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GET /api/patches/2215430/?format=api
{ "id": 2215430, "url": "http://patchwork.ozlabs.org/api/patches/2215430/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324151323.74473-13-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": "<20260324151323.74473-13-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-03-24T15:13:23", "name": "[v3,12/12] whpx: i386: fast runtime state reads", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "99d2735d9405552e1a7d9af607c891556520e494", "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/20260324151323.74473-13-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/2215430/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215430/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=dnuuG0Yo;\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 4fgDCY2KhKz1xy1\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 25 Mar 2026 02:16:41 +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 1w53U7-0007It-8Z; Tue, 24 Mar 2026 11:15:59 -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 1w53T1-0005vS-0B\n for qemu-devel@nongnu.org; Tue, 24 Mar 2026 11:14:57 -0400", "from p-east2-cluster2-host9-snip4-3.eps.apple.com ([57.103.78.66]\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 1w53Su-0005ug-Ol\n for qemu-devel@nongnu.org; Tue, 24 Mar 2026 11:14:50 -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 5BE121816450; Tue, 24 Mar 2026 15:14:40 +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 0F36C1814D00; Tue, 24 Mar 2026 15:13:57 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1774365283; x=1776957283;\n bh=zQcPeomdXccfH+MbZAPd430h2qraXqNbsqETIXZDarE=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=dnuuG0YoKT07W9X6t0y9Uq9f2JjW7+OHA6N2p9QcfNxzBUCBE7SkOIzNoKQQpe5EF9lUuEiwAwfB9RuM+CziZm9nmHTiCcAgoSiTE8TSUYP8xDhC8NkcTLy9jHAvyjWxVDiK1T3/o8n1DBj5idQa60C9kmjiaTcW/MfPSGxlPFhEbjYc3LYA3G6PPx/FIA3PjOXV2kCuCQCG1BX5slr4P9UCi8NbqJ846s3HOR5B3bAXUCX6VlhgVLCFLTs9hfrqo/Ngw8Wx4o1JYhNsDft4u9ld+z6umbUo9s6eaFrXvU1Z5E3BMZ+4VEqZuZHYywlCXPZJ8C8imewq9Uxe6UE7IQ==", "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 12/12] whpx: i386: fast runtime state reads", "Date": "Tue, 24 Mar 2026 16:13:23 +0100", "Message-ID": "<20260324151323.74473-13-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-Authority-Info-Out": "v=2.4 cv=AobjHe9P c=1 sm=1 tr=0 ts=69c2aa61\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=WK8LibQvd4XDxIxmQ_8A:9", "X-Proofpoint-GUID": "Oejcy40_NUbP154VkmSDFSXO-xZFPkw4", "X-Proofpoint-ORIG-GUID": "Oejcy40_NUbP154VkmSDFSXO-xZFPkw4", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzI0MDExOSBTYWx0ZWRfX0Mt18A5WgCh/\n a88coKuXK4Wpb2/XyZRbCR9rHkw3fl4g7Sfn5h2gWvJDgvvCTM0/BrdNNXigtGm5tGMaP5TQN4h\n iV1nmSV4rsefAy4ohYzC8seUyDkQwqDhXCMRYRLyLrKwgSLB4lkBcD+256BfLD02h4u2HBtQO4B\n M/rYace51fXvNHS1ZDqtgZDhbGYdURL+y7HkSbCsQpki1XitZPGVmrb2VtELZvCxUL6ZANNr3HG\n 8o3O9RG+lU84Meb+OZWicp+OE8w89izP8abiIGdQouacbhWLuemqODGWMQqXNjczWjtV0no0fKj\n WMC7JxGbTLLagbR+Em1DpeQVLYhGpm17U85AXXAvsf47M64PE3eX8OOG/FFJQQ=", "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 clxscore=1030\n bulkscore=0 phishscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0\n mlxlogscore=790 malwarescore=0 suspectscore=0 adultscore=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=57.103.78.66;\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": "Now that there's an on-demand interface for fetching CRs\nand segments, only query GPRs and query everything else\non-demand for vmexits.