iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/arch/x86/mm
History
Adam Dunlap 21c5c3f95f x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot 
[ Upstream commit f79936545fb122856bd78b189d3c7ee59928c751 ]

Previously, if copy_from_kernel_nofault() was called before
boot_cpu_data.x86_virt_bits was set up, then it would trigger undefined
behavior due to a shift by 64.

This ended up causing boot failures in the latest version of ubuntu2204
in the gcp project when using SEV-SNP.

Specifically, this function is called during an early #VC handler which
is triggered by a CPUID to check if NX is implemented.

Fixes: 1aa9aa8ee517 ("x86/sev-es: Setup GHCB-based boot #VC handler")
Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Adam Dunlap <acdunlap@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Jacob Xu <jacobhxu@google.com>
Link: https://lore.kernel.org/r/20230912002703.3924521-2-acdunlap@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20 11:51:50 +01:00
..
pat
x86/mm: Allow guest.enc_status_change_prepare() to fail
2023-07-19 16:21:00 +02:00
amdtopology.c
x86/mm: Replace nodes_weight() with nodes_empty() where appropriate
2022-04-10 22:35:38 +02:00
cpu_entry_area.c
x86/sev: Make the #VC exception stacks part of the default stacks storage
2021-10-06 21:48:27 +02:00
debug_pagetables.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
dump_pagetables.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
extable.c
x86: simplify load_unaligned_zeropad() implementation
2022-08-16 11:03:38 -07:00
fault.c
mm: introduce new 'lock_mm_and_find_vma()' page fault helper
2023-07-01 13:16:24 +02:00
highmem_32.c
x86/mm/highmem: Use generic kmap atomic implementation
2020-11-06 23:14:55 +01:00
hugetlbpage.c
arch/x86/mm/hugetlbpage.c: pud_huge() returns 0 when using 2-level paging
2022-11-08 15:57:25 -08:00
ident_map.c
x86/mm/ident_map: Check for errors from ident_pud_init()
2020-10-28 14:48:30 +01:00
init_32.c
x86: mm: rename __is_kernel_text() to is_x86_32_kernel_text()
2021-11-09 10:02:51 -08:00
init_64.c
- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in
2022-10-10 17:53:04 -07:00
init.c
x86/mm: Use mm_alloc() in poking_init()
2023-08-08 20:03:49 +02:00
iomap_32.c
io-mapping: Cleanup atomic iomap
2020-11-06 23:14:58 +01:00
ioremap.c
x86/ioremap: Fix page aligned size calculation in __ioremap_caller()
2022-11-22 12:21:16 +01:00
kasan_init_64.c
memblock: use memblock_free for freeing virtual pointers
2021-11-06 13:30:41 -07:00
kaslr.c
x86/mm: Avoid using set_pgd() outside of real PGD pages
2023-06-28 11:12:27 +02:00
kmmio.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
kmsan_shadow.c
x86: kmsan: handle CPU entry area
2022-10-03 14:03:26 -07:00
maccess.c
x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot
2023-11-20 11:51:50 +01:00
Makefile
x86: kmsan: handle CPU entry area
2022-10-03 14:03:26 -07:00
mem_encrypt_amd.c
x86/sev: Make enc_dec_hypercall() accept a size instead of npages
2023-09-13 09:43:03 +02:00
mem_encrypt_boot.S
objtool: Update Retpoline validation
2022-06-27 10:33:59 +02:00
mem_encrypt_identity.c
x86/mm: Fix use of uninitialized buffer in sme_enable()
2023-03-22 13:34:05 +01:00
mem_encrypt.c
virtio: replace arch_has_restricted_virtio_memory_access()
2022-06-06 08:22:01 +02:00
mm_internal.h
x86/mm: thread pgprot_t through init_memory_mapping()
2020-04-10 15:36:21 -07:00
mmap.c
x86/mm/mmap: Fix -Wmissing-prototypes warnings
2020-04-22 20:19:48 +02:00
mmio-mod.c
x86: Replace cpumask_weight() with cpumask_empty() where appropriate
2022-04-10 22:35:38 +02:00
numa_32.c
x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit
2020-05-28 18:34:30 +02:00
numa_64.c
…
numa_emulation.c
x86/mm: Replace nodes_weight() with nodes_empty() where appropriate
2022-04-10 22:35:38 +02:00
numa_internal.h
…
numa.c
x86/numa: Introduce numa_fill_memblks()
2023-11-20 11:51:50 +01:00
pf_in.c
…
pf_in.h
…
pgprot.c
x86/mm: move protection_map[] inside the platform
2022-07-17 17:14:38 -07:00
pgtable_32.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
pgtable.c
mm: x86: add CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG
2022-09-26 19:46:08 -07:00
physaddr.c
…
physaddr.h
…
pkeys.c
x86/pkeys: Clarify PKRU_AD_KEY macro
2022-06-07 16:06:33 -07:00
pti.c
randstruct: Reorganize Kconfigs and attribute macros
2022-05-08 01:33:06 -07:00
srat.c
…
testmmiotrace.c
…
tlb.c
x86/mm/tlb: Ignore f->new_tlb_gen when zero
2022-07-19 09:04:52 -07:00