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=-8.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 215AFC07E96 for ; Tue, 6 Jul 2021 15:16:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FC6061C1E for ; Tue, 6 Jul 2021 15:16:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231860AbhGFPSo (ORCPT ); Tue, 6 Jul 2021 11:18:44 -0400 Received: from smtp-fw-2101.amazon.com ([72.21.196.25]:4749 "EHLO smtp-fw-2101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231748AbhGFPSl (ORCPT ); Tue, 6 Jul 2021 11:18:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1625584563; x=1657120563; h=date:from:to:cc:message-id:references:mime-version: in-reply-to:subject; bh=9L58hslPpBOMuTGHIF6YSUe5tTDWwiAmUslPAdS4H0o=; b=E+r/NCWpy3sQllHIQn6+Oj5mnQhbACOApa4ZnjkJmjoZzQCWJWXfRI97 w9UcNJbe/TVC5L7gCAJbYvpwupEsZ+PSfXuDUiNpogDctuvPO3H+kaBL4 yHFJvKC3+KJZR3BqmgCNDMKKnSNRRFVQogFYSogxeV3j7ju9zN3j7drvR o=; X-IronPort-AV: E=Sophos;i="5.83,328,1616457600"; d="scan'208";a="120509746" Subject: Re: [PATCH v4 0/4] Add support for XMM fast hypercalls Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-1a-e34f1ddc.us-east-1.amazon.com) ([10.43.8.2]) by smtp-border-fw-2101.iad2.amazon.com with ESMTP; 06 Jul 2021 15:15:56 +0000 Received: from EX13D28EUC003.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan3.iad.amazon.com [10.40.159.166]) by email-inbound-relay-1a-e34f1ddc.us-east-1.amazon.com (Postfix) with ESMTPS id 25A1BA07A0; Tue, 6 Jul 2021 15:15:48 +0000 (UTC) Received: from u366d62d47e3651.ant.amazon.com (10.43.160.66) by EX13D28EUC003.ant.amazon.com (10.43.164.43) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Tue, 6 Jul 2021 15:15:40 +0000 Date: Tue, 6 Jul 2021 17:15:36 +0200 From: Siddharth Chandrasekaran To: Paolo Bonzini CC: "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Thomas Gleixner , Ingo Molnar , Borislav Petkov , , "H. Peter Anvin" , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Siddharth Chandrasekaran , Alexander Graf , Evgeny Iakovlev , Liran Alon , Ioannis Aslanidis , , , Message-ID: <20210706151535.GA28697@u366d62d47e3651.ant.amazon.com> References: <20210630115559.GA32360@u366d62d47e3651.ant.amazon.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Originating-IP: [10.43.160.66] X-ClientProxiedBy: EX13D05UWB003.ant.amazon.com (10.43.161.26) To EX13D28EUC003.ant.amazon.com (10.43.164.43) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 06, 2021 at 05:04:59PM +0200, Paolo Bonzini wrote: > On 30/06/21 13:56, Siddharth Chandrasekaran wrote: > > On Wed, May 26, 2021 at 10:56:07AM +0200, Siddharth Chandrasekaran wrote: > > > Hyper-V supports the use of XMM registers to perform fast hypercalls. > > > This allows guests to take advantage of the improved performance of the > > > fast hypercall interface even though a hypercall may require more than > > > (the current maximum of) two general purpose registers. > > > > > > The XMM fast hypercall interface uses an additional six XMM registers > > > (XMM0 to XMM5) to allow the caller to pass an input parameter block of > > > up to 112 bytes. Hyper-V can also return data back to the guest in the > > > remaining XMM registers that are not used by the current hypercall. > > > > > > Although the Hyper-v TLFS mentions that a guest cannot use this feature > > > unless the hypervisor advertises support for it, some hypercalls which > > > we plan on upstreaming in future uses them anyway. This patchset adds > > > necessary infrastructure for handling input/output via XMM registers and > > > patches kvm_hv_flush_tlb() to use xmm input arguments. > > > > Hi Paolo, > > > > Are you expecting more reviews on these patches? > > They are part of 5.14 already. :) Ahh, I see them now. I was expecting them to show up in master - that was the confusion. Thanks! :) ~ Sid Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879