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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-04-02 21:54:00 +0400
committerIngo Molnar <mingo@elte.hu>2008-04-25 01:57:32 +0400
commit8d3d2106c19f4e69f208f59fe484ca113fbb48b3 (patch)
tree060b83ab832af7a5ca4bb672673dd9262f0ba3bc /drivers/xen
parent5f0ababbf49f12330effab932a18055a50f4c0a1 (diff)
downloadlinux-8d3d2106c19f4e69f208f59fe484ca113fbb48b3.tar.xz
xen: make grant table arch portable
split out x86 specific part from grant-table.c and allow ia64/xen specific initialization. ia64/xen grant table is based on pseudo physical address (guest physical address) unlike x86/xen. On ia64 init_mm doesn't map identity straight mapped area. ia64/xen specific grant table initialization is necessary. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/grant-table.c35
1 files changed, 3 insertions, 32 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 3e02808c4055..52b6b41b909d 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -439,24 +439,6 @@ static inline unsigned int max_nr_grant_frames(void)
return xen_max;
}
-static int map_pte_fn(pte_t *pte, struct page *pmd_page,
- unsigned long addr, void *data)
-{
- unsigned long **frames = (unsigned long **)data;
-
- set_pte_at(&init_mm, addr, pte, mfn_pte((*frames)[0], PAGE_KERNEL));
- (*frames)++;
- return 0;
-}
-
-static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
- unsigned long addr, void *data)
-{
-
- set_pte_at(&init_mm, addr, pte, __pte(0));
- return 0;
-}
-
static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
{
struct gnttab_setup_table setup;
@@ -480,17 +462,9 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
BUG_ON(rc || setup.status);
- if (shared == NULL) {
- struct vm_struct *area;
- area = xen_alloc_vm_area(PAGE_SIZE * max_nr_grant_frames());
- BUG_ON(area == NULL);
- shared = area->addr;
- }
- rc = apply_to_page_range(&init_mm, (unsigned long)shared,
- PAGE_SIZE * nr_gframes,
- map_pte_fn, &frames);
+ rc = arch_gnttab_map_shared(frames, nr_gframes, max_nr_grant_frames(),
+ &shared);
BUG_ON(rc);
- frames -= nr_gframes; /* adjust after map_pte_fn() */
kfree(frames);
@@ -506,10 +480,7 @@ static int gnttab_resume(void)
static int gnttab_suspend(void)
{
- apply_to_page_range(&init_mm, (unsigned long)shared,
- PAGE_SIZE * nr_grant_frames,
- unmap_pte_fn, NULL);
-
+ arch_gnttab_unmap_shared(shared, nr_grant_frames);
return 0;
}