Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.1/patches/2221538/?format=api
{ "id": 2221538, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2221538/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260409155344.2849233-2-bruno.vilaca.sa@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260409155344.2849233-2-bruno.vilaca.sa@gmail.com>", "date": "2026-04-09T15:53:42", "name": "[1/2] target/riscv: preserve RV32 henvcfgh on henvcfg writes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b7ab9ecb9287179db25e7d2137254880e850daf0", "submitter": { "id": 93104, "url": "http://patchwork.ozlabs.org/api/1.1/people/93104/?format=api", "name": "Bruno Sa", "email": "bruno.vilaca.sa@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260409155344.2849233-2-bruno.vilaca.sa@gmail.com/mbox/", "series": [ { "id": 499332, "url": "http://patchwork.ozlabs.org/api/1.1/series/499332/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499332", "date": "2026-04-09T15:53:42", "name": "target/riscv: fix RV32 henvcfg/stateen CSR handling", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499332/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221538/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221538/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.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 unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=KbvZJwFO;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fs6Lb4L4Pz1yJK\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 10 Apr 2026 03:27:01 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wAt9C-0008R9-PQ; Thu, 09 Apr 2026 13:26:30 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <bruno.vilaca.sa@gmail.com>)\n id 1wArho-0000Ob-6v\n for qemu-devel@nongnu.org; Thu, 09 Apr 2026 11:54:08 -0400", "from mail-wr1-x42a.google.com ([2a00:1450:4864:20::42a])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <bruno.vilaca.sa@gmail.com>)\n id 1wArhm-0001Zh-R0\n for qemu-devel@nongnu.org; Thu, 09 Apr 2026 11:54:07 -0400", "by mail-wr1-x42a.google.com with SMTP id\n ffacd0b85a97d-43cf73bbfbdso660560f8f.1\n for <qemu-devel@nongnu.org>; Thu, 09 Apr 2026 08:54:06 -0700 (PDT)", "from ninolomata-AERO-15-KC.. (89-181-36-85.net.novis.pt.\n [89.181.36.85]) by smtp.gmail.com with ESMTPSA id\n ffacd0b85a97d-43d1e2c5468sm67259292f8f.13.2026.04.09.08.54.03\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Thu, 09 Apr 2026 08:54:04 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=gmail.com; s=20251104; t=1775750045; x=1776354845; darn=nongnu.org;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=4uNRjVzBrfQNBjxA8Suax0mc4RuGUSF8x1sHTO0A3nY=;\n b=KbvZJwFOURByk9ME58wsPt6iV36LaKvgpsKikptm+v69i1eREDyMHBnIesCW+VDf99\n qgFaSQyp33TIcxaVmWoClHII/LZ4V0ASP+Zh5hK2NDocMixgxEO+XsgivwH/MTyKHL1l\n cDOXZ1CWh8po6Ngl7kk3SZYMhQFq5LIfDalDRVEsI8nE1QdS7NCJsAM3bHAewL/PoMTO\n Ysr1aUmtFFVDdSKvJvx/6zmo3eJ410+kW+4tpsdbALGPCfu4cc4n/kbcAca121QNBNnn\n KlR38xtnGTVx10SFKRTKYIGEYEtre+SIuJ/hxbki38QHvyS6P838Lmcq/9Vhx+QMCMeL\n uMYg==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1775750045; x=1776354845;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=4uNRjVzBrfQNBjxA8Suax0mc4RuGUSF8x1sHTO0A3nY=;\n b=NG+Papdo/YSaHtBPSMIdDAqaEA2Uhnxr9/ujmcQC0NMueZZWnkCLe8pBhVg8uvx7+S\n