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author | Ilya Leoshkevich <iii@linux.ibm.com> | 2019-11-15 15:37:22 +0300 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-11-16 00:25:00 +0300 |
commit | b7b3fc8dd95bc02bd30680da258e09dda55270db (patch) | |
tree | f495c80bad776b25b2734b3257f6906de6b9365d /samples/bpf | |
parent | e47a179997ceee6864fbae620eee09ea9c345a4d (diff) | |
download | linux-b7b3fc8dd95bc02bd30680da258e09dda55270db.tar.xz |
bpf: Support doubleword alignment in bpf_jit_binary_alloc
Currently passing alignment greater than 4 to bpf_jit_binary_alloc does
not work: in such cases it silently aligns only to 4 bytes.
On s390, in order to load a constant from memory in a large (>512k) BPF
program, one must use lgrl instruction, whose memory operand must be
aligned on an 8-byte boundary.
This patch makes it possible to request 8-byte alignment from
bpf_jit_binary_alloc, and also makes it issue a warning when an
unsupported alignment is requested.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20191115123722.58462-1-iii@linux.ibm.com
Diffstat (limited to 'samples/bpf')
0 files changed, 0 insertions, 0 deletions