2007-07-18 01:37:04 +00:00
|
|
|
/******************************************************************************
|
|
|
|
* grant_table.h
|
|
|
|
*
|
|
|
|
* Interface for granting foreign access to page frames, and receiving
|
|
|
|
* page-ownership transfers.
|
|
|
|
*
|
2007-07-18 01:37:06 +00:00
|
|
|
* 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.
|
|
|
|
*
|
2007-07-18 01:37:04 +00:00
|
|
|
* Copyright (c) 2004, K A Fraser
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef __XEN_PUBLIC_GRANT_TABLE_H__
|
|
|
|
#define __XEN_PUBLIC_GRANT_TABLE_H__
|
|
|
|
|
2010-05-17 16:08:21 +00:00
|
|
|
#include <xen/interface/xen.h>
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/***********************************
|
|
|
|
* GRANT TABLE REPRESENTATION
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Some rough guidelines on accessing and updating grant-table entries
|
|
|
|
* in a concurrency-safe manner. For more information, Linux contains a
|
2007-07-18 01:37:06 +00:00
|
|
|
* reference implementation for guest OSes (arch/xen/kernel/grant_table.c).
|
2007-07-18 01:37:04 +00:00
|
|
|
*
|
|
|
|
* NB. WMB is a no-op on current-generation x86 processors. However, a
|
|
|
|
* compiler barrier will still be required.
|
|
|
|
*
|
|
|
|
* Introducing a valid entry into the grant table:
|
|
|
|
* 1. Write ent->domid.
|
|
|
|
* 2. Write ent->frame:
|
|
|
|
* GTF_permit_access: Frame to which access is permitted.
|
|
|
|
* GTF_accept_transfer: Pseudo-phys frame slot being filled by new
|
|
|
|
* frame, or zero if none.
|
|
|
|
* 3. Write memory barrier (WMB).
|
|
|
|
* 4. Write ent->flags, inc. valid type.
|
|
|
|
*
|
|
|
|
* Invalidating an unused GTF_permit_access entry:
|
|
|
|
* 1. flags = ent->flags.
|
|
|
|
* 2. Observe that !(flags & (GTF_reading|GTF_writing)).
|
|
|
|
* 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0).
|
|
|
|
* NB. No need for WMB as reuse of entry is control-dependent on success of
|
|
|
|
* step 3, and all architectures guarantee ordering of ctrl-dep writes.
|
|
|
|
*
|
|
|
|
* Invalidating an in-use GTF_permit_access entry:
|
|
|
|
* This cannot be done directly. Request assistance from the domain controller
|
|
|
|
* which can set a timeout on the use of a grant entry and take necessary
|
|
|
|
* action. (NB. This is not yet implemented!).
|
|
|
|
*
|
|
|
|
* Invalidating an unused GTF_accept_transfer entry:
|
|
|
|
* 1. flags = ent->flags.
|
|
|
|
* 2. Observe that !(flags & GTF_transfer_committed). [*]
|
|
|
|
* 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0).
|
|
|
|
* NB. No need for WMB as reuse of entry is control-dependent on success of
|
|
|
|
* step 3, and all architectures guarantee ordering of ctrl-dep writes.
|
|
|
|
* [*] If GTF_transfer_committed is set then the grant entry is 'committed'.
|
|
|
|
* The guest must /not/ modify the grant entry until the address of the
|
|
|
|
* transferred frame is written. It is safe for the guest to spin waiting
|
|
|
|
* for this to occur (detect by observing GTF_transfer_completed in
|
|
|
|
* ent->flags).
|
|
|
|
*
|
|
|
|
* Invalidating a committed GTF_accept_transfer entry:
|
|
|
|
* 1. Wait for (ent->flags & GTF_transfer_completed).
|
|
|
|
*
|
|
|
|
* Changing a GTF_permit_access from writable to read-only:
|
|
|
|
* Use SMP-safe CMPXCHG to set GTF_readonly, while checking !GTF_writing.
|
|
|
|
*
|
|
|
|
* Changing a GTF_permit_access from read-only to writable:
|
|
|
|
* Use SMP-safe bit-setting instruction.
|
|
|
|
*/
|
|
|
|
|
2011-11-22 01:58:06 +00:00
|
|
|
/*
|
|
|
|
* Reference to a grant entry in a specified domain's grant table.
