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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 376A0C433DF for ; Tue, 23 Jun 2020 15:51:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 048C02073E for ; Tue, 23 Jun 2020 15:51:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="L3laiMxC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733016AbgFWPvy (ORCPT ); Tue, 23 Jun 2020 11:51:54 -0400 Received: from mail.skyhub.de ([5.9.137.197]:58620 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731870AbgFWPvy (ORCPT ); Tue, 23 Jun 2020 11:51:54 -0400 Received: from zn.tnic (p200300ec2f0d470028fe1155168fd3d2.dip0.t-ipconnect.de [IPv6:2003:ec:2f0d:4700:28fe:1155:168f:d3d2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id C05C01EC0318; Tue, 23 Jun 2020 17:51:52 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1592927512; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2M4dPDLeLsejQozbS41vpz4rnLlW8vCdyqTb0kIw2d8=; b=L3laiMxCskkcebkat4zrLZQGr1hD02Dv29rK5VGvx7Sm1nAayDeF6xBed99AUxBGn3rThu bArWMr3Qs5gJg7hDP6BLlgtcGOSPo8e17/oq1Mel0/393sSFGOcCGrIF0aLvviN3EchPeO Xbdwn8DRLHajvZNTd2fREOPxoBsKLBo= Date: Tue, 23 Jun 2020 17:51:44 +0200 From: Borislav Petkov To: Andrew Cooper Cc: Joerg Roedel , Peter Zijlstra , Andy Lutomirski , Joerg Roedel , Dave Hansen , Tom Lendacky , Mike Stunes , Dan Williams , Dave Hansen , "H. Peter Anvin" , Juergen Gross , Jiri Slaby , Kees Cook , kvm list , LKML , Thomas Hellstrom , Linux Virtualization , X86 ML , Sean Christopherson Subject: Re: Should SEV-ES #VC use IST? (Re: [PATCH] Allow RDTSC and RDTSCP from userspace) Message-ID: <20200623155144.GD32590@zn.tnic> References: <20200425191032.GK21900@8bytes.org> <910AE5B4-4522-4133-99F7-64850181FBF9@amacapital.net> <20200425202316.GL21900@8bytes.org> <20200428075512.GP30814@suse.de> <20200623110706.GB4817@hirez.programming.kicks-ass.net> <20200623113007.GH31822@suse.de> <8413fe52-04ee-f4e1-873c-17595110856a@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8413fe52-04ee-f4e1-873c-17595110856a@citrix.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Jun 23, 2020 at 12:51:03PM +0100, Andrew Cooper wrote: > Crashing out hard if the hypervisor is misbehaving is acceptable.  In a > cloud, I as a customer would (threaten to?) take my credit card > elsewhere, while for enterprise, I'd shout at my virtualisation vendor > until a fix happened (also perhaps threaten to take my credit card > elsewhere). This is called customer, credit-card-enforced bug fixing. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette