Michael Roth c72ceafbd1 mm: Introduce AS_INACCESSIBLE for encrypted/confidential memory ... filemap users like guest_memfd may use page cache pages to allocate/manage memory that is only intended to be accessed by guests via hardware protections like encryption. Writes to memory of this sort in common paths like truncation may cause unexpected behavior such as writing garbage instead of zeros when attempting to zero pages, or worse, triggering hardware protections that are considered fatal as far as the kernel is concerned. Introduce a new address_space flag, AS_INACCESSIBLE, and use this initially to prevent zero'ing of pages during truncation, with the understanding that it is up to the owner of the mapping to handle this specially if needed. This is admittedly a rather blunt solution, but it seems like there are no other places that should take into account the flag to keep its promise. Link: https://lore.kernel.org/lkml/ZR9LYhpxTaTk6PJX@google.com/ Cc: Matthew Wilcox <willy@infradead.org> Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Michael Roth <michael.roth@amd.com> Message-ID: <20240329212444.395559-5-michael.roth@amd.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2024-05-10 13:11:45 -04:00
..
damon	mm: madvise: pageout: ignore references rather than clearing young	2024-03-04 17:01:18 -08:00
kasan	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
kfence	KFENCE: cleanup kfence_guarded_alloc() after CONFIG_SLAB removal	2023-12-05 11:17:58 +01:00
kmsan	mm: kmsan: remove runtime checks from kmsan_unpoison_memory()	2024-02-22 10:24:41 -08:00
backing-dev.c	vfs-6.9.misc	2024-03-11 09:38:17 -07:00
balloon_compaction.c
bootmem_info.c	bootmem: use kmemleak_free_part_phys in put_page_bootmem	2023-10-25 16:47:13 -07:00
cma_debug.c
cma_sysfs.c	mm/cma: add sysfs file 'release_pages_success'	2024-02-22 10:24:57 -08:00
cma.c	mm/cma: add sysfs file 'release_pages_success'	2024-02-22 10:24:57 -08:00
cma.h	mm/cma: add sysfs file 'release_pages_success'	2024-02-22 10:24:57 -08:00
compaction.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
debug_page_alloc.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: fix BUG_ON with pud advanced test	2024-02-23 17:27:13 -08:00
debug.c	mm: make dump_page() take a const argument	2024-03-06 13:04:18 -08:00
dmapool_test.c
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
fadvise.c	mm: remove unnecessary pagevec includes	2023-06-23 16:59:31 -07:00
fail_page_alloc.c	mm: page_alloc: split out FAIL_PAGE_ALLOC	2023-06-09 16:25:23 -07:00
failslab.c
filemap.c	mm: cachestat: fix two shmem bugs	2024-03-26 11:07:20 -07:00
folio-compat.c	mm: remove page_add_new_anon_rmap and lru_cache_add_inactive_or_unevictable	2023-12-29 11:58:27 -08:00
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
gup.c	mm: clean up populate_vma_page_range() FOLL_* flag handling	2024-03-29 11:06:13 -07:00
highmem.c	x86/kexec: use pr_err() instead of kexec_dprintk() when an error occurs	2023-12-29 12:22:28 -08:00
hmm.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
huge_memory.c	mm/huge_memory: skip invalid debugfs new_order input for folio split	2024-03-12 13:07:17 -07:00
hugetlb_cgroup.c	mm, hugetlb: remove HUGETLB_CGROUP_MIN_ORDER	2023-10-18 14:34:17 -07:00
hugetlb_vmemmap.c	mm: hugetlb_vmemmap: move mmap lock to vmemmap_remap_range()	2023-12-12 10:57:08 -08:00
hugetlb_vmemmap.h	mm: hugetlb_vmemmap: fix reference to nonexistent file	2023-10-25 16:47:14 -07:00
hugetlb.c	mm: add an explicit smp_wmb() to UFFDIO_CONTINUE	2024-03-12 13:07:17 -07:00
hwpoison-inject.c