|
|
|
|
*/
|
|
|
|
typedef uint32_t grant_ref_t;
|
|
|
|
|
2007-07-18 01:37:04 +00:00
|
|
|
/*
|
|
|
|
* A grant table comprises a packed array of grant entries in one or more
|
|
|
|
* page frames shared between Xen and a guest.
|
|
|
|
* [XEN]: This field is written by Xen and read by the sharing guest.
|
|
|
|
* [GST]: This field is written by the guest and read by Xen.
|
|
|
|
*/
|
2011-11-22 01:58:06 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Version 1 of the grant table entry structure is maintained purely
|
|
|
|
* for backwards compatibility. New guests should use version 2.
|
|
|
|
*/
|
|
|
|
struct grant_entry_v1 {
|
2007-07-18 01:37:04 +00:00
|
|
|
/* GTF_xxx: various type and flag information. [XEN,GST] */
|
|
|
|
uint16_t flags;
|
|
|
|
/* The domain being granted foreign privileges. [GST] */
|
|
|
|
domid_t domid;
|
|
|
|
/*
|
|
|
|
* GTF_permit_access: Frame that @domid is allowed to map and access. [GST]
|
|
|
|
* GTF_accept_transfer: Frame whose ownership transferred by @domid. [XEN]
|
|
|
|
*/
|
|
|
|
uint32_t frame;
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Type of grant entry.
|
|
|
|
* GTF_invalid: This grant entry grants no privileges.
|
|
|
|
* GTF_permit_access: Allow @domid to map/access @frame.
|
|
|
|
* GTF_accept_transfer: Allow @domid to transfer ownership of one page frame
|
|
|
|
* to this guest. Xen writes the page number to @frame.
|
2011-11-22 01:58:06 +00:00
|
|
|
* GTF_transitive: Allow @domid to transitively access a subrange of
|
|
|
|
* @trans_grant in @trans_domid. No mappings are allowed.
|
2007-07-18 01:37:04 +00:00
|
|
|
*/
|
|
|
|
#define GTF_invalid (0U<<0)
|
|
|
|
#define GTF_permit_access (1U<<0)
|
|
|
|
#define GTF_accept_transfer (2U<<0)
|
2011-11-22 01:58:06 +00:00
|
|
|
#define GTF_transitive (3U<<0)
|
2007-07-18 01:37:04 +00:00
|
|
|
#define GTF_type_mask (3U<<0)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Subflags for GTF_permit_access.
|
|
|
|
* GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST]
|
|
|
|
* GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN]
|
|
|
|
* GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN]
|
2011-11-22 01:58:06 +00:00
|
|
|
* GTF_sub_page: Grant access to only a subrange of the page. @domid
|
|
|
|
* will only be allowed to copy from the grant, and not
|
|
|
|
* map it. [GST]
|
2007-07-18 01:37:04 +00:00
|
|
|
*/
|
|
|
|
#define _GTF_readonly (2)
|
|
|
|
#define GTF_readonly (1U<<_GTF_readonly)
|
|
|
|
#define _GTF_reading (3)
|
|
|
|
#define GTF_reading (1U<<_GTF_reading)
|
|
|
|
#define _GTF_writing (4)
|
|
|
|
#define GTF_writing (1U<<_GTF_writing)
|
2011-11-22 01:58:06 +00:00
|
|
|
#define _GTF_sub_page (8)
|
|
|
|
#define GTF_sub_page (1U<<_GTF_sub_page)
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Subflags for GTF_accept_transfer:
|
|
|
|
* GTF_transfer_committed: Xen sets this flag to indicate that it is committed
|
|
|
|
* to transferring ownership of a page frame. When a guest sees this flag
|
|
|
|
* it must /not/ modify the grant entry until GTF_transfer_completed is
|
|
|
|
* set by Xen.
|
|
|
|
* GTF_transfer_completed: It is safe for the guest to spin-wait on this flag
|
|
|
|
* after reading GTF_transfer_committed. Xen will always write the frame
|
|
|
|
* address, followed by ORing this flag, in a timely manner.
|
|
|
|
*/
|
|
|
|
#define _GTF_transfer_committed (2)
|
|
|
|
#define GTF_transfer_committed (1U<<_GTF_transfer_committed)
|
|
|
|
#define _GTF_transfer_completed (3)
|
|
|
|
#define GTF_transfer_completed (1U<<_GTF_transfer_completed)
|
|
|
|
|
2011-11-22 01:58:06 +00:00
|
|
|
/*
|
|
|
|
* Version 2 grant table entries. These fulfil the same role as
|
|
|
|
* version 1 entries, but can represent more complicated operations.
