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GET /api/1.1/patches/2230025/?format=api
{ "id": 2230025, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230025/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429044752.4176397-27-alistair.francis@wdc.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": "<20260429044752.4176397-27-alistair.francis@wdc.com>", "date": "2026-04-29T04:47:27", "name": "[PULL,26/51] target/riscv: preserve RV32 henvcfgh on henvcfg writes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b7ab9ecb9287179db25e7d2137254880e850daf0", "submitter": { "id": 64571, "url": "http://patchwork.ozlabs.org/api/1.1/people/64571/?format=api", "name": "Alistair Francis", "email": "alistair23@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429044752.4176397-27-alistair.francis@wdc.com/mbox/", "series": [ { "id": 501983, "url": "http://patchwork.ozlabs.org/api/1.1/series/501983/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501983", "date": "2026-04-29T04:47:05", "name": "[PULL,01/51] hw/riscv/riscv-iommu: Use standard EN_PRI bit for PRI", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501983/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230025/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230025/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=Bb22FATZ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-pl1-x636.google.com", "X-Spam_score_int": "-17", "X-Spam_score": "-1.8", "X-Spam_bar": "-", "X-Spam_report": "(-1.8 / 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,\n FREEMAIL_ENVFROM_END_DIGIT=0.25, 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-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": "From: Bruno Sa <bruno.vilaca.sa@gmail.com>\n\nOn 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>\nReviewed-by: Alistair Francis <alistair.francis@wdc.com>\nMessage-ID: <20260409155344.2849233-2-bruno.vilaca.sa@gmail.com>\nSigned-off-by: Alistair Francis <alistair.francis@wdc.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 a75281539b..cfd076b368 100644\n--- a/target/riscv/csr.c\n+++ b/target/riscv/csr.c\n@@ -3353,7 +3353,15 @@ 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": [ "PULL", "26/51" ] }