From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24C52C76190 for ; Mon, 15 Jul 2019 09:17:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07FE320838 for ; Mon, 15 Jul 2019 09:17:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729581AbfGOJRC (ORCPT ); Mon, 15 Jul 2019 05:17:02 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:32947 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729496AbfGOJRB (ORCPT ); Mon, 15 Jul 2019 05:17:01 -0400 Received: by mail-wm1-f67.google.com with SMTP id h19so13824718wme.0 for ; Mon, 15 Jul 2019 02:16:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=v5fo+uSi73xpR+4ETmGVl9w7fmYmhPooNofZwTaxS60=; b=QOf8IFQxzTHXVZqAIBKh81bJKzMUCaOE2Oi3BhpMd1Vz9RavscY08HhcPN2O7C3NpO bURFfmHYTM53qw+HTZ9BssdEmPPBHhoKxmZw/5P9KmbpgxQzpRUJ3Ij+vtcFfUjjl5bG TbfaC3Ynt6tXL6NEAIjT4P3M/fLLMsnY/SrOitF+NNh0r1tvUk8+fsDm2kyzHQKX/Wit /LzH+PEdkiChcVAeZhISj7fzs+m1FwjCbtEzwfx1BfYlbbMRHNjU3g6CPQnoh1y4tKwd nPJE1x7ty0PwA8X1y+aUAVP8WafNB1YZzf34hVG/NXpSS6O04RurSYc6ViOzxZYuDvc2 39Uw== X-Gm-Message-State: APjAAAXpjzhUEZ0SEQ/CMrJhAaA+vjkuInzxsp2PqzfREOo9kgif9//q LtQMA55D4TQCZU6/wVbwAMftIQ== X-Google-Smtp-Source: APXvYqx/8fS4DHovqQrXPURh4GRC5n8Wt1AN2V3TGuiwf2O7Uf1HvdjxSGYzf+fWQVXcWRo5LGl0GA== X-Received: by 2002:a1c:20c3:: with SMTP id g186mr11970612wmg.15.1563182219160; Mon, 15 Jul 2019 02:16:59 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:e983:8394:d6:a612? ([2001:b07:6468:f312:e983:8394:d6:a612]) by smtp.gmail.com with ESMTPSA id x20sm12605163wmc.1.2019.07.15.02.16.58 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Mon, 15 Jul 2019 02:16:58 -0700 (PDT) Subject: Re: [PATCH RESEND] i386/kvm: support guest access CORE cstate To: Wanpeng Li , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Eduardo Habkost References: <1563154124-18579-1-git-send-email-wanpengli@tencent.com> From: Paolo Bonzini Openpgp: preference=signencrypt Message-ID: Date: Mon, 15 Jul 2019 11:16:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <1563154124-18579-1-git-send-email-wanpengli@tencent.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 15/07/19 03:28, Wanpeng Li wrote: > From: Wanpeng Li > > Allow guest reads CORE cstate when exposing host CPU power management capabilities > to the guest. PKG cstate is restricted to avoid a guest to get the whole package > information in multi-tenant scenario. > > Cc: Eduardo Habkost > Cc: Paolo Bonzini > Cc: Radim Krčmář > Signed-off-by: Wanpeng Li Hi, QEMU is in hard freeze now. This will be applied after the release. Thanks, Paolo > --- > linux-headers/linux/kvm.h | 4 +++- > target/i386/kvm.c | 3 ++- > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h > index b53ee59..d648fde 100644 > --- a/linux-headers/linux/kvm.h > +++ b/linux-headers/linux/kvm.h > @@ -696,9 +696,11 @@ struct kvm_ioeventfd { > #define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0) > #define KVM_X86_DISABLE_EXITS_HLT (1 << 1) > #define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2) > +#define KVM_X86_DISABLE_EXITS_CSTATE (1 << 3) > #define KVM_X86_DISABLE_VALID_EXITS (KVM_X86_DISABLE_EXITS_MWAIT | \ > KVM_X86_DISABLE_EXITS_HLT | \ > - KVM_X86_DISABLE_EXITS_PAUSE) > + KVM_X86_DISABLE_EXITS_PAUSE | \ > + KVM_X86_DISABLE_EXITS_CSTATE) > > /* for KVM_ENABLE_CAP */ > struct kvm_enable_cap { > diff --git a/target/i386/kvm.c b/target/i386/kvm.c > index 3b29ce5..49a0cc1 100644 > --- a/target/i386/kvm.c > +++ b/target/i386/kvm.c > @@ -1645,7 +1645,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s) > if (disable_exits) { > disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT | > KVM_X86_DISABLE_EXITS_HLT | > - KVM_X86_DISABLE_EXITS_PAUSE); > + KVM_X86_DISABLE_EXITS_PAUSE | > + KVM_X86_DISABLE_EXITS_CSTATE); > } > > ret = kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0, >