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GET /api/patches/2218503/?format=api
{ "id": 2218503, "url": "http://patchwork.ozlabs.org/api/patches/2218503/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260401141043.41513-2-adubey@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260401141043.41513-2-adubey@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260401141043.41513-2-adubey@linux.ibm.com/", "date": "2026-04-01T14:10:43", "name": "[v3,2/2] powerpc32/bpf: Add fsession support", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "1476029d3c3d5af47ffccad8447e25261e87bc68", "submitter": { "id": 88541, "url": "http://patchwork.ozlabs.org/api/people/88541/?format=api", "name": "adubey", "email": "adubey@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260401141043.41513-2-adubey@linux.ibm.com/mbox/", "series": [ { "id": 498309, "url": "http://patchwork.ozlabs.org/api/series/498309/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498309", "date": "2026-04-01T14:10:42", "name": "[v3,1/2] powerpc64/bpf: Implement fsession support", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/498309/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218503/comments/", 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bh=CGX2BxravPhjNaKGi\n\tBnooGVgZkanfY7myAbh6oOEX7c=; b=L+axV1XTOhvisjXF1RJUQLvT/45v9OPqT\n\t2lmjCOU+ZLLK4nBgcsfIdm+fDPLYHyqzRVN00QvsdcwWH03U5aW+Eg2c7Vj9WYf8\n\trIh/vmeda+TADAIBA4gEVL2TIhpIcKMY0UzlVvnUG9hwNj/ZRaRUexQnZksYMvWf\n\tSERDAPlils+PnSbRl+hU/RSADAaki4eqzIcEOQtaB3wo7hh9qxSOZ7Ec6Qc+Ax/5\n\toacdZ3eLuFoBHZ+B72DVOghBM5c2tsaZqd3C8fJKeJCv572ccqEOKeF9G8R3omYH\n\t12Gdk5RHvydFIU5SCnuD5wmE8pp6R3ZbdJZEBXTLa6nCJV7WvSn/Q==", "From": "adubey@linux.ibm.com", "To": "linuxppc-dev@lists.ozlabs.org", "Cc": "hbathini@linux.ibm.com, bpf@vger.kernel.org, maddy@linux.ibm.com,\n ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net,\n shuah@kernel.org, linux-kselftest@vger.kernel.org,\n Abhishek Dubey <adubey@linux.ibm.com>", "Subject": "[PATCH v3 2/2] powerpc32/bpf: Add fsession support", "Date": "Wed, 1 Apr 2026 10:10:43 -0400", "Message-ID": "<20260401141043.41513-2-adubey@linux.ibm.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<20260401141043.41513-1-adubey@linux.ibm.com>", "References": "<20260401141043.41513-1-adubey@linux.ibm.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDAxMDA4OSBTYWx0ZWRfXwmv2NinnLIS4\n 5xgR9JLv3ty7l7Me4MlNvw5IxzykXtiIKbflMMJ3AF2fam6tExWd8hRyxjB4VcN+SJWV6Uxu69k\n 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definitions=2026-04-01_03,2026-04-01_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n lowpriorityscore=0 phishscore=0 adultscore=0 impostorscore=0 clxscore=1015\n spamscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 malwarescore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604010089", "X-Spam-Status": "No, score=1.7 required=3.0 tests=DATE_IN_FUTURE_03_06,\n\tDKIM_SIGNED,DKIM_VALID,RCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,\n\tRCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8", "X-Spam-Level": "*", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "From: Abhishek Dubey <adubey@linux.ibm.com>\n\nExtend JIT support of fsession in powerpc64 trampoline, since\nppc64 and ppc32 shares common trampoline implementation.\nArch specific helpers handle 64-bit data copy using 32 bit regs.\n\nNeed to validate fsession support along with trampoline support.\n\nSigned-off-by: Abhishek Dubey <adubey@linux.ibm.com>\n---\n\nv2->v3:\n Address comments around PPC_LI32\nv1->v2:\n No change since v1\n \n[v2]: https://lore.kernel.org/bpf/20260226041217.18059-1-adubey@linux.ibm.com\n[v1]: https://lore.kernel.org/bpf/20260216155310.38457-1-adubey@linux.ibm.com\n\n arch/powerpc/net/bpf_jit_comp.c | 8 ++++++-\n arch/powerpc/net/bpf_jit_comp32.c | 35 +++++++++++++++++++++++++++++++\n 2 files changed, 42 insertions(+), 1 deletion(-)", "diff": "diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c\nindex 16d15ff3145a..b2fdf8ff9c60 100644\n--- a/arch/powerpc/net/bpf_jit_comp.c\n+++ b/arch/powerpc/net/bpf_jit_comp.c\n@@ -542,7 +542,13 @@ bool bpf_jit_supports_private_stack(void)\n \n bool bpf_jit_supports_fsession(void)\n {\n-\treturn IS_ENABLED(CONFIG_PPC64);\n+\t/*\n+\t * TODO: Remove after validating support\n+\t * for fsession and trampoline on ppc32.\n+\t */\n+\tif (IS_ENABLED(CONFIG_PPC32))\n+\t\treturn -EOPNOTSUPP;\n+\treturn true;\n }\n \n bool bpf_jit_supports_arena(void)\ndiff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c\nindex 3087e744fb25..f3ae89e1d1d0 100644\n--- a/arch/powerpc/net/bpf_jit_comp32.c\n+++ b/arch/powerpc/net/bpf_jit_comp32.c\n@@ -123,6 +123,41 @@ void bpf_jit_realloc_regs(struct codegen_context *ctx)\n \t}\n }\n \n+void prepare_for_fsession_fentry(u32 *image, struct codegen_context *ctx, int cookie_cnt,\n+\t\t\t\t\t\tint cookie_off, int retval_off)\n+{\n+\t/*\n+\t * Set session cookies value\n+\t * Clear cookies field on stack\n+\t * Ensure retval to be cleared on fentry\n+\t */\n+\tEMIT(PPC_RAW_LI(bpf_to_ppc(TMP_REG), 0));\n+\n+\tfor (int i = 0; i < cookie_cnt; i++) {\n+\t\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, cookie_off + 4 * i));\n+\t\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, cookie_off + 4 * i + 4));\n+\t}\n+\n+\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, retval_off));\n+\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, retval_off + 4));\n+}\n+\n+void store_func_meta(u32 *image, struct codegen_context *ctx,\n+\t\t\t\t\tu64 func_meta, int func_meta_off)\n+{\n+\t/*\n+\t * Store func_meta to stack: [R1 + func_meta_off] = func_meta\n+\t * func_meta := argument count in first byte + cookie value\n+\t */\n+\t/* Store lower word */\n+\tEMIT(PPC_RAW_LI32(bpf_to_ppc(TMP_REG), (u32)func_meta));\n+\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, func_meta_off));\n+\n+\t/* Store upper word */\n+\tEMIT(PPC_RAW_LI32(bpf_to_ppc(TMP_REG), (u32)(func_meta >> 32)));\n+\tEMIT(PPC_RAW_STW(bpf_to_ppc(TMP_REG), _R1, func_meta_off + 4));\n+}\n+\n void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx)\n {\n \tint i;\n", "prefixes": [ "v3", "2/2" ] }