From patchwork Thu Feb 8 09:44:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Wanpeng Li X-Patchwork-Id: 870783 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="ICcj1RCa"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3zcYFq4Qffz9sRV for ; Thu, 8 Feb 2018 20:45:03 +1100 (AEDT) Received: from localhost ([::1]:36002 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ejilJ-0003mh-Op for incoming@patchwork.ozlabs.org; Thu, 08 Feb 2018 04:45:01 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57350) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ejikn-0003j5-2B for qemu-devel@nongnu.org; Thu, 08 Feb 2018 04:44:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ejikj-0002y2-Vd for qemu-devel@nongnu.org; Thu, 08 Feb 2018 04:44:29 -0500 Received: from mail-pf0-x241.google.com ([2607:f8b0:400e:c00::241]:36605) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ejikj-0002vy-Os for qemu-devel@nongnu.org; Thu, 08 Feb 2018 04:44:25 -0500 Received: by mail-pf0-x241.google.com with SMTP id k5so1541530pff.3 for ; Thu, 08 Feb 2018 01:44:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=vyr9oQjydbWL5EfE7BjgU2luLV9zw8XQWRPleN1zLbw=; b=ICcj1RCaeumenOhxs0anF/4QCaDufb9qy4ZHn+jwIyeO3tA8j0RPPVRCwYCGgFiMog IPtGYh70xWz2QMCCTU7BjMX0vCGCyNvLjVeYrANFPZ/3M+UI72R/BUgXwAyQ7+tZ5HkL FTwlimz0wAGwrfTsN8VKMSUm8Q789hBZswVufLSwF3NwoqnZFsLds4iBGdrrNP75FOR2 1Cdqr8Dt+/seibCvUvuHTT/LLisc9vltXdlAtYt4IZjyOmErjuDZD7ftLlEe91i7gXLK A2jeTBCiaP6Vx3s1oSGYi57luZitEoXG4hRn2Tiv/aBufSH2p9fNs+SUEebFz69yGdAl 0SXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=vyr9oQjydbWL5EfE7BjgU2luLV9zw8XQWRPleN1zLbw=; b=FJIY0d7wBJUBHszrV6SYsf89vjqbAeByWqxNiVLrveT1Pu70uVXBAPRMQf6YaPs69o glduzVMBxsYLoyWQSe6YcdVraA9oHBW4BSQ2QZMElEKrvaIy0ud1wJ+6PyHwHw9upplB bPuLCmm/zBkSs7CVvH+N7T6Y7LxIlcYhmQaSAcuzPrEV5ih3F6iId37fEJ0PG81XPhLB SEHiFrduZwrRQKw+xvUrfgYQpu14JXIMRM40XNIaCQT3GTEghas/y/F4dehkoKR56bDX wsqHOP91Verm/7yJzPQyKJEWS1zOHqheVnegPG/mMFAarPVSnZ69qhPjD4Zu/EMhScvu KPFA== X-Gm-Message-State: APf1xPALAJVAWwMZ8R1ob6NC8/OQqzvfaq1RFrJjZaM9l3keyv8pVtbH RJ572TzSqeGXFv/YjDT+9Bi83Q== X-Google-Smtp-Source: AH8x224k3N2bEi4Gy8z+wJjtWLTbb2rg4yEtZhJTfhGmCfk4/VyhnCZSyqWl7ZwYgazWfAiJC03i/w== X-Received: by 10.98.233.10 with SMTP id j10mr55279pfh.123.1518083064477; Thu, 08 Feb 2018 01:44:24 -0800 (PST) Received: from localhost.localdomain ([203.205.141.123]) by smtp.googlemail.com with ESMTPSA id i3sm7196396pgs.63.2018.02.08.01.44.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 08 Feb 2018 01:44:24 -0800 (PST) From: Wanpeng Li X-Google-Original-From: Wanpeng Li To: qemu-devel@nongnu.org, kvm@vger.kernel.org Date: Thu, 8 Feb 2018 17:44:20 +0800 Message-Id: <1518083060-5881-1-git-send-email-wanpengli@tencent.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::241 Subject: [Qemu-devel] [PATCH] target-i386: adds PV_DEDICATED hint CPUID feature bit X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Eduardo Habkost , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Wanpeng Li Add PV_DEDICATED hint cpuid feature bit. Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Eduardo Habkost Signed-off-by: Wanpeng Li --- target/i386/cpu.c | 4 ++++ target/i386/cpu.h | 3 +++ 2 files changed, 7 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index d70954b..cf48931 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -4076,6 +4076,9 @@ static int x86_cpu_filter_features(X86CPU *cpu) x86_cpu_get_supported_feature_word(w, false); uint32_t requested_features = env->features[w]; env->features[w] &= host_feat; + if (cpu->pv_dedicated && (w == FEAT_KVM)) { + env->features[w] |= CPUID_PV_DEDICATED; + } cpu->filtered_features[w] = requested_features & ~env->features[w]; if (cpu->filtered_features[w]) { rv = 1; @@ -4682,6 +4685,7 @@ static Property x86_cpu_properties[] = { false), DEFINE_PROP_BOOL("vmware-cpuid-freq", X86CPU, vmware_cpuid_freq, true), DEFINE_PROP_BOOL("tcg-cpuid", X86CPU, expose_tcg, true), + DEFINE_PROP_BOOL("pv-dedicated", X86CPU, pv_dedicated, false), /* * From "Requirements for Implementing the Microsoft diff --git a/target/i386/cpu.h b/target/i386/cpu.h index f91e37d..8000da5 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -672,6 +672,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Prediction Barrier */ +#define CPUID_PV_DEDICATED (1U << 8) + #define CPUID_XSAVE_XSAVEOPT (1U << 0) #define CPUID_XSAVE_XSAVEC (1U << 1) #define CPUID_XSAVE_XGETBV1 (1U << 2) @@ -1276,6 +1278,7 @@ struct X86CPU { bool expose_kvm; bool expose_tcg; bool migratable; + bool pv_dedicated; bool max_features; /* Enable all supported features automatically */ uint32_t apic_id;