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32 results

ioremap.c

  • Toshi Kani's avatar
    e61ce6ad
    mm: change ioremap to set up huge I/O mappings · e61ce6ad
    Toshi Kani authored
    
    ioremap_pud_range() and ioremap_pmd_range() are changed to create huge I/O
    mappings when their capability is enabled, and a request meets required
    conditions -- both virtual & physical addresses are aligned by their huge
    page size, and a requested range fufills their huge page size.  When
    pud_set_huge() or pmd_set_huge() returns zero, i.e.  no-operation is
    performed, the code simply falls back to the next level.
    
    The changes are only enabled when CONFIG_HAVE_ARCH_HUGE_VMAP is defined on
    the architecture.
    
    Signed-off-by: default avatarToshi Kani <toshi.kani@hp.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Dave Hansen <dave.hansen@intel.com>
    Cc: Robert Elliott <Elliott@hp.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    e61ce6ad
    History
    mm: change ioremap to set up huge I/O mappings
    Toshi Kani authored
    
    ioremap_pud_range() and ioremap_pmd_range() are changed to create huge I/O
    mappings when their capability is enabled, and a request meets required
    conditions -- both virtual & physical addresses are aligned by their huge
    page size, and a requested range fufills their huge page size.  When
    pud_set_huge() or pmd_set_huge() returns zero, i.e.  no-operation is
    performed, the code simply falls back to the next level.
    
    The changes are only enabled when CONFIG_HAVE_ARCH_HUGE_VMAP is defined on
    the architecture.
    
    Signed-off-by: default avatarToshi Kani <toshi.kani@hp.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Dave Hansen <dave.hansen@intel.com>
    Cc: Robert Elliott <Elliott@hp.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>