Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932290AbaJWRbf (ORCPT ); Thu, 23 Oct 2014 13:31:35 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:19628 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754560AbaJWRbe (ORCPT ); Thu, 23 Oct 2014 13:31:34 -0400 X-IronPort-AV: E=Sophos;i="5.04,776,1406592000"; d="scan'208";a="185620956" Date: Thu, 23 Oct 2014 18:26:36 +0100 From: Stefano Stabellini X-X-Sender: sstabellini@kaball.uk.xensource.com To: CC: Konrad Rzeszutek Wilk , Ian Campbell , David Vrabel , , Stefano Stabellini , , Subject: [PATCH v5 0/6] introduce GNTTABOP_cache_flush Message-ID: User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, this patch series introduces support for GNTTABOP_cache_flush to perform cache maintenance operation on foreign pages and reverts the current code based on XENFEAT_grant_map_identity. It also provides a very slow fallback by bouncing on the swiotlb buffer, in case the hypercall is not available. v5 introduces is_dma_coherent as a Xen specific utility function named xen_is_dma_coherent. However in the future we are going to re-work it as a proper common arch/arm (and arch/arm64) function. Changes in v5: - introduce xen_is_dma_coherent as a xen specific function; - call xen_is_dma_coherent instead of is_dma_coherent; - introduce xen_is_dma_coherent to arch/arm64/include/asm/xen/page-coherent.h; - do not remove arch/arm64/include/asm/xen/page-coherent.h, add the missing dma_ops calls from it; - fix indentation; - rename hypercall_flush to hypercall_cflush; - remove spurious change. Changes in v4: - remove outer_*_range call; - introduce is_dma_coherent; - use is_dma_coherent in arch/arm/xen/mm32.c; - merge xen/mm32.c into xen/mm.c; - xen/arm/arm64: introduce xen_arch_need_swiotlb; - avoid bouncing dma map operations that involve foreign grants and non-coherent devices if GNTTABOP_cache_flush is provided by Xen. Changes in v3: - fix the cache maintenance op call to match what Linux does natively; - update the hypercall interface to match Xen. Changes in v2: - remove the definition of XENFEAT_grant_map_identity; - update the hypercall interface to match Xen; - call the interface on a single page at a time. Stefano Stabellini (6): xen/arm: remove handling of XENFEAT_grant_map_identity xen/arm: remove outer_*_range call xen/arm: introduce xen_is_dma_coherent xen/arm/arm64: merge xen/mm32.c into xen/mm.c xen/arm/arm64: introduce xen_arch_need_swiotlb xen/arm: introduce GNTTABOP_cache_flush arch/arm/include/asm/xen/page-coherent.h | 5 + arch/arm/include/asm/xen/page.h | 4 + arch/arm/xen/Makefile | 2 +- arch/arm/xen/enlighten.c | 5 - arch/arm/xen/mm.c | 160 ++++++++++++++++++++++ arch/arm/xen/mm32.c | 202 ---------------------------- arch/arm64/include/asm/xen/page-coherent.h | 25 ++-- arch/x86/include/asm/xen/page.h | 7 + drivers/xen/swiotlb-xen.c | 5 +- include/xen/interface/features.h | 3 - include/xen/interface/grant_table.h | 19 +++ 11 files changed, 213 insertions(+), 224 deletions(-) delete mode 100644 arch/arm/xen/mm32.c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/