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Commit f0774532 authored by Ian Campbell's avatar Ian Campbell Committed by Konrad Rzeszutek Wilk
Browse files

xen: define gnttab_set_map_op/unmap_op 



Impact: hypercall definitions

These functions populate the gnttab data structures used by the
granttab map and unmap ops and are used in the backend drivers.

Originally xen-unstable.hg 9625:c3bb51c443a7

[ Include Stefano's fix for phys_addr_t ]

Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 3c0eee3f

include/xen/grant_table.h

+38 −1
Original line number Diff line number Diff line
@@ -37,10 +37,16 @@ 
#ifndef __ASM_GNTTAB_H__

#define __ASM_GNTTAB_H__



#include <asm/xen/hypervisor.h>

#include <asm/page.h>



#include <xen/interface/xen.h>

#include <xen/interface/grant_table.h>



#include <asm/xen/hypervisor.h>

#include <asm/xen/grant_table.h>



#include <xen/features.h>



/* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */

#define NR_GRANT_FRAMES 4
@@ -107,6 +113,37 @@ void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid, 
void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid,

				       unsigned long pfn);



static inline void

gnttab_set_map_op(struct gnttab_map_grant_ref *map, phys_addr_t addr,

		  uint32_t flags, grant_ref_t ref, domid_t domid)

{

	if (flags & GNTMAP_contains_pte)

		map->host_addr = addr;

	else if (xen_feature(XENFEAT_auto_translated_physmap))

		map->host_addr = __pa(addr);

	else

		map->host_addr = addr;



	map->flags = flags;

	map->ref = ref;

	map->dom = domid;

}



static inline void

gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr,

		    uint32_t flags, grant_handle_t handle)

{

	if (flags & GNTMAP_contains_pte)

		unmap->host_addr = addr;

	else if (xen_feature(XENFEAT_auto_translated_physmap))

		unmap->host_addr = __pa(addr);

	else

		unmap->host_addr = addr;



	unmap->handle = handle;

	unmap->dev_bus_addr = 0;

}



int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,

			   unsigned long max_nr_gframes,

			   struct grant_entry **__shared);