95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/******************************************************************************
|
|
* arch/ia64/xen/grant-table.c
|
|
*
|
|
* Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
|
|
* VA Linux Systems Japan K.K.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <xen/interface/xen.h>
|
|
#include <xen/interface/memory.h>
|
|
#include <xen/grant_table.h>
|
|
|
|
#include <asm/xen/hypervisor.h>
|
|
|
|
/****************************************************************************
|
|
* grant table hack
|
|
* cmd: GNTTABOP_xxx
|
|
*/
|
|
|
|
int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
|
|
unsigned long max_nr_gframes,
|
|
struct grant_entry **__shared)
|
|
{
|
|
*__shared = __va(frames[0] << PAGE_SHIFT);
|
|
return 0;
|
|
}
|
|
|
|
void arch_gnttab_unmap_shared(struct grant_entry *shared,
|
|
unsigned long nr_gframes)
|
|
{
|
|
/* nothing */
|
|
}
|
|
|
|
static void
|
|
gnttab_map_grant_ref_pre(struct gnttab_map_grant_ref *uop)
|
|
{
|
|
uint32_t flags;
|
|
|
|
flags = uop->flags;
|
|
|
|
if (flags & GNTMAP_host_map) {
|
|
if (flags & GNTMAP_application_map) {
|
|
printk(KERN_DEBUG
|
|
"GNTMAP_application_map is not supported yet: "
|
|
"flags 0x%x\n", flags);
|
|
BUG();
|
|
}
|
|
if (flags & GNTMAP_contains_pte) {
|
|
printk(KERN_DEBUG
|
|
"GNTMAP_contains_pte is not supported yet: "
|
|
"flags 0x%x\n", flags);
|
|
BUG();
|
|
}
|
|
} else if (flags & GNTMAP_device_map) {
|
|
printk("GNTMAP_device_map is not supported yet 0x%x\n", flags);
|
|
BUG(); /* not yet. actually this flag is not used. */
|
|
} else {
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
int
|
|
HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
|
|
{
|
|
if (cmd == GNTTABOP_map_grant_ref) {
|
|
unsigned int i;
|
|
for (i = 0; i < count; i++) {
|
|
gnttab_map_grant_ref_pre(
|
|
(struct gnttab_map_grant_ref *)uop + i);
|
|
}
|
|
}
|
|
return xencomm_hypercall_grant_table_op(cmd, uop, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
|