|
|
|
|
* Any given domain will have either a version 1 or a version 2 table,
|
|
|
|
* and every entry in the table will be the same version.
|
|
|
|
*
|
|
|
|
* The interface by which domains use grant references does not depend
|
|
|
|
* on the grant table version in use by the other domain.
|
|
|
|
*/
|
2007-07-18 01:37:04 +00:00
|
|
|
|
2011-11-22 01:58:06 +00:00
|
|
|
/*
|
|
|
|
* Version 1 and version 2 grant entries share a common prefix. The
|
|
|
|
* fields of the prefix are documented as part of struct
|
|
|
|
* grant_entry_v1.
|
2007-07-18 01:37:04 +00:00
|
|
|
*/
|
2011-11-22 01:58:06 +00:00
|
|
|
struct grant_entry_header {
|
|
|
|
uint16_t flags;
|
|
|
|
domid_t domid;
|
|
|
|
};
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
2011-11-22 01:58:06 +00:00
|
|
|
* Version 2 of the grant entry structure, here is an union because three
|
|
|
|
* different types are suppotted: full_page, sub_page and transitive.
|
|
|
|
*/
|
|
|
|
union grant_entry_v2 {
|
|
|
|
struct grant_entry_header hdr;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This member is used for V1-style full page grants, where either:
|
|
|
|
*
|
|
|
|
* -- hdr.type is GTF_accept_transfer, or
|
|
|
|
* -- hdr.type is GTF_permit_access and GTF_sub_page is not set.
|
|
|
|
*
|
|
|
|
* In that case, the frame field has the same semantics as the
|
|
|
|
* field of the same name in the V1 entry structure.
|
|
|
|
*/
|
|
|
|
struct {
|
|
|
|
struct grant_entry_header hdr;
|
|
|
|
uint32_t pad0;
|
|
|
|
uint64_t frame;
|
|
|
|
} full_page;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the grant type is GTF_grant_access and GTF_sub_page is set,
|
|
|
|
* @domid is allowed to access bytes [@page_off,@page_off+@length)
|
|
|
|
* in frame @frame.
|
|
|
|
*/
|
|
|
|
struct {
|
|
|
|
struct grant_entry_header hdr;
|
|
|
|
uint16_t page_off;
|
|
|
|
uint16_t length;
|
|
|
|
uint64_t frame;
|
|
|
|
} sub_page;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the grant is GTF_transitive, @domid is allowed to use the
|
|
|
|
* grant @gref in domain @trans_domid, as if it was the local
|
|
|
|
* domain. Obviously, the transitive access must be compatible
|
|
|
|
* with the original grant.
|
|
|
|
*/
|
|
|
|
struct {
|
|
|
|
struct grant_entry_header hdr;
|
|
|
|
domid_t trans_domid;
|
|
|
|
uint16_t pad0;
|
|
|
|
grant_ref_t gref;
|
|
|
|
} transitive;
|
|
|
|
|
|
|
|
uint32_t __spacer[4]; /* Pad to a power of two */
|
|
|
|
};
|
|
|
|
|
|
|
|
typedef uint16_t grant_status_t;
|
|
|
|
|
|
|
|
/***********************************
|
|
|
|
* GRANT TABLE QUERIES AND USES
|
2007-07-18 01:37:04 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Handle to track a mapping created via a grant reference.
|
|
|
|
*/
|
|
|
|
typedef uint32_t grant_handle_t;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_map_grant_ref: Map the grant entry (<dom>,<ref>) for access
|
|
|
|
* by devices and/or host CPUs. If successful, <handle> is a tracking number
|
|
|
|
* that must be presented later to destroy the mapping(s). On error, <handle>
|
|
|
|
* is a negative status code.
|
|
|
|
* NOTES:
|
2007-07-18 01:37:06 +00:00
|
|
|
* 1. If GNTMAP_device_map is specified then <dev_bus_addr> is the address
|
2007-07-18 01:37:04 +00:00
|
|
|
* via which I/O devices may access the granted frame.
