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f79936545f
linux/arch/x86/mm
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Adam Dunlap f79936545f x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot 
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: 1aa9aa8ee5 ("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
2023-09-28 22:49:35 +02:00
..
pat x86/mm: Remove _PAGE_DIRTY from kernel RO pages 2023-07-11 14:12:19 -07:00
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/mm: Do not shuffle CPU entry areas without KASLR 2023-03-22 10:42:47 -07:00
debug_pagetables.c x86/mm/dump_pagetables: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:54 -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 x86-64: mm: clarify the 'positive addresses' user address rules 2023-05-03 10:37:22 -07:00
fault.c Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
highmem_32.c x86/mm: Include asm/numa.h for set_highmem_pages_init() 2023-05-18 11:56:18 -07:00
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: Remove Xen-PV leftovers from init_32.c 2023-06-09 11:00:21 +02:00
init_64.c mm/sparse-vmemmap: generalise vmemmap_populate_hugepages() 2022-12-11 18:12:12 -08:00
init.c - Remove unnecessary "INVPCID single" feature tracking 2023-08-30 09:54:00 -07:00
iomap_32.c io-mapping: Cleanup atomic iomap 2020-11-06 23:14:58 +01:00
ioremap.c x86/ioremap: Add hypervisor callback for private MMIO mapping in coco VM 2023-03-26 23:42:40 +02:00
kasan_init_64.c x86/kasan: Populate shadow for shared chunk of the CPU entry area 2022-12-15 10:37:28 -08:00
kaslr.c x86/mm: Avoid using set_pgd() outside of real PGD pages 2023-06-16 11:46:42 -07:00
kmmio.c x86/mm/kmmio: Remove redundant preempt_disable() 2022-12-12 10:54:48 -05:00
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 2023-09-28 22:49:35 +02:00
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 2023-08-25 13:33:48 +02:00
mem_encrypt_boot.S x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros 2022-12-15 10:37:27 -08:00
mem_encrypt_identity.c - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
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() 2023-09-12 16:13:05 -07:00
pf_in.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pf_in.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
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 Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
physaddr.c mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions 2019-12-10 10:12:55 +01:00
physaddr.h
pkeys.c x86/pkeys: Clarify PKRU_AD_KEY macro 2022-06-07 16:06:33 -07:00
pti.c x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros 2022-12-15 10:37:27 -08:00
srat.c x86/apic: Wrap APIC ID validation into an inline 2023-08-09 11:58:30 -07:00
testmmiotrace.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
tlb.c - Remove unnecessary "INVPCID single" feature tracking 2023-08-30 09:54:00 -07:00