From nobody Fri Apr 3 01:26:01 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1774457162; cv=none; d=zohomail.com; s=zohoarc; b=HSMgu7eyhvWPOqpqSwS/YAC/AFEC5f9ikhPwq3GH+j4O6PiI6UY13krw45dZmUCec1rp3DEB+ujTabHjV0SYA/ckV5g1gEXyXwpGDtg+Pw0+eRyAqQ5AaTcUhUxxaafVCTvG1ltcJjfa0cjula8jC/HDG9p764+5GONt82RWkyg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1774457162; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Ta7T0mi+8d9DVcASb2OtQTo0e14u/mzL90h8oJVlsXE=; b=YlpxW8isd0ndQLgxD57ajENm93sOyzRujhYdTmjvIWVEXyexFE2DHB1LK2nuFQD28JY5cyakEfTkkR6akPS30xYh4DcyWC5jClRI5w9oyF2HgiCfw2c4rv09JfsFNAew10RrK8It/RVLlv084Jsiof3velBqGCJ14I1zOtshJrU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1774457162312290.43610446197135; Wed, 25 Mar 2026 09:46:02 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w5RMM-000565-W4; Wed, 25 Mar 2026 12:45:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w5RML-00050m-2N for qemu-devel@nongnu.org; Wed, 25 Mar 2026 12:45:33 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w5RMH-0004g8-1A for qemu-devel@nongnu.org; Wed, 25 Mar 2026 12:45:31 -0400 Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-99-x8it0dRNNW6rF6HlvQfCHg-1; Wed, 25 Mar 2026 12:45:26 -0400 Received: by mail-wr1-f71.google.com with SMTP id ffacd0b85a97d-43b42eee946so1017117f8f.1 for ; Wed, 25 Mar 2026 09:45:26 -0700 (PDT) Received: from [192.168.10.48] ([151.49.85.67]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48711764509sm142682835e9.13.2026.03.25.09.45.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Mar 2026 09:45:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774457128; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ta7T0mi+8d9DVcASb2OtQTo0e14u/mzL90h8oJVlsXE=; b=bIni7stUK+EOdfY7yi7cHhl3eCCgfiQbuDhXs7YbV/1rfD9n+Km28uzQz6Dpj62gU/nq3H wsgUjLUU3rytwCF4suvb4Hq7+4Yll7tlTIqWOThyH56hEiEyqgvTtrjp1uHV55vdomz9ZP XB4RDpLtaniJFDfesHfx4tzilp0BwLU= X-MC-Unique: x8it0dRNNW6rF6HlvQfCHg-1 X-Mimecast-MFC-AGG-ID: x8it0dRNNW6rF6HlvQfCHg_1774457126 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1774457125; x=1775061925; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Ta7T0mi+8d9DVcASb2OtQTo0e14u/mzL90h8oJVlsXE=; b=mfqW6lTQ4UQ0fYOLJnYu9tD0N4XXetRusAD5d18A3YNfIm390unN/70QLVBtUUe4Cq SrgrH8RratF89osCqNk/aJDkc1n6lP90/C+OwPdK+sQI7VjnoxIocXa+NvzuJ1qkwZ70 d/NxPDZsE1Ayq6Iyw/tU9/C6u1P1AVbXbGzoXviUVMTvPFJRkC1CDZuCNTyAKBiO+jQ9 W6BCeoVeaascLMkPA4o8cMdWdXU9VDCuDJ7WYz7Mtsl/jhIoejIpPeeDfObwZExJOZm9 NCQGnk/wcJNnuc6Q0X5dXVU2K9p8DtDOqYLjYpaOFhDMopT6J/BSm2HIuF+aW9LNMVbV 3C5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774457125; x=1775061925; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Ta7T0mi+8d9DVcASb2OtQTo0e14u/mzL90h8oJVlsXE=; b=cCFK8zshpUAsC+kZOUrYZNjDLonl5QQgz0/NvY5i8N6y+OjhOVZQ1QHjXLnzdAyJb/ hg8YUjSgaJrR6M7io+/mim2Nj5OT3DkCgtI6NxOBTZj/x2ob0RfN/U1DZUrTTMr9BOc6 eGbLHRckUwqP+uWOEw4YL14sS9Hwhk9X+1M4xumAAlgElZ7plHQ6QJ7RVYM4ir2gOPzB XX5p0l/81W29JjVGc0CxYrwK+ToKHoXI+DDwPVclLvfNsIUXFQXleYtKUQFxVfv6GkL5 