0fd142464f
There are used to grant access of pages to other Xen domains. This code originaly comes from the Xen Project, and more precisely from MiniOS. Change in V4: - Add license to GrantTable.h Change in V3: - Add a comment about the use of the BAR of the device. Change in V2: - Adding locks - Redo the file header - Add functions comment - Add license Signed-off-by: Steven Smith <sos22@cam.ac.uk> Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16264 6f19259b-4bc3-4df7-8a09-765794883524
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/** @file
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Grant Table function declaration.
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Grant Table are used to grant access to certain page of the current
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VM to an other VM.
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Copyright (C) 2014, Citrix Ltd.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __GNTTAB_H__
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#define __GNTTAB_H__
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#include <IndustryStandard/Xen/grant_table.h>
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/**
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Initialize the Grant Table at the address MmioAddr.
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@param Dev A pointer to XENBUS_DEVICE.
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@param MmioAddr An address where the grant table can be mapped into
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the guest.
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**/
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VOID
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XenGrantTableInit (
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IN XENBUS_DEVICE *Dev,
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IN UINT64 MmioAddr
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);
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/**
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Desinitilize the Grant Table.
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**/
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VOID
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XenGrantTableDeinit (
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IN XENBUS_DEVICE *Dev
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);
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/**
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Grant access to the page Frame to the domain DomainId.
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@param This A pointer to XENBUS_PROTOCOL instance.
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@param DomainId ID of the domain to grant acces to.
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@param Frame Frame Number of the page to grant access to.
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@param ReadOnly Provide read-only or read-write access.
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@param RefPtr Reference number of the grant will be writen to this pointer.
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**/
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EFI_STATUS
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EFIAPI
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XenBusGrantAccess (
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IN XENBUS_PROTOCOL *This,
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IN domid_t DomainId,
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IN UINTN Frame, // MFN
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IN BOOLEAN ReadOnly,
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OUT grant_ref_t *RefPtr
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);
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/**
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End access to grant Ref, previously return by XenBusGrantAccess.
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@param This A pointer to XENBUS_PROTOCOL instance.
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@param Ref Reference numeber of a grant previously returned by
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XenBusGrantAccess.
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**/
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EFI_STATUS
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EFIAPI
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XenBusGrantEndAccess (
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IN XENBUS_PROTOCOL *This,
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IN grant_ref_t Ref
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);
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#endif /* !__GNTTAB_H__ */
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