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2e45474ab1
linux-stable/mm
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Mike Rapoport (Microsoft) 2e45474ab1 execmem: add support for cache of large ROX pages 
Using large pages to map text areas reduces iTLB pressure and improves
performance.

Extend execmem_alloc() with an ability to use huge pages with ROX
permissions as a cache for smaller allocations.

To populate the cache, a writable large page is allocated from vmalloc
with VM_ALLOW_HUGE_VMAP, filled with invalid instructions and then
remapped as ROX.

The direct map alias of that large page is exculded from the direct map.

Portions of that large page are handed out to execmem_alloc() callers
without any changes to the permissions.

When the memory is freed with execmem_free() it is invalidated again so
that it won't contain stale instructions.

An architecture has to implement execmem_fill_trapping_insns() callback
and select ARCH_HAS_EXECMEM_ROX configuration option to be able to use the
ROX cache.

The cache is enabled on per-range basis when an architecture sets
EXECMEM_ROX_CACHE flag in definition of an execmem_range.

Link: https://lkml.kernel.org/r/20241023162711.2579610-8-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Tested-by: kdevops <kdevops@lists.linux.dev>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Song Liu <song@kernel.org>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-11-07 14:25:16 -08:00
..
damon mm/damon/vaddr: add 'nr_piece == 1' check in damon_va_evenly_split_region() 2024-11-06 20:11:18 -08:00
kasan mm, kasan, kmsan: instrument copy_from/to_kernel_nofault 2024-11-06 20:11:14 -08:00
kfence mm: kfence: fix elapsed time for allocated/freed track 2024-09-26 14:01:44 -07:00
kmsan mm, kasan, kmsan: instrument copy_from/to_kernel_nofault 2024-11-06 20:11:14 -08:00
backing-dev.c writeback: support retrieving per group debug writeback stats of bdi 2024-05-05 17:53:51 -07:00
balloon_compaction.c mm: remove MIGRATE_SYNC_NO_COPY mode 2024-07-03 19:30:00 -07:00
bootmem_info.c bootmem: use kmemleak_free_part_phys in put_page_bootmem 2023-10-25 16:47:13 -07:00
cma_debug.c mm/cma_debug: show complete cma name in debugfs directories 2022-09-11 20:25:50 -07:00
cma_sysfs.c mm/cma: add sysfs file 'release_pages_success' 2024-02-22 10:24:57 -08:00
cma.c mm/cma: fix useless return in void function 2024-11-05 16:56:30 -08:00
cma.h mm/cma: add sysfs file 'release_pages_success' 2024-02-22 10:24:57 -08:00
compaction.c mm:page_alloc: fix the NULL ac->nodemask in __alloc_pages_slowpath() 2024-09-03 21:15:47 -07:00
debug_page_alloc.c mm: page_alloc: consolidate free page accounting 2024-04-25 20:56:04 -07:00
debug_page_ref.c
debug_vm_pgtable.c mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries 2024-09-17 01:07:01 -07:00
debug.c mm: support only one page_type per page 2024-09-03 21:15:43 -07:00
dmapool_test.c mm/dmapool: add MODULE_DESCRIPTION() 2024-07-03 19:29:58 -07:00
dmapool.c mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs 2023-12-05 11:17:58 +01:00
early_ioremap.c mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup() 2023-06-09 16:25:56 -07:00
execmem.c execmem: add support for cache of large ROX pages 2024-11-07 14:25:16 -08:00
fadvise.c introduce fd_file(), convert all accessors to it. 2024-08-12 22:00:43 -04:00
fail_page_alloc.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
failslab.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
filemap.c memcg-v1: remove memcg move locking code 2024-11-06 20:11:19 -08:00
