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Viewing changes to xen/include/asm-x86/grant_table.h

  • Committer: Bazaar Package Importer
  • Author(s): Bastian Blank
  • Date: 2010-05-06 15:47:38 UTC
  • mto: (1.3.1) (15.1.1 sid) (4.1.1 experimental)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20100506154738-agoz0rlafrh1fnq7
Tags: upstream-4.0.0
Import upstream version 4.0.0

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xen/include/asm-x86/grant_table.h
 
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/******************************************************************************
 
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 * include/asm-x86/grant_table.h
 
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 * 
 
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 * Copyright (c) 2004-2005 K A Fraser
 
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 */
 
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#ifndef __ASM_GRANT_TABLE_H__
 
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#define __ASM_GRANT_TABLE_H__
 
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#define INITIAL_NR_GRANT_FRAMES 4
 
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/*
 
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 * Caller must own caller's BIGLOCK, is responsible for flushing the TLB, and
 
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 * must hold a reference to the page.
 
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 */
 
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int create_grant_host_mapping(uint64_t addr, unsigned long frame,
 
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                              unsigned int flags, unsigned int cache_flags);
 
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int replace_grant_host_mapping(
 
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    uint64_t addr, unsigned long frame, uint64_t new_addr, unsigned int flags);
 
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#define gnttab_create_shared_page(d, t, i)                               \
 
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    do {                                                                 \
 
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        share_xen_page_with_guest(                                       \
 
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            virt_to_page((char *)(t)->shared_raw[i]),                    \
 
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            (d), XENSHARE_writable);                                     \
 
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    } while ( 0 )
 
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#define gnttab_create_status_page(d, t, i)                               \
 
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    do {                                                                 \
 
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        share_xen_page_with_guest(                                       \
 
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           virt_to_page((char *)(t)->status[i]),                         \
 
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            (d), XENSHARE_writable);                                     \
 
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    } while ( 0 )
 
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#define gnttab_shared_mfn(d, t, i)                      \
 
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    ((virt_to_maddr((t)->shared_raw[i]) >> PAGE_SHIFT))
 
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#define gnttab_shared_gmfn(d, t, i)                     \
 
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    (mfn_to_gmfn(d, gnttab_shared_mfn(d, t, i)))
 
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#define gnttab_status_mfn(t, i)                         \
 
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    ((virt_to_maddr((t)->status[i]) >> PAGE_SHIFT))
 
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#define gnttab_status_gmfn(d, t, i)                     \
 
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    (mfn_to_gmfn(d, gnttab_status_mfn(t, i)))
 
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#define gnttab_mark_dirty(d, f) paging_mark_dirty((d), (f))
 
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static inline void gnttab_clear_flag(unsigned long nr, uint16_t *addr)
 
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{
 
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    clear_bit(nr, (unsigned long *)addr);
 
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}
 
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/* Foreign mappings of HHVM-guest pages do not modify the type count. */
 
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#define gnttab_host_mapping_get_page_type(op, ld, rd)   \
 
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    (!((op)->flags & GNTMAP_readonly) &&                \
 
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     (((ld) == (rd)) || !paging_mode_external(rd)))
 
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/* Done implicitly when page tables are destroyed. */
 
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#define gnttab_release_host_mappings(domain) ( paging_mode_external(domain) )
 
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static inline int replace_grant_supported(void)
 
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{
 
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    return 1;
 
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}
 
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#endif /* __ASM_GRANT_TABLE_H__ */