From owner-svn-src-all@freebsd.org Wed May 22 20:58:02 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2C7DF15B729E; Wed, 22 May 2019 20:58:02 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: from mail-it1-f171.google.com (mail-it1-f171.google.com [209.85.166.171]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B3D0869DCC; Wed, 22 May 2019 20:58:01 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: by mail-it1-f171.google.com with SMTP id m141so6000574ita.3; Wed, 22 May 2019 13:58:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=ik3HDrh3fYm3DQLPV1hOOTZw57v3p5y7adNAhdsQ1zc=; b=QmyHsAlgEvge79CGfsMwcudHzAP+SUzVs1iLLYlhOcMgMuysdJ7lMmjwG57nYK/FMW 2tKWUtrypYu8wt3P89oedBx07Wz2zt96VESrfCP2TPO56T7y55pzwliqFKkwhAka0XPX vkZb7RqyoUO1Dl1w49eDQpHbnBBOCT4m42lOk2g4rznpsYAh+0kIOTzXtqQmfeWx+Hro zulERlb8MftIMiZPOeAE+ZgzCBaZNz0A3n5MnV5B8hfz+Y9HmJ7tjUEJwlfYAJ1/fOAF HD/XcmV+uRXccARVewSUDxcK6ecV5mRCnze8dKHCwVeHmgXVBsnKz7RLZlpZXsXNaNB1 TtTw== X-Gm-Message-State: APjAAAX5v7f1TVdkvbkoqxSzu5DFoGHNamQTcpFFU+cT1iB1P04samf7 0ZUmMTYJLJTX3A76PDEfPz28rBwa X-Google-Smtp-Source: APXvYqy6PjP+fYPYTg32dLwEX2XLH8BSvBCTLMN6kdKUNp5Od4B42oug8Gc45bRz7pO3hoIyU1vAvw== X-Received: by 2002:a02:6a28:: with SMTP id l40mr54910321jac.25.1558556750674; Wed, 22 May 2019 13:25:50 -0700 (PDT) Received: from mail-it1-f179.google.com (mail-it1-f179.google.com. [209.85.166.179]) by smtp.gmail.com with ESMTPSA id w4sm7888019iob.46.2019.05.22.13.25.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 May 2019 13:25:50 -0700 (PDT) Received: by mail-it1-f179.google.com with SMTP id g24so5547380iti.5; Wed, 22 May 2019 13:25:50 -0700 (PDT) X-Received: by 2002:a24:e3cb:: with SMTP id d194mr10757695ith.100.1558556750240; Wed, 22 May 2019 13:25:50 -0700 (PDT) MIME-Version: 1.0 References: <201905221344.x4MDiGGV056469@repo.freebsd.org> <00116a41-d811-cda9-304e-589738c54508@FreeBSD.org> <32532943-6b1a-71cc-1d95-f180927eb187@FreeBSD.org> In-Reply-To: <32532943-6b1a-71cc-1d95-f180927eb187@FreeBSD.org> Reply-To: cem@freebsd.org From: Conrad Meyer Date: Wed, 22 May 2019 13:25:39 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: svn commit: r348109 - in head/sys/x86: include x86 To: John Baldwin Cc: Andriy Gapon , src-committers , svn-src-all , svn-src-head X-Rspamd-Queue-Id: B3D0869DCC X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-6.96 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.961,0]; REPLY(-4.00)[]; TAGGED_FROM(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 May 2019 20:58:02 -0000 On Wed, May 22, 2019 at 12:59 PM John Baldwin wrote: > On 5/22/19 12:12 PM, Conrad Meyer wrote: > > On Wed, May 22, 2019 at 11:06 AM Andriy Gapon wrote: > >> > >> On 22/05/2019 16:44, Andrew Gallatin wrote: > >>> This is needed for AMD SMCA processors, as SMCA uses different > >>> MSR address for access MCA banks. > >> > >> Just curious, what is SMCA? > > > > Scalable MCA. It's a set of AMD Fam17h MCA extensions. > > How is it different aside from using different MSR numbers (which seems > a bit gratuitous if that is really all the change is). > > -- > John Baldwin > It adds new MSRs as well, though those are not present in this first change. And adds some information not representable in the =E2=80=9Clegacy= =E2=80=9D MSRs. Some more detail can be found in the linux patches, eg https://lore.kernel.org/patchwork/patch/655889/ .