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Tue, 5 Aug 2025 06:28:10 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D788620040; Tue, 5 Aug 2025 06:28:09 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BE2D420043; Tue, 5 Aug 2025 06:28:02 +0000 (GMT) Received: from li-621bac4c-27c7-11b2-a85c-c2bf7c4b3c07.ibm.com.com (unknown [9.43.39.141]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 5 Aug 2025 06:28:02 +0000 (GMT) From: Saket Kumar Bhaskar To: bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: hbathini@linux.ibm.com, sachinpb@linux.ibm.com, venkat88@linux.ibm.com, andrii@kernel.org, eddyz87@gmail.com, mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, christophe.leroy@csgroup.eu, naveen@kernel.org, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, memxor@gmail.com, iii@linux.ibm.com, shuah@kernel.org Subject: [bpf-next 1/6] bpf,powerpc: Introduce bpf_jit_emit_probe_mem_store() to emit store instructions Date: Tue, 5 Aug 2025 11:57:42 +0530 Message-ID: <20250805062747.3479221-2-skb99@linux.ibm.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250805062747.3479221-1-skb99@linux.ibm.com> References: <20250805062747.3479221-1-skb99@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CUuaPoBERhcFskGYnC0ub0cAgoTHhzdP X-Authority-Analysis: v=2.4 cv=dNummPZb c=1 sm=1 tr=0 ts=6891a47f cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=2OwXVqhp2XgA:10 a=VnNF1IyMAAAA:8 a=ZRMFVuExfS53ZnwnCJ4A:9 X-Proofpoint-ORIG-GUID: JzARWKijZQTX1fZ4J85RUQnXouNe7SPW X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODA1MDA0NSBTYWx0ZWRfX0ENfDfgj0Yjq EgcNWuRtzGHzQZTZOC3aupYIkdrT8UjwrOop84pJa9XRQMmwiV2HEcyLDgeyK1t3bjpZo3sYtsF y1DLTObRHQ4BwNiZhZxPmVsTOzoWDDGp/Js3x2retZbU6acbuh+ZUJupG4z6X4GroucpAl6QeoO EwlHFoE2uXr2fsmmdUspLGvhAMRf5eamve9Yzlj6BOLtZVkKeIDX4ofYrE5rgIsLhUioqRP5grl PoZ4TvOBW1sXHIUHpDfcg7/jBa1GG73FSrrc1Bz+DMRQ1EMJW3HcsNC1hw8MSM2mZGN5Ef85HrX ZKuSgjyPPO4lqCJdlkpboE/j4llzxM9TT07a7cbylJMHER3bWCkOpURyci3XrslCu5CV1hWWO7H ZiSA1xgeYtfH1SZLpuYGXV8UkTc7npnu8IoqCZfdUPtb6ztT6+c1WSTM1HHIRyaJblN6JFul X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-05_01,2025-08-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 mlxscore=0 clxscore=1015 mlxlogscore=813 malwarescore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 impostorscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2508050045 Content-Type: text/plain; charset="utf-8" bpf_jit_emit_probe_mem_store() is introduced to emit instructions for storing memory values depending on the size (byte, halfword, word, doubleword). Signed-off-by: Saket Kumar Bhaskar --- arch/powerpc/net/bpf_jit_comp64.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_c= omp64.c index 025524378443..489de21fe3d6 100644 --- a/arch/powerpc/net/bpf_jit_comp64.c +++ b/arch/powerpc/net/bpf_jit_comp64.c @@ -409,6 +409,36 @@ asm ( " blr ;" ); =20 +static int bpf_jit_emit_probe_mem_store(struct codegen_context *ctx, u32 s= rc_reg, s16 off, + u32 code, u32 *image) +{ + u32 tmp1_reg =3D bpf_to_ppc(TMP_REG_1); + u32 tmp2_reg =3D bpf_to_ppc(TMP_REG_2); + + switch (BPF_SIZE(code)) { + case BPF_B: + EMIT(PPC_RAW_STB(src_reg, tmp1_reg, off)); + break; + case BPF_H: + EMIT(PPC_RAW_STH(src_reg, tmp1_reg, off)); + break; + case BPF_W: + EMIT(PPC_RAW_STW(src_reg, tmp1_reg, off)); + break; + case BPF_DW: + if (off % 4) { + EMIT(PPC_RAW_LI(tmp2_reg, off)); + EMIT(PPC_RAW_STDX(src_reg, tmp1_reg, tmp2_reg)); + } else { + EMIT(PPC_RAW_STD(src_reg, tmp1_reg, off)); + } + break; + default: + return -EINVAL; + } + return 0; +} + static int emit_atomic_ld_st(const struct bpf_insn insn, struct codegen_co= ntext *ctx, u32 *image) { u32 code =3D insn.code; --=20 2.43.5