folio-compat.c mm: remove putback_lru_page() 2024-09-09 16:38:59 -07:00
gup_test.c Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes. 2023-06-23 16:58:19 -07:00
gup_test.h mm/gup_test: start/stop/read functionality for PIN LONGTERM test 2022-11-08 17:37:15 -08:00
gup.c gup: convert FOLL_TOUCH case in follow_page_pte() to folio 2024-11-06 20:11:08 -08:00
highmem.c mm/highmem: make nr_free_highpages() return "unsigned long" 2024-07-03 19:30:06 -07:00
hmm.c mm: provide mm_struct and address to huge_ptep_get() 2024-07-12 15:52:15 -07:00
huge_memory.c mm: huge_memory: move file_thp_enabled() into huge_memory.c 2024-11-06 20:11:15 -08:00
hugetlb_cgroup.c mm: memcg: don't call propagate_protected_usage() needlessly 2024-09-01 20:25:50 -07:00
hugetlb_vmemmap.c mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO 2024-09-01 20:25:45 -07:00
hugetlb_vmemmap.h mm: hugetlb_vmemmap: fix reference to nonexistent file 2023-10-25 16:47:14 -07:00
hugetlb.c mm/hugetlb: perform vmemmap optimization batchly for specific node allocation 2024-11-06 20:11:12 -08:00
hwpoison-inject.c mm/hwpoison: add MODULE_DESCRIPTION() 2024-07-03 19:29:58 -07:00
init-mm.c mm: Deprecate pasid field 2023-12-12 10:11:32 +01:00
internal.h execmem: add support for cache of large ROX pages 2024-11-07 14:25:16 -08:00
interval_tree.c
io-mapping.c
ioremap.c mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed 2023-08-18 10:12:36 -07:00
Kconfig resource: remove dependency on SPARSEMEM from GET_FREE_REGION 2024-10-28 21:40:39 -07:00
Kconfig.debug slub: Introduce CONFIG_SLUB_RCU_DEBUG 2024-08-27 14:12:51 +02:00
khugepaged.c mm: khugepaged: collapse_pte_mapped_thp() use pte_offset_map_rw_nolock() 2024-11-05 16:56:27 -08:00
kmemleak.c mm/kmemleak: fix typo in object_no_scan() comment 2024-11-06 20:11:12 -08:00
ksm.c mm: remove unused hugepage for vma_alloc_folio() 2024-11-06 20:11:12 -08:00
list_lru.c mm: list_lru: fix UAF for memory cgroup 2024-08-07 18:33:56 -07:00
maccess.c mm, kasan, kmsan: instrument copy_from/to_kernel_nofault 2024-11-06 20:11:14 -08:00
madvise.c mm/madvise: unrestrict process_madvise() for current process 2024-11-05 16:56:25 -08:00
Makefile mm: introduce numa_emulation 2024-09-03 21:15:31 -07:00
mapping_dirty_helpers.c mm: fix clean_record_shared_mapping_range kernel-doc 2023-08-24 16:20:30 -07:00
memblock.c memblock: updates for 6.12-rc1 2024-09-25 11:35:19 -07:00
memcontrol-v1.c memcg-v1: remove memcg move locking code 2024-11-06 20:11:19 -08:00
memcontrol-v1.h memcg-v1: remove charge move code 2024-11-06 20:11:18 -08:00
memcontrol.c memcg-v1: remove memcg move locking code 2024-11-06 20:11:19 -08:00
memfd.c mm/hugetlb: simplify refs in memfd_alloc_folio 2024-09-26 14:01:44 -07:00
memory_hotplug.c kaslr: rename physmem_end and PHYSMEM_END to direct_map_physmem_end 2024-11-06 20:11:11 -08:00
memory-failure.c mm: migrate: add isolate_folio_to_list() 2024-09-03 21:15:59 -07:00
memory-tiers.c memory tiers: use default_dram_perf_ref_source in log message 2024-09-26 14:01:44 -07:00
memory.c mm/memory.c: simplify pfnmap_lockdep_assert 2024-11-06 20:11:17 -08:00
mempolicy.c mm: remove unused hugepage for vma_alloc_folio() 2024-11-06 20:11:12 -08:00
mempool.c mm: fix xyz_noprof functions calling profiled functions 2024-06-05 19:19:26 -07:00
memremap.c mm: convert put_devmap_managed_page_refs() to put_devmap_managed_folio_refs() 2024-05-05 17:53:49 -07:00
memtest.c memtest: use {READ,WRITE}_ONCE in memory scanning 2024-03-13 12:12:21 -07:00
migrate_device.c mm: remap unused subpages to shared zeropage when splitting isolated thp 2024-09-09 16:39:03 -07:00
migrate.c mm: remove redundant condition for THP folio 2024-11-06 20:11:16 -08:00
mincore.c mm: provide mm_struct and address to huge_ptep_get() 2024-07-12 15:52:15 -07:00
mlock.c Random number generator updates for Linux 6.11-rc1. 2024-07-24 10:29:50 -07:00
mm_init.c mm: drop CONFIG_HAVE_ARCH_NODEDATA_EXTENSION 2024-09-03 21:15:28 -07:00
mm_slot.h mm: introduce common struct mm_slot 2022-10-03 14:02:43 -07:00
mmap_lock.c mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer 2024-07-03 19:30:26 -07:00
mmap.c mm: isolate mmap internal logic to mm/vma.c 2024-11-06 20:11:19 -08:00
mmu_gather.c mm/mmu_gather: improve cond_resched() handling with large folios and expensive page freeing 2024-02-22 15:27:17 -08:00
mmu_notifier.c mm: move internal core VMA manipulation functions to own file 2024-09-01 20:25:54 -07:00
mmzone.c mm: improve code consistency with zonelist_* helper functions 2024-09-01 20:25:55 -07:00
mprotect.c mm: refactor map_deny_write_exec() 2024-11-05 16:49:55 -08:00
mremap.c mm/mremap: remove goto from mremap_to() 2024-11-06 20:11:16 -08:00
mseal.c ALong with the usual shower of singleton patches, notable patch series in 2024-09-21 07:29:05 -07:00
msync.c mm/msync: use vma_find() instead of vma linked list 2022-09-26 19:46:25 -07:00
nommu.c mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling 2024-11-05 16:49:55 -08:00
numa_emulation.c mm: introduce numa_emulation 2024-09-03 21:15:31 -07:00
numa_memblks.c mm: numa_clear_kernel_node_hotplug: Add NUMA_NO_NODE check for node id 2024-10-28 21:40:40 -07:00
numa.c mm: make range-to-target_node lookup facility a part of numa_memblks 2024-09-03 21:15:32 -07:00
oom_kill.c mm: move mm flags to mm_types.h 2024-11-05 16:56:26 -08:00
page_alloc.c mm/page_alloc: use str_off_on() helper in build_all_zonelists() 2024-11-06 20:11:18 -08:00
page_counter.c mm, memcg: cg2 memory{.swap,}.peak write handlers 2024-09-01 20:25:53 -07:00
page_ext.c mm: don't account memmap per-node 2024-08-15 22:16:14 -07:00
page_idle.c mm: page_idle: convert page idle to use a folio 2023-01-18 17:12:52 -08:00
page_io.c mm: swap: make some count_mthp_stat() call-sites be THP-agnostic. 2024-11-06 20:11:09 -08:00
page_isolation.c mm: remove migration for HugePage in isolate_single_pageblock() 2024-09-03 21:15:40 -07:00
page_owner.c mm/page-owner: use gfp_nested_mask() instead of open coded masking 2024-05-19 14:40:44 -07:00
page_poison.c mm/page_poison: replace kmap_atomic() with kmap_local_page() 2023-12-10 16:51:50 -08:00
page_reporting.c mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
page_reporting.h
page_table_check.c mm/page_table_check: fix crash on ZONE_DEVICE 2024-06-15 10:43:04 -07:00
page_vma_mapped.c mm: page_vma_mapped_walk: map_pte() use pte_offset_map_rw_nolock() 2024-11-05 16:56:28 -08:00
page-writeback.c memcg-v1: no need for memcg locking for writeback tracking 2024-11-06 20:11:19 -08:00
pagewalk.c mm/pagewalk: fix usage of pmd_leaf()/pud_leaf() without present check 2024-10-28 21:40:38 -07:00
percpu-internal.h mm: remove CONFIG_MEMCG_KMEM 2024-07-10 12:14:54 -07:00
percpu-km.c
percpu-stats.c
percpu-vm.c percpu: clean up all mappings when pcpu_map_pages() fails 2024-04-25 20:55:49 -07:00
percpu.c percpu: fix data race with pcpu_nr_empty_pop_pages 2024-11-06 20:11:11 -08:00
pgalloc-track.h
pgtable-generic.c mm: pgtable: remove pte_offset_map_nolock() 2024-11-05 16:56:29 -08:00
process_vm_access.c mm: refactor mm_access() to not return NULL 2024-11-05 16:56:23 -08:00
ptdump.c mm: ptdump: add check_wx_pages debugfs attribute 2024-02-22 10:24:47 -08:00
