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GET /api/1.1/patches/2232520/?format=api
{ "id": 2232520, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2232520/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260504-feat-mte4-v5-13-232a648e63c6@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": "<20260504-feat-mte4-v5-13-232a648e63c6@gmail.com>", "date": "2026-05-04T15:50:46", "name": "[v5,13/15] docs: add MTE4 features to docs", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "1f5aea2804e051e367b605c6d0426b7884f3de0b", "submitter": { "id": 91863, "url": "http://patchwork.ozlabs.org/api/1.1/people/91863/?format=api", "name": "Gabriel Brookman", "email": "brookmangabriel@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260504-feat-mte4-v5-13-232a648e63c6@gmail.com/mbox/", "series": [ { "id": 502688, "url": "http://patchwork.ozlabs.org/api/1.1/series/502688/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502688", "date": "2026-05-04T15:50:33", "name": "target/arm: add support for MTE4", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/502688/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2232520/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2232520/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=iFh/o4gC;\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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charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260504-feat-mte4-v5-13-232a648e63c6@gmail.com>", "References": "<20260504-feat-mte4-v5-0-232a648e63c6@gmail.com>", "In-Reply-To": "<20260504-feat-mte4-v5-0-232a648e63c6@gmail.com>", "To": "qemu-devel@nongnu.org", "Cc": "Peter Maydell <peter.maydell@linaro.org>,\n Gustavo Romero <gustavo.romero@linaro.org>,\n Richard Henderson <richard.henderson@linaro.org>, qemu-arm@nongnu.org,\n Laurent Vivier <laurent@vivier.eu>,\n Gabriel Brookman <brookmangabriel@gmail.com>, Helge Deller <deller@gmx.de>,\n Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>,\n Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>", "X-Mailer": "b4 0.15.2", "X-Developer-Signature": "v=1; a=ed25519-sha256; t=1777909867; l=2273;\n i=brookmangabriel@gmail.com; s=20251009; h=from:subject:message-id;\n bh=ztIDgqfeOPD6qpIxmbbcUcgA0mWZp1FYw4KgD7jsfWo=;\n b=6hu7QtbwsuzHsPQ9mzvo7Wcu6EOt3HoS8T9hC/HqJc67/1XOstwfK8gvMRWOMnYYoXcrt+7wS\n PaNhj6S4ro5A1jivBZmouqrVDIbsnL6EMC8C+zUHRITgqLNIKH+dZ27", "X-Developer-Key": "i=brookmangabriel@gmail.com; a=ed25519;\n pk=m9TtPDal6WzoHNnQiHHKf8dTrv3DUCPUUTujuo8vNrw=", "Received-SPF": "pass client-ip=2607:f8b0:4864:20::82c;\n envelope-from=brookmangabriel@gmail.com; helo=mail-qt1-x82c.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=ham 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": "The implemented MTE4 features are now present in\ndocs/system/arm/emulation.rst\n\nSigned-off-by: Gabriel Brookman <brookmangabriel@gmail.com>\nReviewed-by: Richard Henderson <richard.henderson@linaro.org>\n---\n docs/system/arm/emulation.rst | 5 +++++\n target/arm/tcg/cpu64.c | 8 ++++++++\n 2 files changed, 13 insertions(+)", "diff": "diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst\nindex 8cd7fe7b00..c660074ec4 100644\n--- a/docs/system/arm/emulation.rst\n+++ b/docs/system/arm/emulation.rst\n@@ -111,6 +111,11 @@ the following architecture extensions:\n - FEAT_MTE3 (MTE Asymmetric Fault Handling)\n - FEAT_MTE_ASYM_FAULT (Memory tagging asymmetric faults)\n - FEAT_MTE_ASYNC (Asynchronous reporting of Tag Check Fault)\n+- FEAT_MTE_PERM (NoTagAccess memory attribute)\n+- FEAT_MTE_TAGGED_FAR (Full address reporting of Tag Check Fault)\n+- FEAT_MTE_STORE_ONLY (Store-only tag checking)\n+- FEAT_MTE_CANONICAL_TAGS (Canonical tag checking)\n+- FEAT_MTE_NO_ADDRESS_TAGS (Address tagging disabled)\n - FEAT_NMI (Non-maskable Interrupt)\n - FEAT_NV (Nested Virtualization)\n - FEAT_NV2 (Enhanced nested virtualization support)\ndiff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c\nindex 649d854a65..77b8c2a0a9 100644\n--- a/target/arm/tcg/cpu64.c\n+++ b/target/arm/tcg/cpu64.c\n@@ -1291,8 +1291,16 @@ void aarch64_max_tcg_initfn(Object *obj)\n t = FIELD_DP64(t, ID_AA64PFR1, CSV2_FRAC, 0); /* FEAT_CSV2_3 */\n t = FIELD_DP64(t, ID_AA64PFR1, NMI, 1); /* FEAT_NMI */\n t = FIELD_DP64(t, ID_AA64PFR1, GCS, 1); /* FEAT_GCS */\n+ t = FIELD_DP64(t, ID_AA64PFR1,\n+ MTEX, 1); /* FEAT_MTE_NO_ADDRESS_TAGS + FEAT_MTE_CANONICAL_TAGS */\n SET_IDREG(isar, ID_AA64PFR1, t);\n \n+ t = GET_IDREG(isar, ID_AA64PFR2);\n+ t = FIELD_DP64(t, ID_AA64PFR2, MTEFAR, 1); /* FEAT_MTE_TAGGED_FAR */\n+ t = FIELD_DP64(t, ID_AA64PFR2, MTESTOREONLY, 1); /* FEAT_MTE_STORE_ONLY */\n+ t = FIELD_DP64(t, ID_AA64PFR2, MTEPERM, 1); /* FEAT_MTE_PERM */\n+ SET_IDREG(isar, ID_AA64PFR2, t);\n+\n t = GET_IDREG(isar, ID_AA64MMFR0);\n t = FIELD_DP64(t, ID_AA64MMFR0, PARANGE, 6); /* FEAT_LPA: 52 bits */\n t = FIELD_DP64(t, ID_AA64MMFR0, TGRAN16, 1); /* 16k pages supported */\n", "prefixes": [ "v5", "13/15" ] }