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Thu, 26 Feb 2026 20:43:03 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 61QKgxCB53543280 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 26 Feb 2026 20:42:59 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5F01420040; Thu, 26 Feb 2026 20:42:59 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C89332004D; Thu, 26 Feb 2026 20:42:57 +0000 (GMT) Received: from ltcrain4-lp15.ltc.tadn.ibm.com (unknown [9.5.7.39]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 26 Feb 2026 20:42:57 +0000 (GMT) From: adubey@linux.ibm.com To: linuxppc-dev@lists.ozlabs.org Cc: bpf@vger.kernel.org, hbathini@linux.ibm.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, maddy@linux.ibm.com, Abhishek Dubey Subject: [PATCH v2 1/4] powerpc64/bpf: Add support for instruction array Date: Thu, 26 Feb 2026 20:43:08 -0500 Message-ID: <20260227014315.39980-2-adubey@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260227014315.39980-1-adubey@linux.ibm.com> References: <20260227014315.39980-1-adubey@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjI2MDE4NCBTYWx0ZWRfX0dKRMYXX1z0P aZVMaKcpepsZvd553PhuDvZYCKSwGrJ4ydhWzsYLYhFw1aOXM/aIldhVGZLHpVM/scyDbZ5LMYF rngiEJEmHDtS9+GThU6D1opI3fUfRhi569Aw9YaOQDP9Khhdi/gCGAEGeO5oA39UEEjQIH3+rzv MGWLbZaC8yldG7w62kR2iYcUFURJM9kPzjrgfZQoxfHgP/KwdMVbGvZwTyTJJTQ8bkT1MowRTwb Aae8BsQjQUbcpQWhE4DAPYbuOmOXbXAAaNaxy9FIy7aGBU/dvIJDaAQYEhfA4GSlr7jJm2jUiEu QlrBMXyzlGr08cQj2QB1XNPuTcZ+XnDimWPyOhe+LOdtfw9G1uWOVLKanjN5EuJCtmLKoXLmpGo Oo7Naj/rMh5s3j0uO0t1Mb68FUp50NEv8s0YwHFu56bsxJ6JThQphL6cJES3iSQgM6k7NyRxINy SkPbp06XG7djnE2zOyw== X-Proofpoint-GUID: tDvbQVyyww5WXtw8wdP36DSiRj8mXkBR X-Authority-Analysis: v=2.4 cv=S4HUAYsP c=1 sm=1 tr=0 ts=69a0b058 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VnNF1IyMAAAA:8 a=7L3SHwMVhhBtGsoEfKUA:9 X-Proofpoint-ORIG-GUID: tDvbQVyyww5WXtw8wdP36DSiRj8mXkBR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-26_02,2026-02-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 clxscore=1015 impostorscore=0 malwarescore=0 bulkscore=0 phishscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602260184 From: Abhishek Dubey On loading the BPF program, the verifier might adjust/omit some instructions. The adjusted instruction offset is accounted in the map containing original instruction -> xlated mapping. This patch add ppc64 JIT support to additionally build the xlated->jitted mapping for every instruction present in instruction array. This change is needed to enable support for indirect jumps, added in a subsequent patch. Invoke bpf_prog_update_insn_ptrs() with offset pair of xlated_offset and jited_offset. The offset mapping is already available, which is being used for bpf_prog_fill_jited_linfo() and can be directly used for bpf_prog_update_insn_ptrs() as well. Additional details present at: commit b4ce5923e780 ("bpf, x86: add new map type: instructions array") Signed-off-by: Abhishek Dubey --- arch/powerpc/net/bpf_jit_comp.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index 9ec5ab9b020e..620667c3400b 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -373,6 +373,16 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp) goto out_addrs; } bpf_prog_fill_jited_linfo(fp, addrs); + /* + * On ABI V1, executable code starts after the function + * descriptor, so adjust base accordingly. + */ +#ifdef CONFIG_PPC64_ELF_ABI_V1 + bpf_prog_update_insn_ptrs(fp, addrs, + (void *)fimage + FUNCTION_DESCR_SIZE); +#else + bpf_prog_update_insn_ptrs(fp, addrs, fimage); +#endif out_addrs: if (!image && priv_stack_ptr) { fp->aux->priv_stack_ptr = NULL; -- 2.52.0