init-mm.c	mm: Deprecate pasid field	2023-12-12 10:11:32 +01:00
internal.h	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
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	Kbuild updates for v6.9	2024-03-21 14:41:00 -07:00
Kconfig.debug	mm/slub: unify all sl[au]b parameters with "slab_$param"	2024-01-22 10:31:08 +01:00
khugepaged.c	mm: convert free_swap_cache() to take a folio	2024-03-04 17:01:26 -08:00
kmemleak.c	kmemleak: avoid RCU stalls when freeing metadata for per-CPU pointers	2023-12-12 10:57:07 -08:00
ksm.c	mm: replace set_pte_at_notify() with just set_pte_at()	2024-04-12 04:40:27 -04:00
list_lru.c	mm/zswap: stop lru list shrinking when encounter warm region	2024-02-22 10:24:54 -08:00
maccess.c
madvise.c	mm: madvise: pageout: ignore references rather than clearing young	2024-03-04 17:01:18 -08:00
Makefile	kbuild: make -Woverride-init warnings more consistent	2024-03-31 11:32:26 +09:00
mapping_dirty_helpers.c	mm: fix clean_record_shared_mapping_range kernel-doc	2023-08-24 16:20:30 -07:00
memblock.c	cxl fixes for 6.8-rc6	2024-02-24 15:53:40 -08:00
memcontrol.c	memcg: remove mem_cgroup_uncharge_list()	2024-03-04 17:01:25 -08:00
memfd.c	mm/memfd: refactor memfd_tag_pins() and memfd_wait_for_pins()	2024-03-04 17:01:21 -08:00
memory_hotplug.c	mm/memory_hotplug: export mhp_supports_memmap_on_memory()	2024-02-22 10:24:40 -08:00
memory-failure.c	mm/memory-failure: fix crash in split_huge_page_to_list from soft_offline_page	2024-02-07 21:20:34 -08:00
memory-tiers.c	mm/demotion: print demotion targets	2024-02-22 10:24:55 -08:00
memory.c	Merge x86 bugfixes from Linux 6.9-rc3	2024-04-19 09:02:22 -04:00
mempolicy.c	mm/mempolicy: use a folio in do_mbind()	2024-03-06 13:04:18 -08:00
mempool.c	mempool: kvmalloc pool	2024-03-13 18:38:13 -04:00
memremap.c	mm: remove stale example from comment	2023-12-29 11:58:26 -08:00
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-03-13 12:12:21 -07:00
migrate_device.c	mm: replace set_pte_at_notify() with just set_pte_at()	2024-04-12 04:40:27 -04:00
migrate.c	merge mm-hotfixes-stable into mm-nonmm-stable to pick up stackdepot changes	2024-02-23 17:28:43 -08:00
mincore.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
mlock.c	mm: make folios_put() the basis of release_pages()	2024-03-04 17:01:22 -08:00
mm_init.c	Author: Gang Li padata: dispatch works on	2024-03-06 13:04:17 -08:00
mm_slot.h
mmap_lock.c
mmap.c	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
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	mmu_notifier: remove the .change_pte() callback	2024-04-11 13:18:36 -04:00
mmzone.c	zswap: shrink zswap pool based on memory pressure	2023-12-12 10:57:02 -08:00
mprotect.c	mprotect: use pfn_swap_entry_folio	2024-02-21 16:00:03 -08:00
mremap.c	mm: abstract VMA merge and extend into vma_merge_extend() helper	2023-10-18 14:34:18 -07:00
msync.c
nommu.c	mm/vmalloc: remove vmap_area_list	2024-02-23 17:48:19 -08:00
oom_kill.c	mm: update mark_victim tracepoints fields	2024-03-04 17:01:16 -08:00
page_alloc.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
page_counter.c
page_ext.c	mm/page_ext: move functions around for minor cleanups to page_ext	2023-08-18 10:12:31 -07:00
page_idle.c
page_io.c	zswap: memcontrol: implement zswap writeback disabling	2023-12-29 20:22:11 -08:00
page_isolation.c	mm: add alloc_contig_migrate_range allocation statistics	2024-03-04 17:01:27 -08:00
page_owner.c	mm,page_owner: fix recursion	2024-03-26 11:07:20 -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: convert page_table_check_pte_set() to page_table_check_ptes_set()	2023-08-24 16:20:18 -07:00
