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5ba3d75645
This new call is trying to update a requested map cache entry according to the changes in the physmap. The call is searching for the entry, unmaps it and maps again at the same place using a new guest address. If the mapping is dummy this call will make it real. This function makes use of a new xenforeignmemory_map2() call with an extended interface that was recently introduced in libxenforeignmemory [1]. [1] https://www.mail-archive.com/xen-devel@lists.xen.org/msg113007.html Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com> Reviewed-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* Copyright (C) 2011 Citrix Ltd.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef XEN_MAPCACHE_H
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#define XEN_MAPCACHE_H
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typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr start_addr,
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ram_addr_t size,
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void *opaque);
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#ifdef CONFIG_XEN
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void xen_map_cache_init(phys_offset_to_gaddr_t f,
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void *opaque);
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uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
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uint8_t lock, bool dma);
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ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
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void xen_invalidate_map_cache_entry(uint8_t *buffer);
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void xen_invalidate_map_cache(void);
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uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
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hwaddr new_phys_addr,
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hwaddr size);
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#else
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static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
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void *opaque)
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{
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}
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static inline uint8_t *xen_map_cache(hwaddr phys_addr,
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hwaddr size,
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uint8_t lock,
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bool dma)
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{
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abort();
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}
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static inline ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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{
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abort();
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}
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static inline void xen_invalidate_map_cache_entry(uint8_t *buffer)
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{
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}
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static inline void xen_invalidate_map_cache(void)
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{
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}
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static inline uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
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hwaddr new_phys_addr,
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hwaddr size)
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{
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abort();
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}
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#endif
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#endif /* XEN_MAPCACHE_H */
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