ref: 7628681f83b663609eace87a50f8fbf68c31f40b
dir: /sys/src/9/xen/xen-public/mem_event.h/
/******************************************************************************
* mem_event.h
*
* Memory event common structures.
*
* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef _XEN_PUBLIC_MEM_EVENT_H
#define _XEN_PUBLIC_MEM_EVENT_H
#include "xen.h"
#include "io/ring.h"
/* Memory event flags */
#define MEM_EVENT_FLAG_VCPU_PAUSED (1 << 0)
#define MEM_EVENT_FLAG_DROP_PAGE (1 << 1)
#define MEM_EVENT_FLAG_EVICT_FAIL (1 << 2)
#define MEM_EVENT_FLAG_FOREIGN (1 << 3)
#define MEM_EVENT_FLAG_DUMMY (1 << 4)
/* Reasons for the memory event request */
#define MEM_EVENT_REASON_UNKNOWN 0 /* typical reason */
#define MEM_EVENT_REASON_VIOLATION 1 /* access violation, GFN is address */
#define MEM_EVENT_REASON_CR0 2 /* CR0 was hit: gfn is CR0 value */
#define MEM_EVENT_REASON_CR3 3 /* CR3 was hit: gfn is CR3 value */
#define MEM_EVENT_REASON_CR4 4 /* CR4 was hit: gfn is CR4 value */
#define MEM_EVENT_REASON_INT3 5 /* int3 was hit: gla/gfn are RIP */
#define MEM_EVENT_REASON_SINGLESTEP 6 /* single step was invoked: gla/gfn are RIP */
#define MEM_EVENT_REASON_MSR 7 /* MSR was hit: gfn is MSR value, gla is MSR address;
does NOT honour HVMPME_onchangeonly */
typedef struct mem_event_st {
uint32_t flags;
uint32_t vcpu_id;
uint64_t gfn;
uint64_t offset;
uint64_t gla; /* if gla_valid */
uint32_t p2mt;
uint16_t access_r:1;
uint16_t access_w:1;
uint16_t access_x:1;
uint16_t gla_valid:1;
uint16_t available:12;
uint16_t reason;
} mem_event_request_t, mem_event_response_t;
DEFINE_RING_TYPES(mem_event, mem_event_request_t, mem_event_response_t);
#endif
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/