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xen: make grant table arch portable

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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>
This commit is contained in:
Isaku Yamahata 2008-04-02 10:54:00 -07:00 • committed by Ingo Molnar
parent 5f0ababbf4
commit 8d3d2106c1
4 changed files with 101 additions and 33 deletions
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6
include/xen/grant_table.h
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@ -103,6 +103,12 @@ 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);
int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
unsigned long max_nr_gframes,
struct grant_entry **__shared);
void arch_gnttab_unmap_shared(struct grant_entry *shared,
unsigned long nr_gframes);
#define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr))
#endif /* __ASM_GNTTAB_H__ */