|
2007-07-18 01:37:06 +00:00
|
|
|
* 2. If GNTMAP_host_map is specified then a mapping will be added at
|
2007-07-18 01:37:04 +00:00
|
|
|
* either a host virtual address in the current address space, or at
|
|
|
|
* a PTE at the specified machine address. The type of mapping to
|
|
|
|
* perform is selected through the GNTMAP_contains_pte flag, and the
|
|
|
|
* address is specified in <host_addr>.
|
|
|
|
* 3. Mappings should only be destroyed via GNTTABOP_unmap_grant_ref. If a
|
|
|
|
* host mapping is destroyed by other means then it is *NOT* guaranteed
|
|
|
|
* to be accounted to the correct grant reference!
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_map_grant_ref 0
|
|
|
|
struct gnttab_map_grant_ref {
|
|
|
|
/* IN parameters. */
|
|
|
|
uint64_t host_addr;
|
|
|
|
uint32_t flags; /* GNTMAP_* */
|
|
|
|
grant_ref_t ref;
|
|
|
|
domid_t dom;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
grant_handle_t handle;
|
|
|
|
uint64_t dev_bus_addr;
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref);
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_unmap_grant_ref: Destroy one or more grant-reference mappings
|
|
|
|
* tracked by <handle>. If <host_addr> or <dev_bus_addr> is zero, that
|
|
|
|
* field is ignored. If non-zero, they must refer to a device/host mapping
|
|
|
|
* that is tracked by <handle>
|
|
|
|
* NOTES:
|
|
|
|
* 1. The call may fail in an undefined manner if either mapping is not
|
|
|
|
* tracked by <handle>.
|
|
|
|
* 3. After executing a batch of unmaps, it is guaranteed that no stale
|
|
|
|
* mappings will remain in the device or host TLBs.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_unmap_grant_ref 1
|
|
|
|
struct gnttab_unmap_grant_ref {
|
|
|
|
/* IN parameters. */
|
|
|
|
uint64_t host_addr;
|
|
|
|
uint64_t dev_bus_addr;
|
|
|
|
grant_handle_t handle;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref);
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_setup_table: Set up a grant table for <dom> comprising at least
|
|
|
|
* <nr_frames> pages. The frame addresses are written to the <frame_list>.
|
|
|
|
* Only <nr_frames> addresses are written, even if the table is larger.
|
|
|
|
* NOTES:
|
|
|
|
* 1. <dom> may be specified as DOMID_SELF.
|
|
|
|
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
|
|
|
|
* 3. Xen may not support more than a single grant-table page per domain.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_setup_table 2
|
|
|
|
struct gnttab_setup_table {
|
|
|
|
/* IN parameters. */
|
|
|
|
domid_t dom;
|
|
|
|
uint32_t nr_frames;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
2008-04-02 17:53:52 +00:00
|
|
|
GUEST_HANDLE(ulong) frame_list;
|
2007-07-18 01:37:04 +00:00
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table);
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_dump_table: Dump the contents of the grant table to the
|
|
|
|
* xen console. Debugging use only.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_dump_table 3
|
|
|
|
struct gnttab_dump_table {
|
|
|
|
/* IN parameters. */
|
|
|
|
domid_t dom;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table);
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The
|
|
|
|
* foreign domain has previously registered its interest in the transfer via
|
|
|
|
* <domid, ref>.
|
|
|
|
*
|
|
|
|
* Note that, even if the transfer fails, the specified page no longer belongs
|
|
|
|
* to the calling domain *unless* the error is GNTST_bad_page.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_transfer 4
|
|
|
|
struct gnttab_transfer {
|
|
|
|
/* IN parameters. */
|
2012-08-22 16:20:14 +00:00
|
|
|
xen_pfn_t mfn;
|
2007-07-18 01:37:04 +00:00
|
|
|
domid_t domid;
|
|
|
|
grant_ref_t ref;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status;
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_transfer);
|
2007-07-18 01:37:06 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_copy: Hypervisor based copy
|
|
|
|
* source and destinations can be eithers MFNs or, for foreign domains,
|
|
|
|
* grant references. the foreign domain has to grant read/write access
|
|
|
|
* in its grant table.
|
|
|
|
*
|
|
|
|
* The flags specify what type source and destinations are (either MFN
|
|
|
|
* or grant reference).
