kernel_optimize_test/arch/mips/mm
Huacai Chen 0115f6cbf2 MIPS: Flush wrong invalid FTLB entry for huge page
On VTLB+FTLB platforms (such as Loongson-3A R2), FTLB's pagesize is
usually configured the same as PAGE_SIZE. In such a case, Huge page
entry is not suitable to write in FTLB.

Unfortunately, when a huge page is created, its page table entries
haven't created immediately. Then the TLB refill handler will fetch an
invalid page table entry which has no "HUGE" bit, and this entry may be
written to FTLB. Since it is invalid, TLB load/store handler will then
use tlbwi to write the valid entry at the same place. However, the
valid entry is a huge page entry which isn't suitable for FTLB.

Our solution is to modify build_huge_handler_tail. Flush the invalid
old entry (whether it is in FTLB or VTLB, this is in order to reduce
branches) and use tlbwr to write the valid new entry.

Signed-off-by: Rui Wang <wangr@lemote.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15754/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-03-21 21:58:50 +01:00
..
c-octeon.c MIPS: c-r4k: Split user/kernel flush_icache_range() 2016-10-04 16:13:57 +02:00
c-r3k.c MIPS: c-r4k: Split user/kernel flush_icache_range() 2016-10-04 16:13:57 +02:00
c-r4k.c MIPS: c-r4k: Treat physically indexed dcaches as not aliasing 2017-01-03 16:48:40 +01:00
c-tx39.c MIPS: c-r4k: Split user/kernel flush_icache_range() 2016-10-04 16:13:57 +02:00
cache.c MIPS: mm: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +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 This is a tree wide change and has been kept separate for that reason. 2017-02-25 13:45:43 -08:00
extable.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
fault.c MIPS: mm: Fix output of __do_page_fault 2016-11-25 12:08:10 +01:00
gup.c mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2016-10-18 14:13:37 -07:00
highmem.c MIPS: mm: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +02:00
hugetlbpage.c mm/hugetlb: reduce arch dependent code about huge_pmd_unshare 2015-06-24 17:49:41 -07:00
init.c Merge tag 'mips_kvm_4.11_1' into mips-for-linux-next 2017-02-13 18:57:31 +00:00
ioremap.c sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
Makefile MIPS: Move pgd_alloc() out of header 2017-02-02 15:06:26 +00:00
mmap.c sched/headers: Prepare for new header dependencies before moving more code to <linux/sched/mm.h> 2017-03-02 08:42:30 +01:00
page-funcs.S MIPS: Export {copy, clear}_page functions alongside their definitions 2017-01-03 16:48:39 +01:00
page.c MIPS: Export {copy, clear}_page functions alongside their definitions 2017-01-03 16:48:39 +01:00
pgtable-32.c MIPS: Limit fixrange_init() to the FIXMAP region 2011-07-25 17:26:54 +01:00
pgtable-64.c MIPS: Export pgd/pmd symbols for KVM 2017-02-03 15:18:56 +00:00
pgtable.c MIPS: Move pgd_alloc() out of header 2017-02-02 15:06:26 +00:00
sc-debugfs.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sc-ip22.c MIPS: IP22: Fix build error due to binutils 2.25 uselessnes. 2017-01-03 16:34:33 +01:00
sc-mips.c MIPS: sc-mips: L2 cache is inclusive of L1 dcache for CM3 2017-01-03 16:48:40 +01:00
sc-r5k.c MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sc-rm7k.c MIPS: RM7000: Double locking bug in rm7k_tc_disable() 2016-07-21 10:59:46 +02:00
tlb-funcs.S MIPS: mm: Fix broken microMIPS kernel regression. 2014-05-14 18:11:06 +02:00
tlb-r3k.c MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips 2016-05-13 14:02:20 +02:00
tlb-r4k.c MIPS: Mask out limit field when calculating wired entry count 2016-11-24 16:44:16 +01:00
tlb-r8k.c MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips 2016-05-13 14:02:20 +02:00
tlbex-fault.S MIPS: Don't include <asm/page.h> unnecessarily. 2012-12-28 17:04:04 +01:00
tlbex.c MIPS: Flush wrong invalid FTLB entry for huge page 2017-03-21 21:58:50 +01:00
uasm-micromips.c MIPS: uasm: Add MTHI/MTLO instructions 2016-07-05 16:08:35 +02:00
uasm-mips.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
uasm.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00