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GET /api/patches/2215421/?format=api
{ "id": 2215421, "url": "http://patchwork.ozlabs.org/api/patches/2215421/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324151323.74473-7-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": "<20260324151323.74473-7-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-03-24T15:13:17", "name": "[v3,06/12] target/i386: emulate: add new callbacks", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "880dfc2b847f648704287d86c595f8d094d8b8af", "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/20260324151323.74473-7-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/2215421/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215421/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=BBpOFmIY;\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=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.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 4fgDBF0RZ5z1xy1\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 25 Mar 2026 02:15:33 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1w53TN-000692-Sk; Tue, 24 Mar 2026 11:15:15 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.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 1w53Sq-0005t8-Be\n for qemu-devel@nongnu.org; Tue, 24 Mar 2026 11:14:42 -0400", "from p-east2-cluster2-host11-snip4-2.eps.apple.com ([57.103.78.85]\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 1w53Sn-0005sv-9V\n for qemu-devel@nongnu.org; Tue, 24 Mar 2026 11:14:38 -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 59FC21852A0D; Tue, 24 Mar 2026 15:14:29 +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 9108A1803125; Tue, 24 Mar 2026 15:13:47 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1774365271; x=1776957271;\n bh=NZnj8yCbumSadExeNcgwgqV2muxnORrhx0HseCqyro8=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=BBpOFmIY9jOYCzKbBcK1KyUjsIoJEJHw/OgAM6Q9abqceGxy7fcM2jHyC4rPym6T0ji/nBTh/bwL/cJYjMpgW7JzEa2p9u1oYAEhIUfO44LaJ8nMmNdBO8a7vId2++Nrb84B6HtQ2aaUuS6XSEKGJm6lR9rsEQaMnxidpSEdKBYZvJWzAH9TCsDMRxfi1JMDyHmg903FrF0h52axph7vB3QTAfvkKIGc+fpnVkKB66ZraIuJ5z4KriMOPcmtYt30haNbpoBro4Z9Wtt2g+xr41eZkGLgODkGYP7fSXKHmsOnVTidI/0rPgZan8L2Hcug8ThwomfAPx0sCvvmtegzVQ==", "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 06/12] target/i386: emulate: add new callbacks", "Date": "Tue, 24 Mar 2026 16:13:17 +0100", "Message-ID": "<20260324151323.74473-7-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-Spam-Details-Enc": "AW1haW4tMjYwMzI0MDExOSBTYWx0ZWRfX0Kqrv/S6y25A\n /pFs/V/O59/4uuAXWYhmX6+XFR1iyjkJPstm3gkE9PaqARVKCFt332uNJV1ahm3oOuIUoqtTfIw\n Ohiy5zrhTWYvHFF2yHgWsbqJ9E3Fx7IDOjW8PTybXL3WJ7U0RBetZkUdY+0/WL/QFeqFuiZ7TLk\n 2nwsttObXaZUFfBGXHckw4rn6SGGzvrgYEub1T3P/HyO99bYf799ozoTnWNO+D0r+WggQ5fbF2o\n 9fiF6ER3ltpA0oJLgpNUD037FqxcnG3C/yznBhV6gL5qjjvbBfjgJqYQvDBPCwDGSAwbNcbBTIp\n cd22jRR7Qmv0B6pNVeFUQbI/syVRM5gTcidZQcBa7OA98g9ICSkmctuF3+bm0w=", "X-Proofpoint-GUID": "imozCZEi2w2nkECidPf5DWTvyx7xNeJQ", "X-Authority-Info-Out": "v=2.4 cv=H/rWAuYi c=1 sm=1 tr=0 ts=69c2aa55\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=AM0uniIKGEjy2BpxYl4A:9", "X-Proofpoint-ORIG-GUID": "imozCZEi2w2nkECidPf5DWTvyx7xNeJQ", "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 malwarescore=0\n spamscore=0 phishscore=0 adultscore=0\n lowpriorityscore=0 clxscore=1030\n mlxlogscore=884 bulkscore=0 mlxscore=0 suspectscore=0 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=57.103.78.85;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.st.icloud.com", "X-Spam_score_int": "-27", "X-Spam_score": "-2.8", "X-Spam_bar": "--", "X-Spam_report": "(-2.8 / 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 RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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": "On Hyper-V fetching some guest registers is really expensive, so\nadd a way to query some state from information provided by Hyper-V\nto save time on vmexits.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/emulate/x86_emu.h | 3 +++\n target/i386/emulate/x86_helpers.c | 6 ++++++\n target/i386/emulate/x86_mmu.c | 3 +++\n 3 files changed, 12 insertions(+)", "diff": "diff --git a/target/i386/emulate/x86_emu.h b/target/i386/emulate/x86_emu.h\nindex 0f284b0c3d..4ed970bd53 100644\n--- a/target/i386/emulate/x86_emu.h\n+++ b/target/i386/emulate/x86_emu.h\n@@ -32,6 +32,9 @@ struct x86_emul_ops {\n int size, int count);\n void (*simulate_rdmsr)(CPUState *cs);\n void (*simulate_wrmsr)(CPUState *cs);\n+ bool (*is_protected_mode)(CPUState *cpu);\n+ bool (*is_long_mode)(CPUState *cpu);\n+ bool (*is_user_mode)(CPUState *cpu);\n };\n \n extern const struct x86_emul_ops *emul_ops;\ndiff --git a/target/i386/emulate/x86_helpers.c b/target/i386/emulate/x86_helpers.c\nindex 024f9a2afc..ebbf40f2b0 100644\n--- a/target/i386/emulate/x86_helpers.c\n+++ b/target/i386/emulate/x86_helpers.c\n@@ -211,6 +211,9 @@ bool x86_is_protected(CPUState *cpu)\n X86CPU *x86_cpu = X86_CPU(cpu);\n CPUX86State *env = &x86_cpu->env;\n uint64_t cr0 = env->cr[0];\n+ if (emul_ops->is_protected_mode) {\n+ return emul_ops->is_protected_mode(cpu);\n+ }\n \n return cr0 & CR0_PE_MASK;\n }\n@@ -234,6 +237,9 @@ bool x86_is_long_mode(CPUState *cpu)\n uint64_t efer = env->efer;\n uint64_t lme_lma = (MSR_EFER_LME | MSR_EFER_LMA);\n \n+ if (emul_ops->is_long_mode) {\n+ return emul_ops->is_long_mode(cpu);\n+ }\n return ((efer & lme_lma) == lme_lma);\n }\n \ndiff --git a/target/i386/emulate/x86_mmu.c b/target/i386/emulate/x86_mmu.c\nindex 4e39bae025..670939acdb 100644\n--- a/target/i386/emulate/x86_mmu.c\n+++ b/target/i386/emulate/x86_mmu.c\n@@ -49,6 +49,9 @@\n \n static bool is_user(CPUState *cpu)\n {\n+ if (emul_ops->is_user_mode) {\n+ return emul_ops->is_user_mode(cpu);\n+ }\n return false;\n }\n \n", "prefixes": [ "v3", "06/12" ] }