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/******************************************************************************
* include/asm-x86/grant_table.h
*
* Copyright (c) 2004-2005 K A Fraser
*/
#ifndef __ASM_GRANT_TABLE_H__
#define __ASM_GRANT_TABLE_H__
#include <asm/paging.h>
#include <asm/hvm/grant_table.h>
#include <asm/pv/grant_table.h>
#define INITIAL_NR_GRANT_FRAMES 1U
struct grant_table_arch {
};
static inline int create_grant_host_mapping(uint64_t addr, mfn_t frame,
unsigned int flags,
unsigned int cache_flags)
{
if ( paging_mode_external(current->domain) )
return create_grant_p2m_mapping(addr, frame, flags, cache_flags);
return create_grant_pv_mapping(addr, frame, flags, cache_flags);
}
static inline int replace_grant_host_mapping(uint64_t addr, mfn_t frame,
uint64_t new_addr,
unsigned int flags)
{
if ( paging_mode_external(current->domain) )
return replace_grant_p2m_mapping(addr, frame, new_addr, flags);
return replace_grant_pv_mapping(addr, frame, new_addr, flags);
}
#define gnttab_init_arch(gt) 0
#define gnttab_destroy_arch(gt) do {} while ( 0 )
#define gnttab_set_frame_gfn(gt, st, idx, gfn) do {} while ( 0 )
#define gnttab_get_frame_gfn(gt, st, idx) ({ \
mfn_t mfn_ = (st) ? gnttab_status_mfn(gt, idx) \
: gnttab_shared_mfn(gt, idx); \
unsigned long gpfn_ = get_gpfn_from_mfn(mfn_x(mfn_)); \
VALID_M2P(gpfn_) ? _gfn(gpfn_) : INVALID_GFN; \
})
#define gnttab_shared_mfn(t, i) _mfn(__virt_to_mfn((t)->shared_raw[i]))
#define gnttab_shared_gfn(d, t, i) mfn_to_gfn(d, gnttab_shared_mfn(t, i))
#define gnttab_status_mfn(t, i) _mfn(__virt_to_mfn((t)->status[i]))
#define gnttab_status_gfn(d, t, i) mfn_to_gfn(d, gnttab_status_mfn(t, i))
#define gnttab_mark_dirty(d, f) paging_mark_dirty(d, f)
static inline void gnttab_clear_flags(struct domain *d,
unsigned int mask, uint16_t *addr)
{
/* Access must be confined to the specified 2 bytes. */
asm volatile ("lock andw %1,%0" : "+m" (*addr) : "ir" ((uint16_t)~mask));
}
/* Foreign mappings of HVM-guest pages do not modify the type count. */
#define gnttab_host_mapping_get_page_type(ro, ld, rd) \
(!(ro) && (((ld) == (rd)) || !paging_mode_external(rd)))
/* Done implicitly when page tables are destroyed. */
#define gnttab_release_host_mappings(domain) ( paging_mode_external(domain) )
#define gnttab_need_iommu_mapping(d) \
(!paging_mode_translate(d) && need_iommu_pt_sync(d))
#endif /* __ASM_GRANT_TABLE_H__ */
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