d65f3767de
Since f663a03c8e35 ("bpf, x64: Remove tail call detection"),
tail_call_reachable won't be detected in x86 JIT. And, tail_call_reachable
is provided by verifier.
Therefore, in test_bpf, the tail_call_reachable must be provided in test
cases before running.
Fix and test:
[ 174.828662] test_bpf: #0 Tail call leaf jited:1 170 PASS
[ 174.829574] test_bpf: #1 Tail call 2 jited:1 244 PASS
[ 174.830363] test_bpf: #2 Tail call 3 jited:1 296 PASS
[ 174.830924] test_bpf: #3 Tail call 4 jited:1 719 PASS
[ 174.831863] test_bpf: #4 Tail call load/store leaf jited:1 197 PASS
[ 174.832240] test_bpf: #5 Tail call load/store jited:1 326 PASS
[ 174.832240] test_bpf: #6 Tail call error path, max count reached jited:1 2214 PASS
[ 174.835713] test_bpf: #7 Tail call count preserved across function calls jited:1 609751 PASS
[ 175.446098] test_bpf: #8 Tail call error path, NULL target jited:1 472 PASS
[ 175.447597] test_bpf: #9 Tail call error path, index out of range jited:1 206 PASS
[ 175.448833] test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [10/10 JIT'ed]
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202406251415.c51865bc-oliver.sang@intel.com
Fixes: f663a03c8e35 ("bpf, x64: Remove tail call detection")
Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
Link: https://lore.kernel.org/r/20240625145351.40072-1-hffilwlqm@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.