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{ "id": 2231985, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2231985/?format=api", "web_url": "http://patchwork.ozlabs.org/project/opensbi/cover/20260501211627.3293126-1-evvoevod@tenstorrent.com/", "project": { "id": 67, "url": "http://patchwork.ozlabs.org/api/1.2/projects/67/?format=api", "name": "OpenSBI development", "link_name": "opensbi", "list_id": "opensbi.lists.infradead.org", "list_email": "opensbi@lists.infradead.org", "web_url": "https://github.com/riscv/opensbi", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "https://github.com/riscv/opensbi/commit/{}" }, "msgid": "<20260501211627.3293126-1-evvoevod@tenstorrent.com>", "list_archive_url": null, "date": "2026-05-01T21:16:22", "name": "[v2,0/5] Add RISC-V Smrnmi extension support", "submitter": { "id": 92832, "url": "http://patchwork.ozlabs.org/api/1.2/people/92832/?format=api", "name": "Evgeny Voevodin", "email": "evvoevod@tenstorrent.com" }, "mbox": "http://patchwork.ozlabs.org/project/opensbi/cover/20260501211627.3293126-1-evvoevod@tenstorrent.com/mbox/", "series": [ { "id": 502498, "url": "http://patchwork.ozlabs.org/api/1.2/series/502498/?format=api", "web_url": "http://patchwork.ozlabs.org/project/opensbi/list/?series=502498", "date": "2026-05-01T21:16:26", "name": "Add RISC-V Smrnmi extension support", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502498/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2231985/comments/", "headers": { "Return-Path": "\n <opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=J4zObdrd;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=tenstorrent.com header.i=@tenstorrent.com\n header.a=rsa-sha256 header.s=google header.b=RB44gI4g;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; 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The original\n message has been attached to this so you can view it or label\n similar future email. If you have any questions, see\n the administrator of that system for details.\n Content preview: This is v2 of the Smrnmi series. Rebased on top of\n upstream/master\n at commit 2257e9957103 (\"lib: sbi_bitmap_test: add tests for\n bitmap_empty()\").\n v1 thread:\n https://lore.kernel.org/opensbi/20260310183155.2186463-1-evvoevod@oss.tenstorrent.com/ \n Content analysis details: (-2.1 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no\n trust\n [2607:f8b0:4864:20:0:0:0:122e listed in]\n [list.dnswl.org]\n -0.0 SPF_PASS SPF: sender matches SPF record\n 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record\n -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from\n envelope-from domain\n -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n author's\n domain\n 0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n not necessarily valid\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\n -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]", "X-BeenThere": "opensbi@lists.infradead.org", "X-Mailman-Version": "2.1.34", "Precedence": "list", "List-Id": "<opensbi.lists.infradead.org>", "List-Unsubscribe": "<http://lists.infradead.org/mailman/options/opensbi>,\n <mailto:opensbi-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/opensbi/>", "List-Post": "<mailto:opensbi@lists.infradead.org>", "List-Help": "<mailto:opensbi-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/opensbi>,\n <mailto:opensbi-request@lists.infradead.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Sender": "\"opensbi\" <opensbi-bounces@lists.infradead.org>", "Errors-To": "opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org" }, "content": "This is v2 of the Smrnmi series. Rebased on top of upstream/master at\ncommit 2257e9957103 (\"lib: sbi_bitmap_test: add tests for bitmap_empty()\").\n\nv1 thread:\nhttps://lore.kernel.org/opensbi/20260310183155.2186463-1-evvoevod@oss.tenstorrent.com/\n\nChanges vs v1:\n\n- Dropped patches 6/7 and 7/7 (Tenstorrent platform support). They will\n go through the Atlantis platform series instead.\n\n- Dropped _rnme_handler assembly entry point, ops->rnme_handler callback\n and sbi_rnme_handler() C function. RNME path now reuses the existing\n _trap_handler since RNME is taken as a regular M-mode trap with NMIE=0.\n ops->smrnmi_handlers_init() now passes _trap_handler in place of\n _rnme_handler.\n\n- Renamed _rnmi_handler to _trap_rnmi_handler.\n- Renamed C handler to sbi_trap_rnmi_handler().\n\n- Kept ops->rnmi_handler as the temporary RNMI dispatch mechanism, per\n the v1 discussion. Extending sbi_irqchip to support NMIs is left for\n a separate follow-up series.\n\nBetween v1 and v2, upstream introduced ecdb6c90 (\"firmware: Initialize\nstack guard via Zkr\"). The Zkr seed-CSR access can trap if Zkr is not\nimplemented. On Smrnmi platforms NMIE=0 by default after reset, which\nroutes that trap to NMEVEC rather than MTVEC. Until Smrnmi handlers are\ninstalled and NMIE=1, no NMEVEC handler is in place, so the early-boot\nZkr probe in _start would crash. To handle this, a new patch (4/5)\nrefactors the inline seed loop in fw_base.S into a callable\n__stack_chk_guard_init function and invokes it from init_coldboot()\nafter sbi_hart_init() has installed Smrnmi handlers and set NMIE=1.\n\nTesting: Verified on Whisper SW system simulator and on HW emulator.\n\nEvgeny Voevodin (5):\n include: sbi_scratch: Add tmp1 scratch space for RNMI context saving\n lib: sbi: Add Smrnmi extension macros for registers and bits\n firmware: Add RNMI handler infrastructure\n lib: sbi: Create a spot to place Smrnmi detection before traps and\n after DT is ready\n lib: sbi: hart: Detect and enable Smrnmi before trap-based feature\n detection\n\n firmware/fw_base.S | 188 ++++++++++++++++++++++++++++++-----\n include/sbi/riscv_encoding.h | 10 ++\n include/sbi/sbi_hart.h | 2 +\n include/sbi/sbi_platform.h | 8 ++\n include/sbi/sbi_scratch.h | 11 +-\n include/sbi/sbi_trap.h | 2 +\n lib/sbi/sbi_hart.c | 37 +++++--\n lib/sbi/sbi_init.c | 10 ++\n lib/sbi/sbi_trap.c | 39 ++++++++\n 9 files changed, 273 insertions(+), 34 deletions(-)\n\n\nbase-commit: 2257e9957103aac7df8089a59b9d4bdda7c592ce" }