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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 34B18C43461 for ; Fri, 16 Apr 2021 16:10:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CCE466113D for ; Fri, 16 Apr 2021 16:10:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CCE466113D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5AA5C6B0070; Fri, 16 Apr 2021 12:10:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 55AC96B0071; Fri, 16 Apr 2021 12:10:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3FB316B0072; Fri, 16 Apr 2021 12:10:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0036.hostedemail.com [216.40.44.36]) by kanga.kvack.org (Postfix) with ESMTP id 23E8B6B0070 for ; Fri, 16 Apr 2021 12:10:39 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D593F5DE5 for ; Fri, 16 Apr 2021 16:10:38 +0000 (UTC) X-FDA: 78038718156.19.1C36848 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf21.hostedemail.com (Postfix) with ESMTP id 2C882E000104 for ; Fri, 16 Apr 2021 16:10:33 +0000 (UTC) Received: from zn.tnic (p200300ec2f0cc5009814827a174df863.dip0.t-ipconnect.de [IPv6:2003:ec:2f0c:c500:9814:827a:174d:f863]) (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 6A3B61EC0266; Fri, 16 Apr 2021 18:10:31 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1618589431; 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:in-reply-to:in-reply-to: references:references; bh=+MJ/0/bCWRz30Mius/GPUqvFtWhZjXcEQ85tGdDxnEo=; b=hsOStmq9d5jwAO8B6qzzf5VDCgjx5/XxwAJLSA2VQ2rYv5uslbCRphvdsyyJnpAOzpo+FH 9U3I0ffyWY/RegHhRlRgbX3Q+MOZkS8RBG1IcvOS8NhJhD06gfFI99DclF1yagr0GM+cC+ xX+x7G9BNyk3o0AaS9loMaucg32h2xo= Date: Fri, 16 Apr 2021 18:10:30 +0200 From: Borislav Petkov To: "Kirill A. Shutemov" Cc: Dave Hansen , Andy Lutomirski , Peter Zijlstra , Sean Christopherson , Jim Mattson , David Rientjes , "Edgecombe, Rick P" , "Kleen, Andi" , "Yamahata, Isaku" , Erdem Aktas , Steve Rutherford , Peter Gonda , David Hildenbrand , x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFCv2 02/13] x86/kvm: Introduce KVM memory protection feature Message-ID: <20210416161030.GC22348@zn.tnic> References: <20210416154106.23721-1-kirill.shutemov@linux.intel.com> <20210416154106.23721-3-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210416154106.23721-3-kirill.shutemov@linux.intel.com> X-Stat-Signature: yj1hykyipsiyao9d6na77qdoob8ynngt X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2C882E000104 Received-SPF: none (alien8.de>: No applicable sender policy available) receiver=imf21; identity=mailfrom; envelope-from=""; helo=mail.skyhub.de; client-ip=5.9.137.197 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618589433-64888 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 Fri, Apr 16, 2021 at 06:40:55PM +0300, Kirill A. Shutemov wrote: > Provide basic helpers, KVM_FEATURE, CPUID flag and a hypercall. > > Host side doesn't provide the feature yet, so it is a dead code for now. > > Signed-off-by: Kirill A. Shutemov > --- > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/include/asm/kvm_para.h | 5 +++++ > arch/x86/include/uapi/asm/kvm_para.h | 3 ++- > arch/x86/kernel/kvm.c | 17 +++++++++++++++++ > include/uapi/linux/kvm_para.h | 3 ++- > 5 files changed, 27 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > index 84b887825f12..d8f3d2619913 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -238,6 +238,7 @@ > #define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* "" VMware prefers VMMCALL hypercall instruction */ > #define X86_FEATURE_SEV_ES ( 8*32+20) /* AMD Secure Encrypted Virtualization - Encrypted State */ > #define X86_FEATURE_VM_PAGE_FLUSH ( 8*32+21) /* "" VM Page Flush MSR is supported */ > +#define X86_FEATURE_KVM_MEM_PROTECTED ( 8*32+22) /* "" KVM memory protection extension */ That feature bit is still unused. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette