Mark Rutland bff705950e arm64: remove unnecessary cache flush at boot ... Currently we flush the entire dcache at boot within __cpu_setup, but this is unnecessary as the booting protocol demands that the dcache is invalid and off upon entering the kernel. The presence of the cache flush only serves to hide bugs in bootloaders, and is not safe in the presence of SMP. In an SMP boot scenario the CPUs enter coherency outside of the kernel, and the primary CPU enables its caches before bringing up secondary CPUs. Therefore if any secondary CPU has an entry in its cache (in violation of the boot protocol), the primary CPU might snoop it even if the secondary CPU's cache is disabled. The boot-time cache flush only serves to hide a firmware bug, and slows down a cpu boot unnecessarily. This patch removes the unnecessary boot-time cache flush. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> [catalin.marinas@arm.com: make __flush_dcache_all local only] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2014-03-04 01:07:22 +00:00
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cache.S	arm64: remove unnecessary cache flush at boot	2014-03-04 01:07:22 +00:00
context.c	arm64: Process management	2012-09-17 13:41:58 +01:00
copypage.c	arm64: MMU fault handling and page table management	2012-09-17 13:41:57 +01:00
dma-mapping.c	arm64: Implement coherent DMA API based on swiotlb	2014-02-27 17:16:59 +00:00
extable.c	arm64: MMU fault handling and page table management	2012-09-17 13:41:57 +01:00
fault.c	arm64: Make do_bad_area() function static	2013-09-20 09:56:05 +01:00
flush.c	arm64: Remove __flush_dcache_page()	2013-06-07 17:58:30 +01:00
hugetlbpage.c	mm: migrate: check movability of hugepage in unmap_and_move_huge_page()	2013-09-11 15:57:49 -07:00
init.c	arm64: Use swiotlb late initialisation	2014-02-27 14:11:53 +00:00
ioremap.c	arm64: allow ioremap_cache() to use existing RAM mappings	2013-10-30 12:10:37 +00:00
Makefile	ARM64: mm: HugeTLB support.	2013-06-14 09:52:40 +01:00
mm.h	arm64: Remove __flush_dcache_page()	2013-06-07 17:58:30 +01:00
mmap.c	mm: remove free_area_cache	2013-07-10 18:11:34 -07:00
mmu.c	arm64: Invalidate the TLB when replacing pmd entries during boot	2014-02-05 10:30:51 +00:00
pgd.c	arm64: simplify pgd_alloc	2014-02-05 10:45:07 +00:00
proc-macros.S	arm64: mm: use ubfm for dcache_line_size	2014-01-22 16:23:58 +00:00
proc.S	arm64: remove unnecessary cache flush at boot	2014-03-04 01:07:22 +00:00
tlb.S	arm64: use correct register width when retrieving ASID	2013-09-25 16:42:23 +01:00