|
|
|
|
*
|
|
|
|
* Note that this can also be used to copy data between two domains
|
|
|
|
* via a third party if the source and destination domains had previously
|
|
|
|
* grant appropriate access to their pages to the third party.
|
|
|
|
*
|
|
|
|
* source_offset specifies an offset in the source frame, dest_offset
|
|
|
|
* the offset in the target frame and len specifies the number of
|
|
|
|
* bytes to be copied.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define _GNTCOPY_source_gref (0)
|
|
|
|
#define GNTCOPY_source_gref (1<<_GNTCOPY_source_gref)
|
|
|
|
#define _GNTCOPY_dest_gref (1)
|
|
|
|
#define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref)
|
|
|
|
|
|
|
|
#define GNTTABOP_copy 5
|
|
|
|
struct gnttab_copy {
|
|
|
|
/* IN parameters. */
|
|
|
|
struct {
|
|
|
|
union {
|
|
|
|
grant_ref_t ref;
|
2012-08-22 16:20:14 +00:00
|
|
|
xen_pfn_t gmfn;
|
2007-07-18 01:37:06 +00:00
|
|
|
} u;
|
|
|
|
domid_t domid;
|
|
|
|
uint16_t offset;
|
|
|
|
} source, dest;
|
|
|
|
uint16_t len;
|
|
|
|
uint16_t flags; /* GNTCOPY_* */
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status;
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy);
|
2007-07-18 01:37:06 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_query_size: Query the current and maximum sizes of the shared
|
|
|
|
* grant table.
|
|
|
|
* NOTES:
|
|
|
|
* 1. <dom> may be specified as DOMID_SELF.
|
|
|
|
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_query_size 6
|
|
|
|
struct gnttab_query_size {
|
|
|
|
/* IN parameters. */
|
|
|
|
domid_t dom;
|
|
|
|
/* OUT parameters. */
|
|
|
|
uint32_t nr_frames;
|
|
|
|
uint32_t max_nr_frames;
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
};
|
2008-04-02 17:53:52 +00:00
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size);
|
2007-07-18 01:37:04 +00:00
|
|
|
|
2011-11-22 01:58:06 +00:00
|
|
|
/*
|
|
|
|
* GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings
|
|
|
|
* tracked by <handle> but atomically replace the page table entry with one
|
|
|
|
* pointing to the machine address under <new_addr>. <new_addr> will be
|
|
|
|
* redirected to the null entry.
|
|
|
|
* NOTES:
|
|
|
|
* 1. The call may fail in an undefined manner if either mapping is not
|
|
|
|
* tracked by <handle>.
|
|
|
|
* 2. After executing a batch of unmaps, it is guaranteed that no stale
|
|
|
|
* mappings will remain in the device or host TLBs.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_unmap_and_replace 7
|
|
|
|
struct gnttab_unmap_and_replace {
|
|
|
|
/* IN parameters. */
|
|
|
|
uint64_t host_addr;
|
|
|
|
uint64_t new_addr;
|
|
|
|
grant_handle_t handle;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
};
|
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_and_replace);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_set_version: Request a particular version of the grant
|
|
|
|
* table shared table structure. This operation can only be performed
|
|
|
|
* once in any given domain. It must be performed before any grants
|
|
|
|
* are activated; otherwise, the domain will be stuck with version 1.
|
|
|
|
* The only defined versions are 1 and 2.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_set_version 8
|
|
|
|
struct gnttab_set_version {
|
|
|
|
/* IN parameters */
|
|
|
|
uint32_t version;
|
|
|
|
};
|
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_get_status_frames: Get the list of frames used to store grant
|
|
|
|
* status for <dom>. In grant format version 2, the status is separated
|
|
|
|
* from the other shared grant fields to allow more efficient synchronization
|
|
|
|
* using barriers instead of atomic cmpexch operations.
|
|
|
|
* <nr_frames> specify the size of vector <frame_list>.
|
|
|
|
* The frame addresses are returned in the <frame_list>.
|
|
|
|
* Only <nr_frames> addresses are returned, even if the table is larger.
|
|
|
|
* NOTES:
|
|
|
|
* 1. <dom> may be specified as DOMID_SELF.
