From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC7C0C433EF for ; Sun, 8 May 2022 12:38:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233058AbiEHMmZ (ORCPT ); Sun, 8 May 2022 08:42:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232146AbiEHMmX (ORCPT ); Sun, 8 May 2022 08:42:23 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C8EC389A for ; Sun, 8 May 2022 05:38:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652013514; x=1683549514; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=qSKUj5BCwE6SV0HTt3tJ3ivcwbJGH956cwe7y7FlJJU=; b=IousItechp8aU3j90I3ngg2dGEe0ACboPcVUV9eu7v1nz0gxak9oYQtc HOlEnpX3SaJk77ItKzGYbukBb+U0E4HhepIQ/azJ8IIwuvUFLfiLxx0qv Swbqqw2eg1+9r7TGDuia8FK1bXzFq5FkfwZKEQfvmpdCbRg644KkFZj9Z RIfIEOTrJYvfbI0Mh2MSUF2mJ9795toOxJCGP7NsHnFJ+t7a+PdpJqcyM 5kJwoh9fbyhxn1FM8b+JpFOM0Cj+P/MYmC0LB0p5d+eBACYLzsTOHOAhs foFbPXWndhYjw4sTarmxztqezscPRsM0Jl8VsvlGqJVOV3JkfENRyqKYA g==; X-IronPort-AV: E=McAfee;i="6400,9594,10340"; a="267674802" X-IronPort-AV: E=Sophos;i="5.91,208,1647327600"; d="scan'208";a="267674802" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2022 05:38:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,208,1647327600"; d="scan'208";a="710143723" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga001.fm.intel.com with ESMTP; 08 May 2022 05:38:31 -0700 From: Lu Baolu To: Joerg Roedel , Jason Gunthorpe , Alex Williamson , Kevin Tian Cc: Jacob jun Pan , Liu Yi L , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v4 0/4] iommu/vt-d: Force snooping improvement Date: Sun, 8 May 2022 20:35:21 +0800 Message-Id: <20220508123525.1973626-1-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi folks, Previously, the IOMMU capability of enforcing cache coherency was queried through iommu_capable(IOMMU_CAP_CACHE_COHERENCY). This is a global capability, hence the IOMMU driver reports support for this capability only when all IOMMUs in the system has this support. Commit 6043257b1de06 ("iommu: Introduce the domain op enforce_cache_coherency()") converts this into a per-domain test-and-set option, and the previous iommu_capable(IOMMU_CAP_CACHE_COHERENCY) is deprecated. This is a follow-up series which improves the Intel IOMMU driver to support the per-domain scheme better. Best regards, baolu Change log: v4: - Flush caches after changing PGSNP bit in the right way. v3: - https://lore.kernel.org/linux-iommu/20220506052727.1689687-1-baolu.lu@linux.intel.com/ - Hold the device_domain_lock when check and set force snooping. - Refind the commit messages. v2: - https://lore.kernel.org/linux-iommu/20220505010710.1477739-1-baolu.lu@linux.intel.com/ - Check whether force_snooping has already been set in intel_iommu_enforce_cache_coherency(). - Set PGSNP pasid bit field during domain attaching if forcing_snooping is set. - Remove redundant list_empty() checks. - Add dmar_domain->set_pte_snp and set it if force snooping is enforced on a domain with 2nd-level translation. v1: - https://lore.kernel.org/linux-iommu/20220501112434.874236-1-baolu.lu@linux.intel.com - Initial post. Lu Baolu (4): iommu/vt-d: Block force-snoop domain attaching if no SC support iommu/vt-d: Check domain force_snooping against attached devices iommu/vt-d: Remove domain_update_iommu_snooping() iommu/vt-d: Remove hard coding PGSNP bit in PASID entries include/linux/intel-iommu.h | 1 + drivers/iommu/intel/pasid.h | 2 + drivers/iommu/intel/iommu.c | 90 ++++++++++++++++++++++--------------- drivers/iommu/intel/pasid.c | 45 +++++++++++++++++-- 4 files changed, 99 insertions(+), 39 deletions(-) -- 2.25.1