From patchwork Tue Oct 31 11:48:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haozhong Zhang X-Patchwork-Id: 10034303 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 74D23602B9 for ; Tue, 31 Oct 2017 11:49:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6D99D28A5C for ; Tue, 31 Oct 2017 11:49:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 625CB28A6E; Tue, 31 Oct 2017 11:49:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D44828A5C for ; Tue, 31 Oct 2017 11:49:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753163AbdJaLsk (ORCPT ); Tue, 31 Oct 2017 07:48:40 -0400 Received: from mga01.intel.com ([192.55.52.88]:33910 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753067AbdJaLsh (ORCPT ); Tue, 31 Oct 2017 07:48:37 -0400 Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Oct 2017 04:48:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,323,1505804400"; d="scan'208";a="169982808" Received: from hz-desktop.sh.intel.com (HELO localhost) ([10.239.159.142]) by fmsmga006.fm.intel.com with ESMTP; 31 Oct 2017 04:48:32 -0700 From: Haozhong Zhang To: kvm@vger.kernel.org, x86@kernel.org Cc: linux-kernel@vger.kernel.org, Paolo Bonzini , rkrcmar@redhat.com, Xiao Guangrong , Dan Williams , ivan.d.cuevas.escareno@intel.com, karthik.kumar@intel.com, Haozhong Zhang Subject: [PATCH v2 1/2] x86/mm: expose lookup_memtype() Date: Tue, 31 Oct 2017 19:48:39 +0800 Message-Id: <20171031114840.12615-2-haozhong.zhang@intel.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20171031114840.12615-1-haozhong.zhang@intel.com> References: <20171031114840.12615-1-haozhong.zhang@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP KVM MMU will use it to get the cache mode of the host page. Signed-off-by: Haozhong Zhang --- arch/x86/include/asm/pat.h | 2 ++ arch/x86/mm/pat.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index fffb2794dd89..990d955972b8 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -21,4 +21,6 @@ int io_reserve_memtype(resource_size_t start, resource_size_t end, void io_free_memtype(resource_size_t start, resource_size_t end); +enum page_cache_mode lookup_memtype(u64 paddr); + #endif /* _ASM_X86_PAT_H */ diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index fe7d57a8fb60..e85987aaf5d5 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -650,7 +650,7 @@ int free_memtype(u64 start, u64 end) * Returns _PAGE_CACHE_MODE_WB, _PAGE_CACHE_MODE_WC, _PAGE_CACHE_MODE_UC_MINUS * or _PAGE_CACHE_MODE_WT. */ -static enum page_cache_mode lookup_memtype(u64 paddr) +enum page_cache_mode lookup_memtype(u64 paddr) { enum page_cache_mode rettype = _PAGE_CACHE_MODE_WB; struct memtype *entry; @@ -676,6 +676,7 @@ static enum page_cache_mode lookup_memtype(u64 paddr) spin_unlock(&memtype_lock); return rettype; } +EXPORT_SYMBOL_GPL(lookup_memtype); /** * io_reserve_memtype - Request a memory type mapping for a region of memory