readahead.c mm: don't set readahead flag on a folio when lookahead_size > nr_to_read 2024-11-06 20:11:15 -08:00
rmap.c memcg-v1: remove memcg move locking code 2024-11-06 20:11:19 -08:00
rodata_test.c mm/rodata_test: use PAGE_ALIGNED() helper 2022-10-03 14:03:05 -07:00
secretmem.c secretmem: disable memfd_secret() if arch cannot set direct map 2024-10-09 12:47:19 -07:00
shmem_quota.c shmem_quota: build the object file conditionally to the config option 2024-09-01 20:25:45 -07:00
shmem.c mm: shmem: fallback to page size splice if large folio has poisoned pages 2024-11-06 20:11:18 -08:00
show_mem.c mm/show_mem.c: report alloc tags in human readable units 2024-09-17 01:07:00 -07:00
shrinker_debug.c mm: shrinker: use min() to improve shrinker_debugfs_scan_write() 2024-09-03 21:15:40 -07:00
shrinker.c mm: shrinker: avoid memleak in alloc_shrinker_info 2024-10-31 20:27:04 -07:00
shuffle.c mm/shuffle: convert module_param_call to module_param_cb 2022-10-03 14:03:07 -07:00
shuffle.h mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
slab_common.c mm: krealloc: Fix MTE false alarm in __do_krealloc 2024-10-29 10:40:53 +01:00
slab.h mm, slab: suppress warnings in test_leak_destroy kunit test 2024-10-02 16:28:46 +02:00
slub.c mm, slab: suppress warnings in test_leak_destroy kunit test 2024-10-02 16:28:46 +02:00
sparse-vmemmap.c LoongArch: Set initial pte entry with PAGE_GLOBAL for kernel space 2024-10-21 22:11:19 +08:00
sparse.c kaslr: rename physmem_end and PHYSMEM_END to direct_map_physmem_end 2024-11-06 20:11:11 -08:00
swap_cgroup.c mm: attempt to batch free swap entries for zap_pte_range() 2024-09-03 21:15:33 -07:00
swap_slots.c mm: swap: update get_swap_pages() to take folio order 2024-04-25 20:56:37 -07:00
swap_state.c mm: swap: use str_true_false() helper function 2024-11-06 20:11:14 -08:00
swap.c mm/thp: fix deferred split unqueue naming and locking 2024-11-05 16:49:54 -08:00
swap.h mm: fix swap_read_folio_zeromap() for large folios with partial zeromap 2024-09-17 01:07:01 -07:00
swapfile.c mm, swap: avoid over reclaim of full clusters 2024-10-30 20:14:11 -07:00
truncate.c mm/truncate: reset xa_has_values flag on each iteration 2024-11-06 20:11:09 -08:00
usercopy.c mm: Fix copy_from_user_nofault(). 2023-04-12 17:36:23 -07:00
userfaultfd.c mm: remove unused hugepage for vma_alloc_folio() 2024-11-06 20:11:12 -08:00
util.c mm: only enforce minimum stack gap size if it's sensible 2024-09-01 20:26:02 -07:00
vma_internal.h mm: isolate mmap internal logic to mm/vma.c 2024-11-06 20:11:19 -08:00
vma.c mm/vma: the pgoff is correct if can_merge_right 2024-11-06 20:11:20 -08:00
vma.h mm: isolate mmap internal logic to mm/vma.c 2024-11-06 20:11:19 -08:00
vmalloc.c execmem: add support for cache of large ROX pages 2024-11-07 14:25:16 -08:00
vmpressure.c eventfd: simplify eventfd_signal() 2023-11-28 14:08:38 +01:00
vmscan.c memcg-v1: no need for memcg locking for MGLRU 2024-11-06 20:11:19 -08:00
vmstat.c mm/vmstat: defer the refresh_zone_stat_thresholds after all CPUs bringup 2024-11-06 20:11:13 -08:00
workingset.c memcg: workingset: remove folio_memcg_rcu usage 2024-11-06 20:11:20 -08:00
z3fold.c mm/z3fold: add __percpu annotation to *unbuddied pointer in struct z3fold_pool 2024-09-01 20:25:56 -07:00
zbud.c mm: zpool: return pool size in pages 2024-04-25 20:55:48 -07:00
zpool.c mm: zpool: return pool size in pages 2024-04-25 20:55:48 -07:00
zsmalloc.c ALong with the usual shower of singleton patches, notable patch series in 2024-09-21 07:29:05 -07:00
zswap.c mm/zswap: avoid touching XArray for unnecessary invalidation 2024-11-06 20:11:13 -08:00