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#ifndef __ASM_GRANT_TABLE_H__
#define __ASM_GRANT_TABLE_H__
#include <xen/grant_table.h>
#include <xen/kernel.h>
#include <xen/pfn.h>
#include <xen/sched.h>
#include <asm/guest_atomics.h>
#define INITIAL_NR_GRANT_FRAMES 1U
#define GNTTAB_MAX_VERSION 1
static inline void gnttab_clear_flags(struct domain *d,
unsigned int mask, uint16_t *addr)
{
guest_clear_mask16(d, mask, addr);
}
static inline void gnttab_mark_dirty(struct domain *d, mfn_t mfn)
{
#ifndef NDEBUG
printk_once(XENLOG_G_WARNING "gnttab_mark_dirty not implemented yet\n");
#endif
}
static inline bool gnttab_host_mapping_get_page_type(bool ro,
const struct domain *ld,
const struct domain *rd)
{
return false;
}
static inline bool gnttab_release_host_mappings(const struct domain *d)
{
return true;
}
int create_grant_host_mapping(unsigned long gpaddr, mfn_t mfn,
unsigned int flags, unsigned int cache_flags);
int replace_grant_host_mapping(unsigned long gpaddr, mfn_t mfn,
unsigned long new_gpaddr, unsigned int flags);
/*
* The region used by Xen on the memory will never be mapped in DOM0
* memory layout. Therefore it can be used for the grant table.
*
* Only use the text section as it's always present and will contain
* enough space for a large grant table
*/
#define gnttab_dom0_frames() \
min_t(unsigned int, opt_max_grant_frames, PFN_DOWN(_etext - _stext))
#define gnttab_set_frame_gfn(gt, st, idx, gfn, mfn) \
(gfn_eq(gfn, INVALID_GFN) \
? guest_physmap_remove_page((gt)->domain, \
gnttab_get_frame_gfn(gt, st, idx), \
mfn, 0) \
: 0)
#define gnttab_get_frame_gfn(gt, st, idx) ({ \
(st) ? gnttab_status_gfn(NULL, gt, idx) \
: gnttab_shared_gfn(NULL, gt, idx); \
})
#define gnttab_shared_page(t, i) virt_to_page((t)->shared_raw[i])
#define gnttab_status_page(t, i) virt_to_page((t)->status[i])
#define gnttab_shared_gfn(d, t, i) \
page_get_xenheap_gfn(gnttab_shared_page(t, i))
#define gnttab_status_gfn(d, t, i) \
page_get_xenheap_gfn(gnttab_status_page(t, i))
#define gnttab_need_iommu_mapping(d) \
(is_domain_direct_mapped(d) && is_iommu_enabled(d))
#endif /* __ASM_GRANT_TABLE_H__ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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