From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753236AbdJaLsl (ORCPT ); Tue, 31 Oct 2017 07:48:41 -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 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,323,1505804400"; d="scan'208";a="169982808" 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 -- 2.14.1