copy
    3  * of this software and associated documentation files (the "Software"), to
    4  * deal in the Software without restriction, including without limitation the
    5  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    6  * sell copies of the Software, and to permit persons to whom the Software is
    7  * furnished to do so, subject to the following conditions:
    8  *
    9  * The above copyright notice and this permission notice shall be included in
   10  * all copies or substantial portions of the Software.
   11  *
   12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   14  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   15  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   16  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   17  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   18  * DEALINGS IN THE SOFTWARE.
   19  *
   20  * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
   21  */
   22 
   23 #ifndef __XEN_PUBLIC_PMU_H__
   24 #define __XEN_PUBLIC_PMU_H__
   25 
   26 #include "xen.h"
   27 #if defined(__i386__) || defined(__x86_64__)
   28 #include "arch-x86/pmu.h"
   29 #elif defined (__arm__) || defined (__aarch64__)
   30 #include "arch-arm.h"
   31 #else
   32 #error "Unsupported architecture"
   33 #endif
   34 
   35 #define XENPMU_VER_MAJ    0
   36 #define XENPMU_VER_MIN    1
   37 
   38 /*
   39  * ` enum neg_errnoval
   40  * ` HYPERVISOR_xenpmu_op(enum xenpmu_op cmd, struct xenpmu_params *args);
   41  *
   42  * @cmd  == XENPMU_* (PMU operation)
   43  * @args == struct xenpmu_params
   44  */
   45 /* ` enum xenpmu_op { */
   46 #define XENPMU_mode_get        0 /* Also used for getting PMU version */
   47 #define XENPMU_mode_set        1
   48 #define XENPMU_feature_get     2
   49 #define XENPMU_feature_set     3
   50 #define XENPMU_init            4
   51 #define XENPMU_finish          5
   52 #define XENPMU_lvtpc_set       6
   53 #define XENPMU_flush           7 /* Write cached MSR values to HW     */
   54 /* ` } */
   55 
   56 /* Parameters structure for HYPERVISOR_xenpmu_op call */
   57 struct xen_pmu_params {
   58     /* IN/OUT parameters */
   59     struct {
   60         uint32_t maj;
   61         uint32_t min;
   62     } version;
   63     uint64_t val;
   64 
   65     /* IN parameters */
   66     uint32_t vcpu;
   67     uint32_t pad;
   68 };
   69 typedef struct xen_pmu_params xen_pmu_params_t;
   70 DEFINE_XEN_GUEST_HANDLE(xen_pmu_params_t);
   71 
   72 /* PMU modes:
   73  * - XENPMU_MODE_OFF:   No PMU virtualization
   74  * - XENPMU_MODE_SELF:  Guests can profile themselves
   75  * - XENPMU_MODE_HV:    Guests can profile themselves, dom0 profiles
   76  *                      itself and Xen
   77  * - XENPMU_MODE_ALL:   Only dom0 has access to VPMU and it profiles
   78  *                      everyone: itself, the hypervisor and the guests.
   79  */
   80 #define XENPMU_MODE_OFF           0
   81 #define XENPMU_MODE_SELF          (1<<0)
   82 #define XENPMU_MODE_HV            (1<<1)
   83 #define XENPMU_MODE_ALL           (1<<2)
   84 
   85 /*
   86  * PMU features:
   87  * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
   88  */
   89 #define XENPMU_FEATURE_INTEL_BTS  1
   90 
   91 /*
   92  * Shared PMU data between hypervisor and PV(H) domains.
   93  *
   94  * The hypervisor fills out this structure during PMU interrupt and sends an
   95  * interrupt to appropriate VCPU.
   96  * Architecture-independent fields of xen_pmu_data are WO for the hypervisor
   97  * and RO for the guest but some fields in xen_pmu_arch can be writable
   98  * by both the hypervisor and the guest (see arch-$arch/pmu.h).
   99  */
  100 struct xen_pmu_data {
  101     /* Interrupted VCPU */
  102     uint32_t vcpu_id;
  103 
  104     /*
  105      * Physical processor on which the interrupt occurred. On non-privileged
  106      * guests set to vcpu_id;
  107      */
  108     uint32_t pcpu_id;
  109 
  110     /*
  111      * Domain that was interrupted. On non-privileged guests set to DOMID_SELF.
  112      * On privileged guests can be DOMID_SELF, DOMID_XEN, or, when in
  113      * XENPMU_MODE_ALL mode, domain ID of another domain.
  114      */
  115     domid_t  domain_id;
  116 
  117     uint8_t pad[6];
  118 
  119     /* Architecture-specific information */
  120     struct xen_pmu_arch pmu;
  121 };
  122 
  123 #endif /* __XEN_PUBLIC_PMU_H__ */
  124 
  125 /*
  126  * Local variables:
  127  * mode: C
  128  * c-file-style: "BSD"
  129  * c-basic-offset: 4
  130  * tab-width: 4
  131  * indent-tabs-mode: nil
  132  * End:
  133  */

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