diff options
| author | Jan Beulich <jbeulich@novell.com> | 2007-02-05 18:46:40 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-02-05 18:46:40 -0800 |
| commit | cde14bbfb3aa79b479db35bd29e6c083513d8614 (patch) | |
| tree | 68b2d66d1eee3067051f4a6e4df8ace461bf440f /arch | |
| parent | 86afa9eb88af2248bcc91d5b3568c63fdea65d6c (diff) | |
| download | kernel_samsung_smdk4412-cde14bbfb3aa79b479db35bd29e6c083513d8614.zip kernel_samsung_smdk4412-cde14bbfb3aa79b479db35bd29e6c083513d8614.tar.gz kernel_samsung_smdk4412-cde14bbfb3aa79b479db35bd29e6c083513d8614.tar.bz2 | |
[IA64] swiotlb bug fixes
This patch fixes
- marking I-cache clean of pages DMAed to now only done for IA64
- broken multiple inclusion in include/asm-x86_64/swiotlb.h
- missing call to mark_clean in swiotlb_sync_sg()
- a (perhaps only theoretical) issue in swiotlb_dma_supported() when
io_tlb_end is exactly at the end of memory
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/mm/init.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 8b75998..faaca21 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -129,6 +129,25 @@ lazy_mmu_prot_update (pte_t pte) set_bit(PG_arch_1, &page->flags); /* mark page as clean */ } +/* + * Since DMA is i-cache coherent, any (complete) pages that were written via + * DMA can be marked as "clean" so that lazy_mmu_prot_update() doesn't have to + * flush them when they get mapped into an executable vm-area. + */ +void +dma_mark_clean(void *addr, size_t size) +{ + unsigned long pg_addr, end; + + pg_addr = PAGE_ALIGN((unsigned long) addr); + end = (unsigned long) addr + size; + while (pg_addr + PAGE_SIZE <= end) { + struct page *page = virt_to_page(pg_addr); + set_bit(PG_arch_1, &page->flags); + pg_addr += PAGE_SIZE; + } +} + inline void ia64_set_rbs_bot (void) { |