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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDDBFC43334 for ; Tue, 14 Jun 2022 07:45:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352820AbiFNHpJ (ORCPT ); Tue, 14 Jun 2022 03:45:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238963AbiFNHpH (ORCPT ); Tue, 14 Jun 2022 03:45:07 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 28C2725EB9 for ; Tue, 14 Jun 2022 00:45:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655192705; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=dgyIXyBsOELAwe/LYhSIfeWs8SqQKOJEdzlYMa9u4pA=; b=YVdResl+eNTZ6sCAHvuGG9/55k9kUq7yDU9fTkDANCb53ivmFLts4PrV31IoE4kgadLyqZ ah4HHj9sU+evzd6SZSWImyYXEVSl8X1mmuGEFh8TSM6KBD2TimrWL80aJGaN7Tz+nCvaya ZqfI8QfJ4+51m4kSpIqLAPDabgIIU7o= Received: from mail-ej1-f71.google.com (mail-ej1-f71.google.com [209.85.218.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-497-HnPPc3sQN0a1jBnSm5HJZA-1; Tue, 14 Jun 2022 03:45:03 -0400 X-MC-Unique: HnPPc3sQN0a1jBnSm5HJZA-1 Received: by mail-ej1-f71.google.com with SMTP id gh36-20020a1709073c2400b0070759e390fbso2495569ejc.13 for ; Tue, 14 Jun 2022 00:45:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=dgyIXyBsOELAwe/LYhSIfeWs8SqQKOJEdzlYMa9u4pA=; b=GqU4OH/7xqQ7LbVo070bWmuSYm2aTgQ6X6K0bVNisy1xTGAEmR5o2e177YGnjB49ar x5zTh6D+/5yn0MRWXEG5bu4mVTXSY7ZJsjB9flad8KNx/QeIJo3rJyGw6FacXCk22c3G REpLxHlTB9zDKLW0M2QfBhNNfmhmO2rzUtBWsvvaoFAj5ROJB6Iw18wChjoazdTs0wRU vi6Ws12YffnE1HsWLpf/hzhnxpqohOnsRI/At+4Z5qL1pYNHuw2FpnYZYLd0sU6Udjw5 q1fepZI1NLhzlgIrL3YYCV5tGt0ysVWdqPrtBSMjo3vYP20ZVyJBdkuPHxidZ5DVqnqF bnMw== X-Gm-Message-State: AJIora85C1quvb4/PbQoGaV+CCwV+lYRtHL5uBn4fqadEspq8cFPTMJm /UrYLe70BAod2qPcM5Xl3HedYjYoFAMd6qAHlS9KJItZGESbbekSVadfjtRnlI3XYWUZs/VN3/Z cHraWMzRF0/tu X-Received: by 2002:aa7:c84d:0:b0:431:4226:70c9 with SMTP id g13-20020aa7c84d000000b00431422670c9mr4271495edt.51.1655192702384; Tue, 14 Jun 2022 00:45:02 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwJ5IlXxslNIf6I97hjXfT4GlolXDA60Ma8Z62WzRzPo1MZt3AJ8Xm7QzGo4XAnyp297JvrmA== X-Received: by 2002:aa7:c84d:0:b0:431:4226:70c9 with SMTP id g13-20020aa7c84d000000b00431422670c9mr4271477edt.51.1655192702127; Tue, 14 Jun 2022 00:45:02 -0700 (PDT) Received: from fedora (nat-2.ign.cz. [91.219.240.2]) by smtp.gmail.com with ESMTPSA id z6-20020a056402274600b0042def6cd141sm6689297edd.30.2022.06.14.00.45.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jun 2022 00:45:01 -0700 (PDT) From: Vitaly Kuznetsov To: Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Like Xu , Paolo Bonzini Subject: Re: [PATCH 6/7] KVM: x86: Ignore benign host accesses to "unsupported" PEBS and BTS MSRs In-Reply-To: <20220611005755.753273-7-seanjc@google.com> References: <20220611005755.753273-1-seanjc@google.com> <20220611005755.753273-7-seanjc@google.com> Date: Tue, 14 Jun 2022 09:45:01 +0200 Message-ID: <875yl3k7sy.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Sean Christopherson writes: > Ignore host userspace reads and writes of '0' to PEBS and BTS MSRs that > KVM reports in the MSR-to-save list, but the MSRs are ultimately > unsupported. All MSRs in said list must be writable by userspace, e.g. > if userspace sends the list back at KVM without filtering out the MSRs it > doesn't need. > > 8183a538cd95 ("KVM: x86/pmu: Add IA32_DS_AREA MSR emulation to support guest DS") > 902caeb6841a ("KVM: x86/pmu: Add PEBS_DATA_CFG MSR emulation to support adaptive PEBS") > c59a1f106f5c ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS") These are 'Fixes:' tags I suppose? ... -- Vitaly