r3kFDKFHijzvsksAKuT8febU52kEPqA3G2rUne3bRO2iWf4kHBsXpB3vHqKno45Br+8s\n ACB/5SZBo9yP1gfLMctTztau6a42n6gJPeTkJBU8QnLk1uVyIc2erBxHY4m4Xt1o81v2\n yXxkUGfF08NKlYys2rKU0hTh9ATiPPT9UTczOVkCwC2qZmSoBCQ6x7dSFcMn15dqPd8C\n EiAueFb0VButvXDni5c50CvMsJjYgWQ/hOXIo9lqUexPVXTuWbXYzPQigK5aP3AjV1ZB\n xdKQ==", "X-Gm-Message-State": "AOJu0YwSDILslu/OOswogJ6QMNQWzKOio7cXjhAP4258BBTdBUH2vDKu\n AbM9LC/Ou6zBoGF4JYeQbBYyrY3HaT2y2OxWI6d4qTdSZY+z2WXmfzy5L986mUGu+yY9YQ==", "X-Gm-Gg": "AeBDievPgYqJljTia4Cl31L3pBqOF5j/A8AIK7b7eUP5UgSBjb0n9KHW3NXc76lq266\n wE+SYxmKz4y57PM/OXv5X1/wnaTh0SBVpQXfSORMDiiKyyaH9uOLCZF6Cz8Gce+HQViT0aWz4k0\n pmjbAcuXdnOZj8Cr1a6d3nFzGbGKo35gKCag2Z3IkTL2SOJ9jGxI1EUQ0wTOzmhW4ueneQYQaHi\n ykiOHO2g/BswNFr73ukcnvElpHOjaolj+irMJKvWlfSo43o17QlfKC1KvBTwETi9LKELWBtEQ9K\n bXar+aBllI9yd3R4utxKvSY5v1wuHRghFOqdq0oom9l1Kcf1pG48mDUg52BbXspFTD8RsjZo92x\n eAIn+NlMkr1RNsg8uHEKw2n6bm6sl/VwbsyN6dhMvBnfUVzUef+MCB5+XvnCUPWV96aBiHOpgV/\n M62FRpSytB9r1ufI8ExuAXR8f2s3P5fGrJ2SRoW4L54l4H5e2TKLazQTnm3Aa31y180cOP", "X-Received": "by 2002:a05:6000:228a:b0:43d:4e2e:368b with SMTP id\n ffacd0b85a97d-43d5a1a28e0mr5380211f8f.40.1775750044995;\n Thu, 09 Apr 2026 08:54:04 -0700 (PDT)", "From": "Bruno Sa <bruno.vilaca.sa@gmail.com>", "To": "qemu-devel@nongnu.org", "Cc": "qemu-riscv@nongnu.org, palmer@dabbelt.com, alistair.francis@wdc.com,\n liwei1518@gmail.com, dbarboza@ventanamicro.com,\n zhiwei_liu@linux.alibaba.com, Bruno Sa <bruno.vilaca.sa@gmail.com>", "Subject": "[PATCH 1/2] target/riscv: preserve RV32 henvcfgh on henvcfg writes", "Date": "Thu, 9 Apr 2026 16:53:42 +0100", "Message-ID": "<20260409155344.2849233-2-bruno.vilaca.sa@gmail.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260409155344.2849233-1-bruno.vilaca.sa@gmail.com>", "References": "<20260409155344.2849233-1-bruno.vilaca.sa@gmail.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2a00:1450:4864:20::42a;\n envelope-from=bruno.vilaca.sa@gmail.com; helo=mail-wr1-x42a.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no", "X-Spam_action": "no action", "X-Mailman-Approved-At": "Thu, 09 Apr 2026 13:26:29 -0400", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "On RV32, STCE/ADUE/PBMTE/DTE are implemented in henvcfgh. A write to\nhenvcfg should therefore only update the low 32 bits of env->henvcfg.\n\nThe current write_henvcfg() path overwrites env->henvcfg with the\nlow-half value and clears any bits previously written via henvcfgh.\n\nPreserve the upper 32 bits on RV32 henvcfg writes and keep the existing\nRV64 behaviour unchanged.\n\nSigned-off-by: Bruno Sa <bruno.vilaca.sa@gmail.com>\n---\n target/riscv/csr.c | 10 +++++++++-\n 1 file changed, 9 insertions(+), 1 deletion(-)", "diff": "diff --git a/target/riscv/csr.c b/target/riscv/csr.c\nindex 7948188356..d322bdbd47 100644\n--- a/target/riscv/csr.c\n+++ b/target/riscv/csr.c\n@@ -3326,7 +3326,15 @@ static RISCVException write_henvcfg(CPURISCVState *env, int csrno,\n }\n }\n \n- env->henvcfg = val & mask;\n+ if (riscv_cpu_mxl(env) == MXL_RV32) {\n+ /*\n+ * RV32 stores STCE/ADUE/PBMTE/DTE in henvcfgh, so a low-half henvcfg\n+ * write must not clobber the upper 32 bits.\n+ */\n+ env->henvcfg = (env->henvcfg & ~0xFFFFFFFFULL) | (val & mask);\n+ } else {\n+ env->henvcfg = val & mask;\n+ }\n if ((env->henvcfg & HENVCFG_DTE) == 0) {\n env->vsstatus &= ~MSTATUS_SDT;\n }\n", "prefixes": [ "1/2" ] }