From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932521AbdLTT7O (ORCPT ); Wed, 20 Dec 2017 14:59:14 -0500 Received: from mga06.intel.com ([134.134.136.31]:28152 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932470AbdLTT7J (ORCPT ); Wed, 20 Dec 2017 14:59:09 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,433,1508828400"; d="scan'208";a="13971390" From: Sohil Mehta To: Joerg Roedel , Alex Williamson Cc: David Woodhouse , Ashok Raj , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Jacob Pan , Gayatri Kammela , Sohil Mehta , Ravi V Shankar , Andy Shevchenko , Lu Baolu , Fenghua Yu , Kirill Shutemov , Dave Hansen Subject: [PATCH 1/4] iommu/vt-d: Enable upto 57 bits of domain address width Date: Wed, 20 Dec 2017 11:59:24 -0800 Message-Id: <1513799967-22454-2-git-send-email-sohil.mehta@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513799967-22454-1-git-send-email-sohil.mehta@intel.com> References: <1513799967-22454-1-git-send-email-sohil.mehta@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the IOMMU default domain address width to 57 bits. This would enable the IOMMU to do upto 5-levels of paging for second level translations - IOVA translation requests without PASID. Even though the maximum supported address width is being increased to 57, __iommu_calculate_agaw() would set the actual supported address width to the maximum support available in IOMMU hardware. Signed-off-by: Sohil Mehta --- drivers/iommu/intel-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 4a2de34..457795b 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -64,7 +64,7 @@ #define IOAPIC_RANGE_END (0xfeefffff) #define IOVA_START_ADDR (0x1000) -#define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 +#define DEFAULT_DOMAIN_ADDRESS_WIDTH 57 #define MAX_AGAW_WIDTH 64 #define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT) -- 2.7.4