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From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Andrii Nakryiko <andrii@kernel.org>, Yonghong Song <yhs@fb.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	John Fastabend <john.fastabend@gmail.com>,
	bpf <bpf@vger.kernel.org>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>
Subject: Re: [PATCH v7 bpf-next 00/10] Add BTF_KIND_FLOAT support
Date: Thu, 4 Mar 2021 18:36:52 -0800	[thread overview]
Message-ID: <CAADnVQ+21PGMnZAOb5oU7o9Gami2qE-UtqF0H2xcWy=WA9q93w@mail.gmail.com> (raw)
In-Reply-To: <20210226202256.116518-1-iii@linux.ibm.com>

On Fri, Feb 26, 2021 at 12:23 PM Ilya Leoshkevich <iii@linux.ibm.com> wrote:
>
> Some BPF programs compiled on s390 fail to load, because s390
> arch-specific linux headers contain float and double types.
>
> Introduce support for such types by representing them using the new
> BTF_KIND_FLOAT. This series deals with libbpf, bpftool, in-kernel BTF
> parser as well as selftests and documentation.
>
> There are also pahole and LLVM parts:
>
> * https://github.com/iii-i/dwarves/commit/btf-kind-float-v2
> * https://reviews.llvm.org/D83289
...
> v6 -> v7: John suggested to add a comment explaining why sanitization
>           does not preserve the type name, as well as what effect it has
>           on running the code on the older kernels.
>           Yonghong has asked to add a comment explaining why we are not
>           checking the alignment very precisely in the kernel.
>           John suggested to add a bpf_core_field_size test (commit #9).

Applied without patch 9, since it crashes current llvm.
Please work with Yonghong to land llvm support
and resubmit the selftest along with an update to selftest/bpf/README.rst
that needs to explain which llvm commit is needed to pass the test.

Thanks!

      parent reply	other threads:[~2021-03-05  2:37 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-26 20:22 Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 01/10] bpf: Add BTF_KIND_FLOAT to uapi Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 02/10] libbpf: Fix whitespace in btf_add_composite() comment Ilya Leoshkevich
2021-02-26 23:32   ` Yonghong Song
2021-02-26 20:22 ` [PATCH v7 bpf-next 03/10] libbpf: Add BTF_KIND_FLOAT support Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 04/10] tools/bpftool: " Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 05/10] selftests/bpf: Use the 25th bit in the "invalid BTF_INFO" test Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 06/10] bpf: Add BTF_KIND_FLOAT support Ilya Leoshkevich
2021-02-26 23:33   ` Yonghong Song
2021-02-26 20:22 ` [PATCH v7 bpf-next 07/10] selftest/bpf: Add BTF_KIND_FLOAT tests Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 08/10] selftests/bpf: Add BTF_KIND_FLOAT to the existing deduplication tests Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 09/10] selftests/bpf: Add BTF_KIND_FLOAT to test_core_reloc_size Ilya Leoshkevich
2021-02-26 20:22 ` [PATCH v7 bpf-next 10/10] bpf: Document BTF_KIND_FLOAT in btf.rst Ilya Leoshkevich
2021-03-05  2:36 ` Alexei Starovoitov [this message]

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