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linux-sg2042/arch/powerpc/mm
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Nicholas Piggin 18594f9b8c powerpc/64s/radix: Don't prefetch DAR in update_mmu_cache 
The idea behind this prefetch was to kick off a page table walk before
returning from the fault, getting some pipelining advantage.

But this never showed up any noticable performance advantage, and in
fact with KUAP the prefetches are actually blocked and cause some
kind of micro-architectural fault. Removing this improves page fault
microbenchmark performance by about 9%.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Keep the early return in update_mmu_cache()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200504122907.49304-1-npiggin@gmail.com
 		2020-05-28 23:24:34 +10:00
..
book3s32 Merge branch 'fixes' into next 2020-05-26 22:56:03 +10:00
book3s64 powerpc/64s/radix: Don't prefetch DAR in update_mmu_cache 2020-05-28 23:24:34 +10:00
kasan powerpc/32s: Implement dedicated kasan_init_region() 2020-05-26 22:22:23 +10:00
nohash powerpc/8xx: Allow large TLBs with DEBUG_PAGEALLOC 2020-05-26 22:22:23 +10:00
ptdump powerpc/8xx: Add a function to early map kernel via huge pages 2020-05-26 22:22:22 +10:00
Makefile powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
copro_fault.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
dma-noncoherent.c dma-mapping: drop the dev argument to arch_sync_dma_for_* 2019-11-20 20:31:38 +01:00
drmem.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fault.c powerpc: Add a probe_user_read_inst() function 2020-05-19 00:10:37 +10:00
highmem.c powerpc/highmem: Change BUG_ON() to WARN_ON() 2019-04-20 22:02:11 +10:00
hugetlbpage.c powerpc/8xx: Only 8M pages are hugepte pages now 2020-05-26 22:22:21 +10:00
init-common.c powerpc: introduce kernstart_virt_addr to store the kernel base 2019-11-13 19:27:32 +11:00
init_32.c powerpc/32s: Allow mapping with BATs with DEBUG_PAGEALLOC 2020-05-26 22:22:23 +10:00
init_64.c powerpc: Replace _ALIGN_DOWN() by ALIGN_DOWN() 2020-05-11 23:15:15 +10:00
ioremap.c mm/memremap_pages: Introduce memremap_compat_align() 2020-02-20 16:58:55 -08:00
ioremap_32.c powerpc/ioremap: warn on early use of ioremap() 2019-11-19 19:38:38 +11:00
ioremap_64.c powerpc/ioremap: warn on early use of ioremap() 2019-11-19 19:38:38 +11:00
mem.c mm/memory_hotplug: add pgprot_t to mhp_params 2020-04-10 15:36:21 -07:00
mmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mmu_context.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mmu_decl.h powerpc/8xx: Don't set IMMR map anymore at boot 2020-05-26 22:22:21 +10:00
numa.c powerpc/numa: Remove late request for home node associativity 2020-03-04 22:44:31 +11:00
pgtable-frag.c mm: treewide: clarify pgtable_page_{ctor,dtor}() naming 2019-09-26 10:10:44 -07:00
pgtable.c powerpc/8xx: Manage 512k huge pages as standard pages. 2020-05-26 22:22:21 +10:00
pgtable_32.c powerpc/8xx: Add a function to early map kernel via huge pages 2020-05-26 22:22:22 +10:00
pgtable_64.c powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
slice.c powerpc: Replace _ALIGN_UP() by ALIGN() 2020-05-11 23:15:15 +10:00