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GET /api/patches/2226944/?format=api
{ "id": 2226944, "url": "http://patchwork.ozlabs.org/api/patches/2226944/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422214225.2242-38-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": "<20260422214225.2242-38-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-04-22T21:42:25", "name": "[v3,37/37] whpx: i386: documentation update", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5dbb88ba9ccded35d7f1aa1da873c4d6f8b2d11d", "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/20260422214225.2242-38-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 501116, "url": "http://patchwork.ozlabs.org/api/series/501116/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501116", "date": "2026-04-22T21:41:48", "name": "[v3,01/37] target/i386: emulate: include name of unhandled instruction", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/501116/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226944/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226944/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=XOEMsno3;\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 4g1CW61kyXz1yD5\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 23 Apr 2026 07:47:30 +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 1wFfMO-0000YA-P0; Wed, 22 Apr 2026 17:43:52 -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 <mohamed@unpredictable.fr>)\n id 1wFfMI-0000Ds-DI\n for qemu-devel@nongnu.org; Wed, 22 Apr 2026 17:43:47 -0400", "from p-east2-cluster5-host9-snip4-3.eps.apple.com ([57.103.79.106]\n helo=outbound.st.icloud.com)\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mohamed@unpredictable.fr>)\n id 1wFfMG-0007qX-As\n for qemu-devel@nongnu.org; Wed, 22 Apr 2026 17:43:46 -0400", "from outbound.st.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-east-1a-100-percent-1 (Postfix) with ESMTPS id\n AD5A61800230; Wed, 22 Apr 2026 21:43:39 +0000 (UTC)", "from localhost.localdomain (unknown [17.42.251.67])\n by p00-icloudmta-asmtp-us-east-1a-100-percent-1 (Postfix) with ESMTPSA id\n 0752D18000C7; Wed, 22 Apr 2026 21:43:36 +0000 (UTC)" ], "X-ICL-Out-Info": "\n HUtFAUMHWwJACUgBTUQeDx5WFlZNRAJCTQFIHV8DWRxBAUkdXw9LVxQEFVwFVgZXFHkNXR1FDlYZWgxSD1sOHBZLWFUJCgZdGFgVVgl3HlwASx1XBFQfUxJVHR0LRUtAEwRJAU1fDl4fBBdGGVUERx5dVkAZGQJRHFYNV0NUBF9QSQxBUGxaAEcXSB1dGVlvUF0cDhhZG0AVXRFQGVYJXhUXHkFNWgJWTQVKA18BWwZCC0oCWQVZB14LSgdfGlgKXVQXWwxaDlYwTBZDH1IPWxNNGVEBUkVUAgdYRxRHDg8TTAtHAlo0Vh9UGVoD", "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1776894223; x=1779486223;\n bh=v+52HVYpW3INL47PWIYPp5HJAsIPBwIJXcoInsCco2s=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=XOEMsno30+UadhseLMaCSNHJN6nm+lMKkFKF5wJgRE8e7PLB6HRWyWQye/Pw/YhdQf3hop4on2TIYn4WpN0Khb/IyTWklTIxMMbfpDHewDO2K3V8eHCpGlywwd6XlyjOLfpgh7t+cUJpZOc9Y7HrwVqVnZCQmy7TLD12JhQiJKHzlva07K9p8vWJIi23rEXd/eyKqKPDY6hIfBfELTQXOlFJWJCV4NGX87JQOFkiCX3evS1nlc+4SmnALDdFfHbzdhftgajqUeeLop1vJt8p8L1Vc/LVcFT89fqxCpGj/ewEouwGL1F3ukCRxiPXAot77oT3TdrPKcj8KAA5+W1mIw==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Pedro Barbuda <pbarbuda@microsoft.com>, qemu-arm@nongnu.org,\n Pierrick Bouvier <pierrick.bouvier@linaro.org>,\n Mohamed Mediouni <mohamed@unpredictable.fr>,\n Roman Bolshakov <rbolshakov@ddn.com>,\n \"Michael S. Tsirkin\" <mst@redhat.com>, Wei Liu <wei.liu@kernel.org>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Peter Maydell <peter.maydell@linaro.org>, Zhao Liu <zhao1.liu@intel.com>,\n Paolo Bonzini <pbonzini@redhat.com>", "Subject": "[PATCH v3 37/37] whpx: i386: documentation update", "Date": "Wed, 22 Apr 2026 23:42:25 +0200", "Message-ID": "<20260422214225.2242-38-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260422214225.2242-1-mohamed@unpredictable.fr>", "References": "<20260422214225.2242-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Authority-Info-Out": "v=2.4 