/usr/include/xen/tmem.h is in libxen-dev 4.9.2-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* tmem.h
*
* Guest OS interface to Xen Transcendent Memory.
*
* 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.
*
* Copyright (c) 2004, K A Fraser
*/
#ifndef __XEN_PUBLIC_TMEM_H__
#define __XEN_PUBLIC_TMEM_H__
#include "xen.h"
/* version of ABI */
#define TMEM_SPEC_VERSION 1
/* Commands to HYPERVISOR_tmem_op() */
#ifdef __XEN__
#define TMEM_CONTROL 0 /* Now called XEN_SYSCTL_tmem_op */
#else
#undef TMEM_CONTROL
#endif
#define TMEM_NEW_POOL 1
#define TMEM_DESTROY_POOL 2
#define TMEM_PUT_PAGE 4
#define TMEM_GET_PAGE 5
#define TMEM_FLUSH_PAGE 6
#define TMEM_FLUSH_OBJECT 7
#if __XEN_INTERFACE_VERSION__ < 0x00040400
#define TMEM_NEW_PAGE 3
#define TMEM_READ 8
#define TMEM_WRITE 9
#define TMEM_XCHG 10
#endif
/* Privileged commands now called via XEN_SYSCTL_tmem_op. */
#define TMEM_AUTH 101 /* as XEN_SYSCTL_TMEM_OP_SET_AUTH. */
#define TMEM_RESTORE_NEW 102 /* as XEN_SYSCTL_TMEM_OP_SET_POOL. */
/* Bits for HYPERVISOR_tmem_op(TMEM_NEW_POOL) */
#define TMEM_POOL_PERSIST 1
#define TMEM_POOL_SHARED 2
#define TMEM_POOL_PRECOMPRESSED 4
#define TMEM_POOL_PAGESIZE_SHIFT 4
#define TMEM_POOL_PAGESIZE_MASK 0xf
#define TMEM_POOL_VERSION_SHIFT 24
#define TMEM_POOL_VERSION_MASK 0xff
#define TMEM_POOL_RESERVED_BITS 0x00ffff00
/* Bits for client flags (save/restore) */
#define TMEM_CLIENT_COMPRESS 1
#define TMEM_CLIENT_FROZEN 2
/* Special errno values */
#define EFROZEN 1000
#define EEMPTY 1001
struct xen_tmem_oid {
uint64_t oid[3];
};
typedef struct xen_tmem_oid xen_tmem_oid_t;
DEFINE_XEN_GUEST_HANDLE(xen_tmem_oid_t);
#ifndef __ASSEMBLY__
#if __XEN_INTERFACE_VERSION__ < 0x00040400
typedef xen_pfn_t tmem_cli_mfn_t;
#endif
typedef XEN_GUEST_HANDLE(char) tmem_cli_va_t;
struct tmem_op {
uint32_t cmd;
int32_t pool_id;
union {
struct {
uint64_t uuid[2];
uint32_t flags;
uint32_t arg1;
} creat; /* for cmd == TMEM_NEW_POOL. */
struct {
#if __XEN_INTERFACE_VERSION__ < 0x00040600
uint64_t oid[3];
#else
xen_tmem_oid_t oid;
#endif
uint32_t index;
uint32_t tmem_offset;
uint32_t pfn_offset;
uint32_t len;
xen_pfn_t cmfn; /* client machine page frame */
} gen; /* for all other cmd ("generic") */
} u;
};
typedef struct tmem_op tmem_op_t;
DEFINE_XEN_GUEST_HANDLE(tmem_op_t);
#endif
#endif /* __XEN_PUBLIC_TMEM_H__ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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