[PATCH 0/2] riscv, bpf: fix reads of thread_info.cpu

From: "Radim Krčmář" <rkrcmar@ventanamicro.com>
To: bpf@vger.kernel.org
Cc: "Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Martin KaFai Lau" <martin.lau@linux.dev>,
	"Eduard Zingerman" <eddyz87@gmail.com>,
	"Song Liu" <song@kernel.org>,
	"Yonghong Song" <yonghong.song@linux.dev>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"KP Singh" <kpsingh@kernel.org>,
	"Stanislav Fomichev" <sdf@fomichev.me>,
	"Hao Luo" <haoluo@google.com>, "Jiri Olsa" <jolsa@kernel.org>,
	"Björn Töpel" <bjorn@kernel.org>, "Pu Lehui" <pulehui@huawei.com>,
	"Puranjay Mohan" <puranjay@kernel.org>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexandre Ghiti" <alex@ghiti.fr>,
	"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] riscv, bpf: fix reads of thread_info.cpu
Date: Tue, 12 Aug 2025 11:02:54 +0200	[thread overview]
Message-ID: <20250812090256.757273-2-rkrcmar@ventanamicro.com> (raw)

Hello,

These patches are related to a recently queued series [1] that fixes the
same bugs in normal code.  That series finishes with a patch that would
have exposed the BPF bugs, but luckily it won't get merged until v6.18.

I don't know enough about BPF to verify that it emits the correct code
now, so any pointers are welcome.

1: https://lore.kernel.org/linux-riscv/20250725165410.2896641-3-rkrcmar@ventanamicro.com/

Radim Krčmář (2):
  riscv, bpf: use lw when reading int cpu in BPF_MOV64_PERCPU_REG
  riscv, bpf: use lw when reading int cpu in bpf_get_smp_processor_id

 arch/riscv/net/bpf_jit_comp64.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.50.0