cv=c92mgB9l c=1 sm=1 tr=0 ts=69e9410d\n cx=c_apl:c_pps:t_out a=YrL12D//S6tul8v/L+6tKg==:117\n a=YrL12D//S6tul8v/L+6tKg==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=ktjdnHLW_yDM15NnqX0A:9", "X-Proofpoint-GUID": "h1_NzvU4zbmdvpYXRrvfGPpUCTNM7nO9", "X-Proofpoint-ORIG-GUID": "h1_NzvU4zbmdvpYXRrvfGPpUCTNM7nO9", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIyMDIxMiBTYWx0ZWRfXzz5wZ0F/EjOv\n R5iV3DeWWu5n3MbRQm3DxOmPWBc0uqDnohJejrLnkcPQkvykSThIR5kbY0/HH09pbsNDeoEx1yv\n 7dnl5DuicAvtXF1qbxNwbT0DtC/bL/CyDpR7Y2cCMsqZNn6kTNh7nefJ0nwz3EQGYJ7d2X+FjJh\n jlu8dwAZXmh/hIrAyhQdsXmWAukJFRhqVnvca8ZK6/UQp8+OYKDooo7F2eADJPIWk4tlAU3u5j3\n TyYnx3WE/egoZzlKU6423mn6OPGR4R/Zez94EJV+tK7tIqbLNg90P3uAuREpUYbWa9U25Rhh2Qw\n iZUBu6pIks97PncjwCbs00ChuUfcTITYgk3NB3cCCc4qJCcRqdTWsSQiTfTCMk=", "Received-SPF": "pass client-ip=57.103.79.106;\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 SPF_HELO_PASS=-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": "Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n docs/system/whpx.rst | 40 +++++++++++-----------------------------\n 1 file changed, 11 insertions(+), 29 deletions(-)", "diff": "diff --git a/docs/system/whpx.rst b/docs/system/whpx.rst\nindex 3e1979028c..9909e86831 100644\n--- a/docs/system/whpx.rst\n+++ b/docs/system/whpx.rst\n@@ -63,7 +63,7 @@ additional functionality compared to ``-device ramfb``, but is\n incompatible with Windows's UEFI GOP implementation, which\n expects a linear framebuffer to be available.\n \n-Some tracing options\n+Accelerator options\n --------------------\n \n x86_64\n@@ -75,6 +75,11 @@ to undocumented MSRs.\n ``-d invalid_mem`` allows to trace accesses to unmapped\n GPAs.\n \n+``-accel whpx,ssd=off`` disables the separate security domain feature,\n+as in a BTB flush when entering/exiting the guest. This results in a\n+significant MMIO performance increase at the detriment of security\n+mitigations.\n+\n Known issues on x86_64\n ----------------------\n \n@@ -96,45 +101,22 @@ MMX, SSE or AVX instructions for access to MMIO memory ranges.\n Attempts to run such guests will result in an ``Unimplemented handler``\n warning for MMX and a failure to decode for newer instructions.\n \n-``-M isapc``\n-^^^^^^^^^^^^\n-\n-``-M isapc`` doesn't disable the Hyper-V LAPIC on its own yet. To\n-be able to use that machine, use ``-accel whpx,hyperv=off,kernel-irqchip=off``.\n-\n-However, in QEMU 11.0, the guest will still be a 64-bit x86\n-ISA machine with all the corresponding CPUID leaves exposed.\n-\n-gdbstub\n-^^^^^^^\n-\n-As save/restore of xsave state is not currently present, state\n-exposed through GDB will be incomplete.\n-\n-The same also applies to ``info registers``.\n-\n-``-cpu type`` ignored\n-^^^^^^^^^^^^^^^^^^^^^\n-\n-In this release, -cpu is an ignored argument. \n-\n PIC interrupts on Windows 10\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n \n On Windows 10, a legacy PIC interrupt injected does not wake the guest\n from an HLT when using the Hyper-V provided interrupt controller.\n \n-This has been addressed in QEMU 11.0 on Windows 11 platforms but\n-functionality to make it available on Windows 10 isn't present.\n+As such, on Windows 10, using the Hyper-V interrupt controller is\n+disabled by default. You can enable it via ``-M q35,pic=off`` which\n+disables the PIC. In that configuration, using a UEFI is recommended.\n \n-Workaround: for affected use cases, use ``-M kernel-irqchip=off``.\n+On this release, ``-M kernel-irqchip=`` is not expected to be manually\n+set during normal operation. It remains as a debugging option.\n \n Known issues on Windows 11\n ^^^^^^^^^^^^^^^^^^^^^^^^^^\n \n-Nested virtualisation-specific Hyper-V enlightenments are not\n-currently exposed.\n-\n arm64\n -----\n \n", "prefixes": [ "v3", "37/37" ] }