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| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2008-04-02 19:54:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:32 +0200 |
| commit | 8d3d2106c19f4e69f208f59fe484ca113fbb48b3 (patch) | |
| tree | 060b83ab832af7a5ca4bb672673dd9262f0ba3bc /drivers/xen/grant-table.c | |
| parent | xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed one (diff) | |
| download | linux-8d3d2106c19f4e69f208f59fe484ca113fbb48b3.tar.xz linux-8d3d2106c19f4e69f208f59fe484ca113fbb48b3.zip | |
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/grant-table.c')
| -rw-r--r-- | drivers/xen/grant-table.c | 35 |
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; } |