linux/arch/mips/mm
Lars Persson 2a4a8b1e5d MIPS: Remove race window in page fault handling
Multicore MIPSes without I/D hardware coherency suffered from a race
condition in the page fault handler. The page table entry was
published before any pending lazy D-cache flush was committed, hence
it allowed execution of stale page cache data by other VPEs in the
system.

To make the cache handling safe we need to perform flushing already in
the set_pte_at function. MIPSes without coherent I-caches can get a
small increase in flushes due to the unavailability of the execute
flag in set_pte_at.

[ralf@linux-mips.org: outlining set_pte_at() saves a good k in a test
build, so I moved its definition from pgtable.h to cache.c.]

Signed-off-by: Lars Persson <larper@axis.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7511/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-19 13:31:09 +02:00
..
Makefile MIPS: Move generated code to .text for microMIPS 2013-07-01 15:10:56 +02:00
c-octeon.c MIPS: Call find_vma with the mmap_sem held 2014-06-03 22:19:09 +02:00
c-r3k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
c-r4k.c MIPS: c-r4k: Avoid duplicate CPU_74K/CPU_1074K checks 2014-07-30 15:50:52 +02:00
c-tx39.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cache.c MIPS: Remove race window in page fault handling 2014-08-19 13:31:09 +02:00
cerr-sb1.c MIPS: Sibyte: Fix build for SIBYTE_BW_TRACE on BCM1x55 and BCM1x80. 2013-06-21 18:07:02 +02:00
cex-gen.S MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cex-oct.S MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cex-sb1.S mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
dma-default.c MIPS: improve checks for noncoherent DMA 2014-01-22 20:43:10 +01:00
extable.c MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
fault.c arch: mm: pass userspace fault flag to generic fault handler 2013-09-12 15:38:01 -07:00
gup.c MIPS: Fix get_user_page_fast() for mips with cache alias 2013-08-26 15:26:48 +02:00
highmem.c MIPS: Highmem: Fix build error if CONFIG_DEBUG_HIGHMEM is disabled 2012-12-13 18:15:27 +01:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
init.c MIPS: Initialise MAARs 2014-08-02 00:06:46 +02:00
ioremap.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
mmap.c mm: remove free_area_cache 2013-07-10 18:11:34 -07:00
page-funcs.S MIPS: Refactor 'clear_page' and 'copy_page' functions. 2012-07-19 11:23:43 +02:00
page.c MIPS: R46000: Fix Micro-assembler field overflow for R4600 V2 2014-05-28 11:08:14 +02:00
pgtable-32.c MIPS: Limit fixrange_init() to the FIXMAP region 2011-07-25 17:26:54 +01:00
pgtable-64.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sc-ip22.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
sc-mips.c MIPS: Add cases for CPU_P5600 2014-03-26 23:09:11 +01:00
sc-r5k.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
sc-rm7k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
tlb-funcs.S MIPS: mm: Fix broken microMIPS kernel regression. 2014-05-14 18:11:06 +02:00
tlb-r3k.c MIPS: Remove incorrect NULL check in local_flush_tlb_page() 2014-07-30 20:59:43 +02:00
tlb-r4k.c MIPS: mm: Use the Hardware Page Table Walker if the core supports it 2014-08-02 00:06:39 +02:00
tlb-r8k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
tlbex-fault.S MIPS: Don't include <asm/page.h> unnecessarily. 2012-12-28 17:04:04 +01:00
tlbex.c Merge branch '3.16-fixes' into mips-for-linux-next 2014-08-02 00:07:03 +02:00
uasm-micromips.c MIPS: uasm: Add SLT uasm instruction 2014-06-26 10:48:19 +01:00
uasm-mips.c MIPS: mm: uasm: Fix lh micro-assembler instruction 2014-06-26 10:48:19 +01:00
uasm.c MIPS: uasm: Add SLT uasm instruction 2014-06-26 10:48:19 +01:00