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GET /api/patches/2215419/?format=api
{ "id": 2215419, "url": "http://patchwork.ozlabs.org/api/patches/2215419/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324151323.74473-3-mohamed@unpredictable.fr/", "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": "<20260324151323.74473-3-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-03-24T15:13:13", "name": "[v3,02/12] whpx: i386: enable exceptions VM exit only when needed", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "952168e810f82d36b1afe2623fd97f1c6440e64c", "submitter": { "id": 91318, "url": "http://patchwork.ozlabs.org/api/people/91318/?format=api", "name": "Mohamed Mediouni", "email": "mohamed@unpredictable.fr" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324151323.74473-3-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 497303, "url": "http://patchwork.ozlabs.org/api/series/497303/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497303", "date": "2026-03-24T15:13:13", "name": "whpx: i386: Windows 10 and performance fixes", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497303/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215419/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215419/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=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=U2NJbg7y;\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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Tue, 24 Mar 2026 11:14:36 -0400", "from outbound.st.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-east-1a-60-percent-7 (Postfix) with ESMTPS id\n 067C6180312E; Tue, 24 Mar 2026 15:14:21 +0000 (UTC)", "from localhost.localdomain (unknown [17.42.251.67])\n by p00-icloudmta-asmtp-us-east-1a-60-percent-7 (Postfix) with ESMTPSA id\n 137791835339; Tue, 24 Mar 2026 15:13:40 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1774365264; x=1776957264;\n bh=z2ljL8wNGZuOd0h+jeGsCuyzoynr3r/rNkBTVv1fgB0=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=U2NJbg7yaMTifGpiEy9VkReb2hW8RTckA7AYBym+hgED9wwgOUoyTROwYsYRYYys774RyPN+B6pzqnZoQlm7tDTmGgFOeiFajMc8x5f6pvq6LgtxUwMeMswHe5V1HkvNrwBUTo9Ia0rm5jVcYlV7ympmZkn3A/F8mFYNOof18JDsiLus7wSKPNio2wRdHlCfoq7DKSxIrSdu1VFJF41eEQfghJI943rUBA7iCW5lK2AnrFl6cZsewQdKNvLrwxjHZXBMhm6x4KriTVHEm9lTvQQyrIgb5/c9rx0yoyxTCs3faMnM2ZapLQvgnu7kaMFDWconZZ0lx7E/YSJ+sMbtaQ==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Roman Bolshakov <rbolshakov@ddn.com>,\n Mohamed Mediouni <mohamed@unpredictable.fr>, Wei Liu <wei.liu@kernel.org>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Pedro Barbuda <pbarbuda@microsoft.com>", "Subject": "[PATCH v3 02/12] whpx: i386: enable exceptions VM exit only when\n needed", "Date": "Tue, 24 Mar 2026 16:13:13 +0100", "Message-ID": "<20260324151323.74473-3-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260324151323.74473-1-mohamed@unpredictable.fr>", "References": "<20260324151323.74473-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-ORIG-GUID": "UfoLyG63GY8L_1exhujuUVY1-pankLNB", "X-Authority-Info-Out": "v=2.4 cv=aJX9aL9m c=1 sm=1 tr=0 ts=69c2aa4e\n cx=c_apl:c_pps:t_out a=YrL12D//S6tul8v/L+6tKg==:117\n a=YrL12D//S6tul8v/L+6tKg==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=EmEGBKFVNSqW8m1RzRwA:9", "X-Proofpoint-GUID": "UfoLyG63GY8L_1exhujuUVY1-pankLNB", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzI0MDExOSBTYWx0ZWRfX8rIlCKm9wJc9\n 6Sdx1/Hm/Ta2l+cK401QBOaJArCIIxn/4dCdfWJvLTKAIA4GlVQF3NEFMr1ShSRVLnimkGONrZm\n 2nnuA/hdD0hkuU7jgkks8Htv8RODmCxgwwIL1p3aFa34l6+mP5zmn1h6oa5ZSOeE94CXEsp6WLz\n LyWdoT2Ewd0b1N3G2JEIJ+jthdly11M1Asmpl7sUKFFQFzFaJxR0b6Gdcm+WIkezoHsVJ0eRrFs\n HcS68piFQB44JyGRsnhiivMxJ8oh9iD4J+5rc46IzLjmFfIVqfrRUyQrs/Zgj0fMiDnAt/V6o+S\n haa4HXBg4FtIeGROiNxPRdjsGgdCr5jXO726913Y5TSl/M2XbSVsRnZrbY6AU0=", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-03-24_03,2026-03-23_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0 spamscore=0\n suspectscore=0 adultscore=0 bulkscore=0 mlxlogscore=932 phishscore=0\n malwarescore=0 lowpriorityscore=0 mlxscore=0 clxscore=1030 classifier=spam\n authscore=0 adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2603240119", "Received-SPF": "pass client-ip=57.103.76.224;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.st.icloud.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,\n RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, 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 exceptions VM exit was enabled with an empty bitmask\neven when not used.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/whpx/whpx-all.c | 23 ++++++++++++++++++++---\n 1 file changed, 20 insertions(+), 3 deletions(-)", "diff": "diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex 015c0f1dc9..8f1835ee95 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -903,13 +903,31 @@ static void whpx_init_emu(void)\n HRESULT whpx_set_exception_exit_bitmap(UINT64 exceptions)\n {\n struct whpx_state *whpx = &whpx_global;\n- WHV_PARTITION_PROPERTY prop = { 0, };\n+ WHV_PARTITION_PROPERTY prop;\n HRESULT hr;\n \n if (exceptions == whpx->exception_exit_bitmap) {\n return S_OK;\n }\n \n+ /* Register for MSR and CPUID exits */\n+ memset(&prop, 0, sizeof(WHV_PARTITION_PROPERTY));\n+ prop.ExtendedVmExits.X64MsrExit = 1;\n+ if (exceptions != 0) {\n+ prop.ExtendedVmExits.ExceptionExit = 1;\n+ }\n+\n+ hr = whp_dispatch.WHvSetPartitionProperty(\n+ whpx->partition,\n+ WHvPartitionPropertyCodeExtendedVmExits,\n+ &prop,\n+ sizeof(WHV_PARTITION_PROPERTY));\n+ if (FAILED(hr)) {\n+ error_report(\"WHPX: Failed to enable extended VM exits, hr=%08lx\", hr);\n+ return hr;\n+ }\n+\n+ memset(&prop, 0, sizeof(WHV_PARTITION_PROPERTY));\n prop.ExceptionExitBitmap = exceptions;\n \n hr = whp_dispatch.WHvSetPartitionProperty(\n@@ -2167,7 +2185,6 @@ int whpx_accel_init(AccelState *as, MachineState *ms)\n /* Register for MSR and CPUID exits */\n memset(&prop, 0, sizeof(WHV_PARTITION_PROPERTY));\n prop.ExtendedVmExits.X64MsrExit = 1;\n- prop.ExtendedVmExits.ExceptionExit = 1;\n \n hr = whp_dispatch.WHvSetPartitionProperty(\n whpx->partition,\n@@ -2175,7 +2192,7 @@ int whpx_accel_init(AccelState *as, MachineState *ms)\n &prop,\n sizeof(WHV_PARTITION_PROPERTY));\n if (FAILED(hr)) {\n- error_report(\"WHPX: Failed to enable MSR & CPUIDexit, hr=%08lx\", hr);\n+ error_report(\"WHPX: Failed to enable extended VM exits, hr=%08lx\", hr);\n ret = -EINVAL;\n goto error;\n }\n", "prefixes": [ "v3", "02/12" ] }