ref: 59ed389a6eb7d405eb44d9644d69993e814dccdf
dir: /sys/src/9/xen/xen-public/tmem.h/
/******************************************************************************
* 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() */
#define TMEM_CONTROL 0
#define TMEM_NEW_POOL 1
#define TMEM_DESTROY_POOL 2
#define TMEM_NEW_PAGE 3
#define TMEM_PUT_PAGE 4
#define TMEM_GET_PAGE 5
#define TMEM_FLUSH_PAGE 6
#define TMEM_FLUSH_OBJECT 7
#define TMEM_READ 8
#define TMEM_WRITE 9
#define TMEM_XCHG 10
/* Privileged commands to HYPERVISOR_tmem_op() */
#define TMEM_AUTH 101
#define TMEM_RESTORE_NEW 102
/* Subops for HYPERVISOR_tmem_op(TMEM_CONTROL) */
#define TMEMC_THAW 0
#define TMEMC_FREEZE 1
#define TMEMC_FLUSH 2
#define TMEMC_DESTROY 3
#define TMEMC_LIST 4
#define TMEMC_SET_WEIGHT 5
#define TMEMC_SET_CAP 6
#define TMEMC_SET_COMPRESS 7
#define TMEMC_QUERY_FREEABLE_MB 8
#define TMEMC_SAVE_BEGIN 10
#define TMEMC_SAVE_GET_VERSION 11
#define TMEMC_SAVE_GET_MAXPOOLS 12
#define TMEMC_SAVE_GET_CLIENT_WEIGHT 13
#define TMEMC_SAVE_GET_CLIENT_CAP 14
#define TMEMC_SAVE_GET_CLIENT_FLAGS 15
#define TMEMC_SAVE_GET_POOL_FLAGS 16
#define TMEMC_SAVE_GET_POOL_NPAGES 17
#define TMEMC_SAVE_GET_POOL_UUID 18
#define TMEMC_SAVE_GET_NEXT_PAGE 19
#define TMEMC_SAVE_GET_NEXT_INV 20
#define TMEMC_SAVE_END 21
#define TMEMC_RESTORE_BEGIN 30
#define TMEMC_RESTORE_PUT_PAGE 32
#define TMEMC_RESTORE_FLUSH_PAGE 33
/* 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
#ifndef __ASSEMBLY__
typedef xen_pfn_t tmem_cli_mfn_t;
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, TMEM_AUTH, TMEM_RESTORE_NEW */
struct {
uint32_t subop;
uint32_t cli_id;
uint32_t arg1;
uint32_t arg2;
uint64_t oid[3];
tmem_cli_va_t buf;
} ctrl; /* for cmd == TMEM_CONTROL */
struct {
uint64_t oid[3];
uint32_t index;
uint32_t tmem_offset;
uint32_t pfn_offset;
uint32_t len;
tmem_cli_mfn_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);
struct tmem_handle {
uint32_t pool_id;
uint32_t index;
uint64_t oid[3];
};
#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:
*/