diff options
| author |   Lorenz Bauer <lmb@isovalent.com> | 2025-05-20 14:01:17 +0100 |
|---|---|---|
| committer |   Andrii Nakryiko <andrii@kernel.org> | 2025-05-23 10:06:28 -0700 |
| commit | a539e2a6d51d1c12d89eec149ccc72ec561639bc (patch) | |
| tree | c8e9888164351ac45c4fe6859f4bc3a6b45fea0c /include/asm-generic | |
| parent | bpf, sockmap: Avoid using sk_socket after free when sending (diff) | |
| download | wireguard-linux-a539e2a6d51d1c12d89eec149ccc72ec561639bc.tar.xz wireguard-linux-a539e2a6d51d1c12d89eec149ccc72ec561639bc.zip | |
btf: Allow mmap of vmlinux btf
User space needs access to kernel BTF for many modern features of BPF.
Right now each process needs to read the BTF blob either in pieces or
as a whole. Allow mmaping the sysfs file so that processes can directly
access the memory allocated for it in the kernel.
remap_pfn_range is used instead of vm_insert_page due to aarch64
compatibility issues.
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Link: https://lore.kernel.org/bpf/20250520-vmlinux-mmap-v5-1-e8c941acc414@isovalent.com
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 58a635a6d5bd..1750390735fa 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -667,10 +667,11 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG) */ #ifdef CONFIG_DEBUG_INFO_BTF #define BTF \ + . = ALIGN(PAGE_SIZE); \ .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ BOUNDED_SECTION_BY(.BTF, _BTF) \ } \ - . = ALIGN(4); \ + . = ALIGN(PAGE_SIZE); \ .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ *(.BTF_ids) \ } |