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GET /api/patches/2230872/?format=api
{ "id": 2230872, "url": "http://patchwork.ozlabs.org/api/patches/2230872/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430071315.354333-12-zhenzhong.duan@intel.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260430071315.354333-12-zhenzhong.duan@intel.com>", "list_archive_url": null, "date": "2026-04-30T07:13:07", "name": "[v4,11/15] intel_iommu_accel: Bypass PASID entry addition for just deleted entry", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "52b8ffb3cb582dcf429e5b9fce0a9e36c6da0f71", "submitter": { "id": 81636, "url": "http://patchwork.ozlabs.org/api/people/81636/?format=api", "name": "Duan, Zhenzhong", "email": "zhenzhong.duan@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430071315.354333-12-zhenzhong.duan@intel.com/mbox/", "series": [ { "id": 502222, "url": "http://patchwork.ozlabs.org/api/series/502222/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502222", "date": "2026-04-30T07:12:57", "name": "intel_iommu: Enable PASID support for passthrough device", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/502222/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230872/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230872/checks/", "tags": {}, "related": [], "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=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=biQgmrii;\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=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.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 4g5lmg3FSMz1yHv\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 30 Apr 2026 17:14:59 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wILbc-0005hZ-5Q; Thu, 30 Apr 2026 03:14:40 -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 <zhenzhong.duan@intel.com>)\n id 1wILbH-0005IH-5G\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 03:14:21 -0400", "from mgamail.intel.com ([192.198.163.13])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <zhenzhong.duan@intel.com>)\n id 1wILbC-0008QN-VO\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 03:14:18 -0400", "from orviesa007.jf.intel.com ([10.64.159.147])\n by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 30 Apr 2026 00:14:12 -0700", "from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229])\n by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 30 Apr 2026 00:14:09 -0700" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1777533255; x=1809069255;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=mfXdfQl9POujA0hQEorAHvjyvPh51rTk6rz0RNAFMBU=;\n b=biQgmriitbaYgvgwJy8C+io4W6xxiGYbEJx+mDILqgjZnWxQymWUkQMK\n Comku6ge3pMu4ywIe5WHS+AX4T8gxAeKBxghT95nDDG7/MyiEGPeh4Ruw\n gwHf7dCYcsitDzD9A7ypjhIMv6u6VWIRKtJeBpqmnLOgrdp+eYo0pH2SS\n ZAR4XCFvpI/ddPtyrzO7JDnKEz18yDycJhH7ZLfSSqpvrmtUXVDnDLp36\n wnU3smlaLs5Yd7MJamW0tCisVtpY9lKdzMvdxLbb/u5g2EeRGXbAF6TT3\n GD3s/TEmD656jCSCbbamDN6pY+k7nKYwk6aqlt1UAfQEiL9INsxGN7o4P w==;", "X-CSE-ConnectionGUID": [ "9NP0EAuBRFicbqiExQRONQ==", "D+c42W4HT7+HE/5GK4vmhA==" ], "X-CSE-MsgGUID": [ "I7beH8trSPCL8++196mvJA==", "KN9Y9UW1TPGJRVkJCTGcJg==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11771\"; a=\"81051654\"", "E=Sophos;i=\"6.23,207,1770624000\"; d=\"scan'208\";a=\"81051654\"", "E=Sophos;i=\"6.23,207,1770624000\"; d=\"scan'208\";a=\"234771564\"" ], "X-ExtLoop1": "1", "From": "Zhenzhong Duan <zhenzhong.duan@intel.com>", "To": "qemu-devel@nongnu.org", "Cc": "alex@shazbot.org, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com,\n jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com,\n skolothumtho@nvidia.com, joao.m.martins@oracle.com,\n clement.mathieu--drif@bull.com, kevin.tian@intel.com, yi.l.liu@intel.com,\n xudong.hao@intel.com, Zhenzhong Duan <zhenzhong.duan@intel.com>", "Subject": "[PATCH v4 11/15] intel_iommu_accel: Bypass PASID entry addition for\n just deleted entry", "Date": "Thu, 30 Apr 2026 03:13:07 -0400", "Message-ID": "<20260430071315.354333-12-zhenzhong.duan@intel.com>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260430071315.354333-1-zhenzhong.duan@intel.com>", "References": "<20260430071315.354333-1-zhenzhong.duan@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=192.198.163.13;\n envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com", "X-Spam_score_int": "-43", "X-Spam_score": "-4.4", "X-Spam_bar": "----", "X-Spam_report": "(-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_MED=-2.3, 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": "For VTD_INV_DESC_PASIDC_G_PASID_SI typed pc_inv_dsc invalidation, if an\npasid entry is just removed, it can never be a new entry to add. So\ncalling vtd_replay_pasid_bind_for_dev() is unnecessary.\n\nIntroduce a new field accel_pce_deleted in VTDPASIDCacheInfo to mark\nthis case and to do the bypassing.\n\nSuggested-by: Yi Liu <yi.l.liu@intel.com>\nSigned-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>\nTested-by: Xudong Hao <xudong.hao@intel.com>\n---\n hw/i386/intel_iommu_internal.h | 1 +\n hw/i386/intel_iommu_accel.c | 16 +++++++++++++---\n 2 files changed, 14 insertions(+), 3 deletions(-)", "diff": "diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h\nindex 623dc24760..2c716c5297 100644\n--- a/hw/i386/intel_iommu_internal.h\n+++ b/hw/i386/intel_iommu_internal.h\n@@ -630,6 +630,7 @@ typedef struct VTDPASIDCacheInfo {\n uint8_t type;\n uint16_t did;\n uint32_t pasid;\n+ bool accel_pce_deleted;\n } VTDPASIDCacheInfo;\n \n typedef struct VTDPIOTLBInvInfo {\ndiff --git a/hw/i386/intel_iommu_accel.c b/hw/i386/intel_iommu_accel.c\nindex b951d90135..457fdcba62 100644\n--- a/hw/i386/intel_iommu_accel.c\n+++ b/hw/i386/intel_iommu_accel.c\n@@ -302,10 +302,15 @@ static void vtd_accel_fill_pc(VTDHostIOMMUDevice *vtd_hiod, uint32_t pasid,\n QLIST_INSERT_HEAD(&vtd_hiod->pasid_cache_list, vtd_pce, next);\n }\n \n-static void vtd_accel_delete_pc(VTDAccelPASIDCacheEntry *vtd_pce)\n+static void vtd_accel_delete_pc(VTDAccelPASIDCacheEntry *vtd_pce,\n+ VTDPASIDCacheInfo *pc_info)\n {\n QLIST_REMOVE(vtd_pce, next);\n g_free(vtd_pce);\n+\n+ if (pc_info->type == VTD_INV_DESC_PASIDC_G_PASID_SI) {\n+ pc_info->accel_pce_deleted = true;\n+ }\n }\n \n static void\n@@ -339,7 +344,7 @@ vtd_accel_pasid_cache_invalidate_one(VTDAccelPASIDCacheEntry *vtd_pce,\n * to be either all-zero or non-present. Either case means existing\n * pasid cache should be invalidated.\n */\n- vtd_accel_delete_pc(vtd_pce);\n+ vtd_accel_delete_pc(vtd_pce, pc_info);\n }\n }\n \n@@ -502,7 +507,12 @@ void vtd_accel_pasid_cache_sync(IntelIOMMUState *s, VTDPASIDCacheInfo *pc_info)\n * removed.\n */\n vtd_accel_pasid_cache_invalidate(vtd_hiod, pc_info);\n- vtd_accel_replay_pasid_bind_for_dev(vtd_hiod, start, end, pc_info);\n+\n+ if (pc_info->accel_pce_deleted) {\n+ pc_info->accel_pce_deleted = false;\n+ } else {\n+ vtd_accel_replay_pasid_bind_for_dev(vtd_hiod, start, end, pc_info);\n+ }\n }\n }\n \n", "prefixes": [ "v4", "11/15" ] }