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/whpx/whpx-all.c | 77 +++++++++++++++++++++++++++++++++----\n 1 file changed, 70 insertions(+), 7 deletions(-)", "diff": "diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex 6f23278642..acae61e089 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -156,6 +156,26 @@ static const WHV_REGISTER_NAME whpx_register_names[] = {\n */\n };\n \n+static const WHV_REGISTER_NAME whpx_register_names_for_vmexit[] = {\n+ /* X64 General purpose registers */\n+ WHvX64RegisterRax,\n+ WHvX64RegisterRcx,\n+ WHvX64RegisterRdx,\n+ WHvX64RegisterRbx,\n+ WHvX64RegisterRsp,\n+ WHvX64RegisterRbp,\n+ WHvX64RegisterRsi,\n+ WHvX64RegisterRdi,\n+ WHvX64RegisterR8,\n+ WHvX64RegisterR9,\n+ WHvX64RegisterR10,\n+ WHvX64RegisterR11,\n+ WHvX64RegisterR12,\n+ WHvX64RegisterR13,\n+ WHvX64RegisterR14,\n+ WHvX64RegisterR15,\n+};\n+\n struct whpx_register_set {\n WHV_REGISTER_VALUE values[RTL_NUMBER_OF(whpx_register_names)];\n };\n@@ -593,6 +613,47 @@ static void whpx_get_xcrs(CPUState *cpu)\n cpu_env(cpu)->xcr0 = xcr0.Reg64;\n }\n \n+static void whpx_get_registers_for_vmexit(CPUState *cpu, WHPXStateLevel level)\n+{\n+ struct whpx_state *whpx = &whpx_global;\n+ AccelCPUState *vcpu = cpu->accel;\n+ X86CPU *x86_cpu = X86_CPU(cpu);\n+ CPUX86State *env = &x86_cpu->env;\n+ struct whpx_register_set vcxt;\n+ HRESULT hr;\n+ int idx;\n+ int idx_next;\n+\n+ assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));\n+\n+ hr = whp_dispatch.WHvGetVirtualProcessorRegisters(\n+ whpx->partition, cpu->cpu_index,\n+ whpx_register_names_for_vmexit,\n+ RTL_NUMBER_OF(whpx_register_names_for_vmexit),\n+ &vcxt.values[0]);\n+ if (FAILED(hr)) {\n+ error_report(\"WHPX: Failed to get virtual processor context, hr=%08lx\",\n+ hr);\n+ }\n+\n+ idx = 0;\n+\n+ /* Indexes for first 16 registers match between HV and QEMU definitions */\n+ idx_next = 16;\n+ for (idx = 0; idx < CPU_NB_REGS; idx += 1) {\n+ env->regs[idx] = vcxt.values[idx].Reg64;\n+ }\n+ idx = idx_next;\n+\n+ env->eip = vcpu->exit_ctx.VpContext.Rip;\n+ env->eflags = vcpu->exit_ctx.VpContext.Rflags;\n+ rflags_to_lflags(env);\n+\n+ assert(idx == RTL_NUMBER_OF(whpx_register_names_for_vmexit));\n+\n+ x86_update_hflags(env);\n+}\n+\n void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n {\n struct whpx_state *whpx = &whpx_global;\n@@ -608,7 +669,11 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n \n assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));\n \n- if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && !env->tsc_valid) {\n+ if (level == WHPX_LEVEL_FAST_RUNTIME_STATE) {\n+ return whpx_get_registers_for_vmexit(cpu, level);\n+ }\n+\n+ if (!env->tsc_valid) {\n whpx_get_tsc(cpu);\n env->tsc_valid = !runstate_is_running();\n }\n@@ -623,7 +688,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n hr);\n }\n \n- if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && whpx_irqchip_in_kernel()) {\n+ if (whpx_irqchip_in_kernel()) {\n /*\n * Fetch the TPR value from the emulated APIC. It may get overwritten\n * below with the value from CR8 returned by\n@@ -680,7 +745,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n env->cr[4] = vcxt.values[idx++].Reg64;\n assert(whpx_register_names[idx] == WHvX64RegisterCr8);\n tpr = vcxt.values[idx++].Reg64;\n- if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && tpr != vcpu->tpr) {\n+ if (tpr != vcpu->tpr) {\n vcpu->tpr = tpr;\n cpu_set_apic_tpr(x86_cpu->apic_state, whpx_cr8_to_apic_tpr(tpr));\n }\n@@ -691,9 +756,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n * Extended control registers needs to be handled separately depending\n * on whether xsave is supported/enabled or not.\n */\n- if (level > WHPX_LEVEL_FAST_RUNTIME_STATE) {\n- whpx_get_xcrs(cpu);\n- }\n+ whpx_get_xcrs(cpu);\n \n /* 16 XMM registers */\n assert(whpx_register_names[idx] == WHvX64RegisterXmm0);\n@@ -768,7 +831,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel level)\n \n assert(idx == RTL_NUMBER_OF(whpx_register_names));\n \n- if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && whpx_irqchip_in_kernel()) {\n+ if (whpx_irqchip_in_kernel()) {\n whpx_apic_get(x86_cpu->apic_state);\n }\n \n", "prefixes": [ "v3", "12/12" ] }