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[198.145.29.99]) by mx.google.com with ESMTPS id b6si17894430pgk.279.2019.05.13.08.45.58 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 08:45:59 -0700 (PDT) Received-SPF: pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="Os4/hJwW"; spf=pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=luto@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mail-wr1-f42.google.com (mail-wr1-f42.google.com [209.85.221.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4C94C21537 for ; Mon, 13 May 2019 15:45:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557762358; bh=BABeuTSqBcwBR4EDIoxeTc9kWB/TDj6EfW9QIQhsYNY=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=Os4/hJwWSkAdbGceMgGRjKFt8j+/6lOvqEBDCCCNQBIVuwuamTCRkhBSqlKoOIc3B bKg4d8F9EV+vF3Ma9/80M5RXduvPhjC/zADKDy9UjeOXh0Lpprw9DYBC66fJ2hbnW8 5AX19NgZ7HW2pLeO0tk2CRUtry4EHPrNeSrw6c9k= Received: by mail-wr1-f42.google.com with SMTP id w12so15874685wrp.2 for ; Mon, 13 May 2019 08:45:58 -0700 (PDT) X-Received: by 2002:a5d:45c7:: with SMTP id b7mr5830508wrs.176.1557762356875; Mon, 13 May 2019 08:45:56 -0700 (PDT) MIME-Version: 1.0 References: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com> <1557758315-12667-4-git-send-email-alexandre.chartre@oracle.com> In-Reply-To: <1557758315-12667-4-git-send-email-alexandre.chartre@oracle.com> From: Andy Lutomirski Date: Mon, 13 May 2019 08:45:44 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [RFC KVM 03/27] KVM: x86: Introduce KVM separate virtual address space To: Alexandre Chartre Cc: Paolo Bonzini , Radim Krcmar , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andrew Lutomirski , Peter Zijlstra , kvm list , X86 ML , Linux-MM , LKML , Konrad Rzeszutek Wilk , jan.setjeeilers@oracle.com, Liran Alon , Jonathan Adams Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, May 13, 2019 at 7:39 AM Alexandre Chartre wrote: > > From: Liran Alon > > Create a separate mm for KVM that will be active when KVM #VMExit > handlers run. Up until the point which we architectully need to > access host (or other VM) sensitive data. > > This patch just create kvm_mm but never makes it active yet. > This will be done by next commits. NAK to this whole pile of code. KVM is not so special that it can duplicate core infrastructure like this. Use copy_init_mm() or improve it as needed. --Andy