vQ5BYC+fiCd6nUQ5qvb5dKDDI3p/2YMlc2KzFnpl1y84HVQCPOHc3pHFQWLQU31nCDU6 FqNA== X-Gm-Message-State: AOJu0YxUwp/iLE8RfTyHcRez8Q0O+EwQvdZ4XPrIPKqZMP1djDwOFyTK YUVEv1+aAnM2WWhvdTJS9VUDKonkkcVGbdm1se3Ncec/S1c9u5l6xwBC7yd3OI8mmDbvDtRJgLo 9pJr3ZDdBkWzwSiW2wWIQXXkg444ZJo5sDdw26946RFXI1foJyoUxPRBvJvRJl4enx0xTZCqUSJ O7fHiVcKEq9Ih0CMVGhJe9qYcKaPdEd8mSR/60sjd2 X-Gm-Gg: ATEYQzxwYaox9WQeW6P+xsEjPq4fES3SieJ9CeKZ1XURmKsotlSjJ2nppxblIoTkORC 0BmPWMgn36ErnhKm0dqWTMgmKzlWlNS7I6KqhA/tFlC4c5DMN1hq6y9L19eyBuhAa/3fv53QVBC MnaSP+rvqPoYgNg3o/G16zedchuhsydT3D4P77OAGurEtmwyyUxlfBMwjWnaiBQgl1/JFbYoQQt /dif46vj8u6D1KgA71ymNzXA6AC2ScmtePmKK2p50E1haROUUxzNGQIrpv01Aw3ebgnua2W/P0H Ap3h6cyhpYnzzGSDN5bOLkmyAE1m5pmnLxkJXas6VY8Rz2MBRSI3cKzU7Qyc7RV5Wg3zXPfkFi2 B2qo//MC+6rlhvampGgepq/kD/P1cQnCYhPodT0DT8A9cYVVng6nUjG0HdBMYWNvqojev6mPRWj SYul+q7IG5v8e0Mr+5cc7TYslY X-Received: by 2002:a05:600c:8708:b0:486:fe83:861c with SMTP id 5b1f17b1804b1-487160241b4mr59526735e9.7.1774457125085; Wed, 25 Mar 2026 09:45:25 -0700 (PDT) X-Received: by 2002:a05:600c:8708:b0:486:fe83:861c with SMTP id 5b1f17b1804b1-487160241b4mr59526435e9.7.1774457124415; Wed, 25 Mar 2026 09:45:24 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Mohamed Mediouni Subject: [PULL 15/19] whpx: i386: fast runtime state reads Date: Wed, 25 Mar 2026 17:44:49 +0100 Message-ID: <20260325164453.72127-16-pbonzini@redhat.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260325164453.72127-1-pbonzini@redhat.com> References: <20260325164453.72127-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1774457163912154100 Content-Type: text/plain; charset="utf-8" From: Mohamed Mediouni Now that there's an on-demand interface for fetching CRs and segments, only query GPRs and query everything else on-demand for vmexits. Signed-off-by: Mohamed Mediouni Link: https://lore.kernel.org/r/20260324151323.74473-13-mohamed@unpredictab= le.fr Signed-off-by: Paolo Bonzini --- target/i386/whpx/whpx-all.c | 77 +++++++++++++++++++++++++++++++++---- 1 file changed, 70 insertions(+), 7 deletions(-) diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c index 6f232786422..acae61e089d 100644 --- a/target/i386/whpx/whpx-all.c +++ b/target/i386/whpx/whpx-all.c @@ -156,6 +156,26 @@ static const WHV_REGISTER_NAME whpx_register_names[] = =3D { */ }; =20 +static const WHV_REGISTER_NAME whpx_register_names_for_vmexit[] =3D { + /* X64 General purpose registers */ + WHvX64RegisterRax, + WHvX64RegisterRcx, + WHvX64RegisterRdx, + WHvX64RegisterRbx, + WHvX64RegisterRsp, + WHvX64RegisterRbp, + WHvX64RegisterRsi, + WHvX64RegisterRdi, + WHvX64RegisterR8, + WHvX64RegisterR9, + WHvX64RegisterR10, + WHvX64RegisterR11, + WHvX64RegisterR12, + WHvX64RegisterR13, + WHvX64RegisterR14, + WHvX64RegisterR15, +}; + struct whpx_register_set { WHV_REGISTER_VALUE values[RTL_NUMBER_OF(whpx_register_names)]; }; @@ -593,6 +613,47 @@ static void whpx_get_xcrs(CPUState *cpu) cpu_env(cpu)->xcr0 =3D xcr0.Reg64; } =20 +static void whpx_get_registers_for_vmexit(CPUState *cpu, WHPXStateLevel le= vel) +{ + struct whpx_state *whpx =3D &whpx_global; + AccelCPUState *vcpu =3D cpu->accel; + X86CPU *x86_cpu =3D X86_CPU(cpu); + CPUX86State *env =3D &x86_cpu->env; + struct whpx_register_set vcxt; + HRESULT hr; + int idx; + int idx_next; + + assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); + + hr =3D whp_dispatch.WHvGetVirtualProcessorRegisters( + whpx->partition, cpu->cpu_index, + whpx_register_names_for_vmexit, + RTL_NUMBER_OF(whpx_register_names_for_vmexit), + &vcxt.values[0]); + if (FAILED(hr)) { + error_report("WHPX: Failed to get virtual processor context, hr=3D= %08lx", + hr); + } + + idx =3D 0; + + /* Indexes for first 16 registers match between HV and QEMU definition= s */ + idx_next =3D 16; + for (idx =3D 0; idx < CPU_NB_REGS; idx +=3D 1) { + env->regs[idx] =3D vcxt.values[idx].Reg64; + } + idx =3D idx_next; + + env->eip =3D vcpu->exit_ctx.VpContext.Rip; + env->eflags =3D vcpu->exit_ctx.VpContext.Rflags; + rflags_to_lflags(env); + + assert(idx =3D=3D RTL_NUMBER_OF(whpx_register_names_for_vmexit)); + + x86_update_hflags(env); +} + void whpx_get_registers(CPUState *cpu, WHPXStateLevel level) { struct whpx_state *whpx =3D &whpx_global; @@ -608,7 +669,11 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel = level) =20 assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); =20 - if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && !env->tsc_valid) { + if (level =3D=3D WHPX_LEVEL_FAST_RUNTIME_STATE) { + return whpx_get_registers_for_vmexit(cpu, level); + } + + if (!env->tsc_valid) { whpx_get_tsc(cpu); env->tsc_valid =3D !runstate_is_running(); } @@ -623,7 +688,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel l= evel) hr); } =20 - if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && whpx_irqchip_in_kernel())= { + if (whpx_irqchip_in_kernel()) { /* * Fetch the TPR value from the emulated APIC. It may get overwrit= ten * below with the value from CR8 returned by @@ -680,7 +745,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel l= evel) env->cr[4] =3D vcxt.values[idx++].Reg64; assert(whpx_register_names[idx] =3D=3D WHvX64RegisterCr8); tpr =3D vcxt.values[idx++].Reg64; - if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && tpr !=3D vcpu->tpr) { + if (tpr !=3D vcpu->tpr) { vcpu->tpr =3D tpr; cpu_set_apic_tpr(x86_cpu->apic_state, whpx_cr8_to_apic_tpr(tpr)); } @@ -691,9 +756,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel l= evel) * Extended control registers needs to be handled separately depending * on whether xsave is supported/enabled or not. */ - if (level > WHPX_LEVEL_FAST_RUNTIME_STATE) { - whpx_get_xcrs(cpu); - } + whpx_get_xcrs(cpu); =20 /* 16 XMM registers */ assert(whpx_register_names[idx] =3D=3D WHvX64RegisterXmm0); @@ -768,7 +831,7 @@ void whpx_get_registers(CPUState *cpu, WHPXStateLevel l= evel) =20 assert(idx =3D=3D RTL_NUMBER_OF(whpx_register_names)); =20 - if (level > WHPX_LEVEL_FAST_RUNTIME_STATE && whpx_irqchip_in_kernel())= { + if (whpx_irqchip_in_kernel()) { whpx_apic_get(x86_cpu->apic_state); } =20 --=20 2.53.0