|
|
|
|
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_get_status_frames 9
|
|
|
|
struct gnttab_get_status_frames {
|
|
|
|
/* IN parameters. */
|
|
|
|
uint32_t nr_frames;
|
|
|
|
domid_t dom;
|
|
|
|
/* OUT parameters. */
|
|
|
|
int16_t status; /* GNTST_* */
|
|
|
|
GUEST_HANDLE(uint64_t) frame_list;
|
|
|
|
};
|
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_status_frames);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTTABOP_get_version: Get the grant table version which is in
|
|
|
|
* effect for domain <dom>.
|
|
|
|
*/
|
|
|
|
#define GNTTABOP_get_version 10
|
|
|
|
struct gnttab_get_version {
|
|
|
|
/* IN parameters */
|
|
|
|
domid_t dom;
|
|
|
|
uint16_t pad;
|
|
|
|
/* OUT parameters */
|
|
|
|
uint32_t version;
|
|
|
|
};
|
|
|
|
DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_version);
|
|
|
|
|
2007-07-18 01:37:04 +00:00
|
|
|
/*
|
|
|
|
* Bitfield values for update_pin_status.flags.
|
|
|
|
*/
|
|
|
|
/* Map the grant entry for access by I/O devices. */
|
|
|
|
#define _GNTMAP_device_map (0)
|
|
|
|
#define GNTMAP_device_map (1<<_GNTMAP_device_map)
|
|
|
|
/* Map the grant entry for access by host CPUs. */
|
|
|
|
#define _GNTMAP_host_map (1)
|
|
|
|
#define GNTMAP_host_map (1<<_GNTMAP_host_map)
|
|
|
|
/* Accesses to the granted frame will be restricted to read-only access. */
|
|
|
|
#define _GNTMAP_readonly (2)
|
|
|
|
#define GNTMAP_readonly (1<<_GNTMAP_readonly)
|
|
|
|
/*
|
|
|
|
* GNTMAP_host_map subflag:
|
|
|
|
* 0 => The host mapping is usable only by the guest OS.
|
|
|
|
* 1 => The host mapping is usable by guest OS + current application.
|
|
|
|
*/
|
|
|
|
#define _GNTMAP_application_map (3)
|
|
|
|
#define GNTMAP_application_map (1<<_GNTMAP_application_map)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* GNTMAP_contains_pte subflag:
|
|
|
|
* 0 => This map request contains a host virtual address.
|
|
|
|
* 1 => This map request contains the machine addess of the PTE to update.
|
|
|
|
*/
|
|
|
|
#define _GNTMAP_contains_pte (4)
|
|
|
|
#define GNTMAP_contains_pte (1<<_GNTMAP_contains_pte)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Values for error status returns. All errors are -ve.
|
|
|
|
*/
|
|
|
|
#define GNTST_okay (0) /* Normal return. */
|
|
|
|
#define GNTST_general_error (-1) /* General undefined error. */
|
|
|
|
#define GNTST_bad_domain (-2) /* Unrecognsed domain id. */
|
|
|
|
#define GNTST_bad_gntref (-3) /* Unrecognised or inappropriate gntref. */
|
|
|
|
#define GNTST_bad_handle (-4) /* Unrecognised or inappropriate handle. */
|
|
|
|
#define GNTST_bad_virt_addr (-5) /* Inappropriate virtual address to map. */
|
|
|
|
#define GNTST_bad_dev_addr (-6) /* Inappropriate device address to unmap.*/
|
|
|
|
#define GNTST_no_device_space (-7) /* Out of space in I/O MMU. */
|
|
|
|
#define GNTST_permission_denied (-8) /* Not enough privilege for operation. */
|
|
|
|
#define GNTST_bad_page (-9) /* Specified page was invalid for op. */
|
2007-07-18 01:37:06 +00:00
|
|
|
#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary */
|
2007-07-18 01:37:04 +00:00
|
|
|
|
|
|
|
#define GNTTABOP_error_msgs { \
|
|
|
|
"okay", \
|
|
|
|
"undefined error", \
|
|
|
|
"unrecognised domain id", \
|
|
|
|
"invalid grant reference", \
|
|
|
|
"invalid mapping handle", \
|
|
|
|
"invalid virtual address", \
|
|
|
|
"invalid device address", \
|
|
|
|
"no spare translation slot in the I/O MMU", \
|
|
|
|
"permission denied", \
|
2007-07-18 01:37:06 +00:00
|
|
|
"bad page", \
|
|
|
|
"copy arguments cross page boundary" \
|
2007-07-18 01:37:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */
|