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| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-09-24 10:32:20 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-09-24 10:32:20 +0300 |
| commit | f04de6d8f252ec6434b846895474cc205527b8b8 (patch) | |
| tree | f76726f77633019258f0e53c9127d0a843da73e5 /lib/asn1_encoder.c | |
| parent | e86935f705fa732d8c7c3ecf0c50ea461ffab76f (diff) | |
| download | linux-f04de6d8f252ec6434b846895474cc205527b8b8.tar.xz | |
LoongArch: Add ARCH_HAS_SET_DIRECT_MAP support
Add set_direct_map_*() functions for setting the direct map alias for
the page to its default permissions and to an invalid state that cannot
be cached in a TLB. (See d253ca0c3 ("x86/mm/cpa: Add set_direct_map_*()
functions")) Add a similar implementation for LoongArch.
This fixes the KFENCE warnings during hibernation:
==================================================================
BUG: KFENCE: invalid read in swsusp_save+0x368/0x4d8
Invalid read at 0x00000000f7b89a3c:
swsusp_save+0x368/0x4d8
hibernation_snapshot+0x3f0/0x4e0
hibernate+0x20c/0x440
state_store+0x128/0x140
kernfs_fop_write_iter+0x160/0x260
vfs_write+0x2c0/0x520
ksys_write+0x74/0x160
do_syscall+0xb0/0x160
CPU: 0 UID: 0 PID: 812 Comm: bash Tainted: G B 6.11.0-rc1+ #1566
Tainted: [B]=BAD_PAGE
Hardware name: Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0 10/21/2022
==================================================================
Note: We can only set permissions for KVRANGE/XKVRANGE kernel addresses.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'lib/asn1_encoder.c')
0 files changed, 0 insertions, 0 deletions