From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by kanga.kvack.org (Postfix) with ESMTP id 50B3B6B0292 for ; Fri, 23 Jun 2017 09:36:24 -0400 (EDT) Received: by mail-qt0-f199.google.com with SMTP id m54so18820374qtb.9 for ; Fri, 23 Jun 2017 06:36:24 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id r1si3863645qkc.287.2017.06.23.06.36.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Jun 2017 06:36:23 -0700 (PDT) Subject: Re: [PATCH v3 10/11] x86/mm: Enable CR4.PCIDE on supported systems References: <57c1d18b1c11f9bc9a3bcf8bdee38033415e1a13.1498022414.git.luto@kernel.org> From: Boris Ostrovsky Message-ID: Date: Fri, 23 Jun 2017 09:35:44 -0400 MIME-Version: 1.0 In-Reply-To: <57c1d18b1c11f9bc9a3bcf8bdee38033415e1a13.1498022414.git.luto@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski , x86@kernel.org Cc: linux-kernel@vger.kernel.org, Borislav Petkov , Linus Torvalds , Andrew Morton , Mel Gorman , "linux-mm@kvack.org" , Nadav Amit , Rik van Riel , Dave Hansen , Arjan van de Ven , Peter Zijlstra , Juergen Gross > diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c > index f33eef4ebd12..a136aac543c3 100644 > --- a/arch/x86/xen/enlighten_pv.c > +++ b/arch/x86/xen/enlighten_pv.c > @@ -295,6 +295,12 @@ static void __init xen_init_capabilities(void) > setup_clear_cpu_cap(X86_FEATURE_ACC); > setup_clear_cpu_cap(X86_FEATURE_X2APIC); > > + /* > + * Xen PV would need some work to support PCID: CR3 handling as well > + * as xen_flush_tlb_others() would need updating. > + */ > + setup_clear_cpu_cap(X86_FEATURE_PCID); > + > if (!xen_initial_domain()) > setup_clear_cpu_cap(X86_FEATURE_ACPI); > Reviewed-by: Boris Ostrovsky -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org