[RFC,19/42] iommu/vt-d: Set bit PGSNP in PASIDTE if domain cache coherency is enforced
Message ID | 20231202092452.14581-1-yan.y.zhao@intel.com |
---|---|
State | New |
Headers |
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[2620:137:e000::3:7]) by mx.google.com with ESMTPS id c8-20020a17090a1d0800b0028658c54f6bsi2754848pjd.11.2023.12.02.01.53.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Dec 2023 01:53:56 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=eWHszJLN; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 495A8806083C; Sat, 2 Dec 2023 01:53:55 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229472AbjLBJxq (ORCPT <rfc822;pwkd43@gmail.com> + 99 others); Sat, 2 Dec 2023 04:53:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232345AbjLBJxp (ORCPT <rfc822;linux-kernel@vger.kernel.org>); Sat, 2 Dec 2023 04:53:45 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A5F7AD50; Sat, 2 Dec 2023 01:53:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701510832; x=1733046832; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=DNvEQ5Df+enLLKlvPpgNl8iSMA8LDSmYdeB3/CStJvw=; b=eWHszJLNQJpKxhmd4cOBWfgH2FcceSsLHm0/+Eaq7DmcxmUaU6zWQ2q5 TLTcyJ7S6IfQBGW7ZtE0dyHDUES+kgi6i7EJIEpB9zQCqz/yUIyjkWWzz 6hh/V8edrecTCYxVNMcCUs9yFJz/ha51H6ZmgRVbVOEuAYkPXeP/lfFYt QUTOQIMyaynYXcfJ5pY3Eouv4Y7AOD1WTlQX55Pq7DqZ5ydrnF1vfnKl6 PkZhw6+Qg9ZHBBb37EbYvdxo9iqKZLHfcbBeU9j7OuT40g8KyWXEkWokb OLVjRywITAeACNkHF06HGplHt263b+U5MPggfldLqw1osDXEW/YZxCoke g==; X-IronPort-AV: E=McAfee;i="6600,9927,10911"; a="625567" X-IronPort-AV: E=Sophos;i="6.04,245,1695711600"; d="scan'208";a="625567" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2023 01:53:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10911"; a="719780723" X-IronPort-AV: E=Sophos;i="6.04,245,1695711600"; d="scan'208";a="719780723" Received: from yzhao56-desk.sh.intel.com ([10.239.159.62]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2023 01:53:47 -0800 From: Yan Zhao <yan.y.zhao@intel.com> To: iommu@lists.linux.dev, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: alex.williamson@redhat.com, jgg@nvidia.com, pbonzini@redhat.com, seanjc@google.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, dwmw2@infradead.org, yi.l.liu@intel.com, Yan Zhao <yan.y.zhao@intel.com> Subject: [RFC PATCH 19/42] iommu/vt-d: Set bit PGSNP in PASIDTE if domain cache coherency is enforced Date: Sat, 2 Dec 2023 17:24:52 +0800 Message-Id: <20231202092452.14581-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231202091211.13376-1-yan.y.zhao@intel.com> References: <20231202091211.13376-1-yan.y.zhao@intel.com> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Sat, 02 Dec 2023 01:53:55 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1784163426799993679 X-GMAIL-MSGID: 1784163426799993679 |
Series |
Sharing KVM TDP to IOMMU
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Commit Message
Yan Zhao
Dec. 2, 2023, 9:24 a.m. UTC
Set bit PGSNP (Page Snoop, bit 88) in PASIDTE when attaching device to a
domain whose cache coherency is enforced.
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
---
drivers/iommu/intel/pasid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 74e8e4c17e814..a42955b5e666f 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -679,10 +679,11 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu, pasid_set_address_width(pte, agaw); pasid_set_translation_type(pte, PASID_ENTRY_PGTT_SL_ONLY); pasid_set_fault_enable(pte); + if (domain->force_snooping) + pasid_set_pgsnp(pte); pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); if (domain->dirty_tracking) pasid_set_ssade(pte); - pasid_set_present(pte); spin_unlock(&iommu->lock);