page_vma_mapped.c	mm: thp: introduce multi-size THP sysfs interface	2023-12-20 14:48:12 -08:00
page-writeback.c	writeback: remove a use of write_cache_pages() from do_writepages()	2024-02-23 17:48:38 -08:00
pagewalk.c	mm: pagewalk: assert write mmap lock only for walking the user page tables	2023-12-10 16:51:53 -08:00
percpu-internal.h	percpu-internal/pcpu_chunk: re-layout pcpu_chunk structure to reduce false sharing	2023-06-19 16:19:29 -07:00
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c	mm: Introduce flush_cache_vmap_early()	2023-12-14 00:23:17 -08:00
pgalloc-track.h
pgtable-generic.c	mm/pgtable: notes on pte_offset_map[_lock]()	2023-08-18 10:12:25 -07:00
process_vm_access.c	mm: fix process_vm_rw page counts	2023-12-10 16:51:39 -08:00
ptdump.c	mm: ptdump: add check_wx_pages debugfs attribute	2024-02-22 10:24:47 -08:00
readahead.c	mm: support order-1 folios in the page cache	2024-03-04 17:01:19 -08:00
rmap.c	rmap: replace two calls to compound_order with folio_order	2024-02-22 15:27:20 -08:00
rodata_test.c
secretmem.c	mm/secretmem: use a folio in secretmem_fault()	2023-08-21 13:38:02 -07:00
shmem_quota.c	tmpfs: fix race on handling dquot rbtree	2024-03-26 11:07:23 -07:00
shmem.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
show_mem.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-01-08 15:27:15 -08:00
shrinker_debug.c	mm: shrinker: convert shrinker_rwsem to mutex	2023-10-04 10:32:26 -07:00
shrinker.c	mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()	2024-01-05 09:58:32 -08:00
shuffle.c
shuffle.h	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
slab_common.c	- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min	2024-03-14 18:03:09 -07:00
slab.h	Merge branch 'slab/for-6.9/slab-flag-cleanups' into slab/for-linus	2024-03-12 10:16:56 +01:00
slub.c	Merge branch 'slab/for-6.9/slab-flag-cleanups' into slab/for-linus	2024-03-12 10:16:56 +01:00
sparse-vmemmap.c	mm/vmemmap: allow architectures to override how vmemmap optimization works	2023-08-18 10:12:53 -07:00
sparse.c	mm/memory_hotplug: introduce MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers	2024-02-21 16:00:01 -08:00
swap_cgroup.c
swap_slots.c	mm/zswap: invalidate zswap entry when swap entry free	2024-02-22 10:24:54 -08:00
swap_state.c	mm: convert free_swap_cache() to take a folio	2024-03-04 17:01:26 -08:00
swap.c	mm: fix list corruption in put_pages_list	2024-03-12 13:07:16 -07:00
swap.h	mm/swap: fix race when skipping swapcache	2024-02-20 14:20:48 -08:00
swapfile.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
truncate.c	mm: Introduce AS_INACCESSIBLE for encrypted/confidential memory	2024-05-10 13:11:45 -04:00
usercopy.c
userfaultfd.c	userfaultfd: fix deadlock warning when locking src and dst VMAs	2024-03-26 11:07:23 -07:00
util.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
vmalloc.c	mm: vmalloc: fix lockdep warning	2024-04-05 11:21:30 -07:00
vmpressure.c	eventfd: simplify eventfd_signal()	2023-11-28 14:08:38 +01:00
vmscan.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
vmstat.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
workingset.c	mm: move mapping_set_update out of <linux/swap.h>	2024-02-21 11:36:50 +05:30
z3fold.c	mm/z3fold: fix the comment for __encode_handle()	2024-02-23 17:48:31 -08:00
zbud.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zpool.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zsmalloc.c	mm/zsmalloc: don't need to reserve LSB in handle	2024-03-04 17:01:28 -08:00
zswap.c	mm: zswap: fix data loss on SWP_SYNCHRONOUS_IO devices	2024-03-26 11:14:12 -07:00