From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZreddMmItUDYB9VED1pQJ2QcW/jZJIDwQ9RkotNaHmzx/yj4rrp+O0NX7fUEHxeXnh9yVY+ ARC-Seal: i=1; a=rsa-sha256; t=1526071895; cv=none; d=google.com; s=arc-20160816; b=0G1hHv7NEWgtNmkzONJMMo3HutmQ5EAK26UrDEhNJpNB0hHAxl0K/B4+RrKwDM2epT jSkmwMiIGpMoyEjdzC0rhy6iMOo7lB2blhBiQHDufTL9N9qgTLBgC/PUxMsvBn9bXOUS TMsHSGZ7swoJnbaGxFeZAzGVz/JoAg73G8PT/Mpu9i5YuwrqK4zDCNfPb6pu63YHJOYU qiVyzDo1Wufm8a/BGTNn+WapYSGepZh8oCH4TfkhogfWqw/TZG7H1UdhySb8bu30rMuD J53enRF8y5YJuxOTGbMGhI2zdSUCef4t6qTA35YnY7KAs44V5aUjlsqhW4i90xpuOskJ r9CQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :arc-authentication-results; bh=gpL1yKAn4vTIIPj+2YRp2a32xwSR212L6qyEpVFXbDQ=; b=txsq6GzsKqok6XodtRKUTFQfYiaDJP1XcRHIoL38DilDAf55pqG/iYkzhFp6K3n+J2 5qBkT1QoO9xVl27MMlJxwz1KxqMdFuVv9EwFEcxWA1aydG6nd4Euwx6dyezlieX8Vz2c UkhQAlJ/etDYG5O/9EcIdhKvNhFvOWkAaGvJJBgxJ616RL5li8FExKfimFWxsxPi26aM c3LS7ccY1ehAGQQFb9vRo42lxHa+ZR6n+B8fbtbCKLLvZz1CGhr+kuCue235BGPknz7R ktM3hlNZsNpyLJ+AQwv3ty/e3kfVn7kXEdm76LgF0105O9HGyvMiUfBi1C+on6A9obt4 L8gw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of jacob.jun.pan@linux.intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=jacob.jun.pan@linux.intel.com Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of jacob.jun.pan@linux.intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=jacob.jun.pan@linux.intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,390,1520924400"; d="scan'208";a="41104795" From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse , Greg Kroah-Hartman , Alex Williamson , Jean-Philippe Brucker Cc: Rafael Wysocki , "Liu, Yi L" , "Tian, Kevin" , Raj Ashok , Jean Delvare , "Christoph Hellwig" , "Lu Baolu" , Jacob Pan Subject: [PATCH v5 20/23] iommu/intel-svm: do not flush iotlb for viommu Date: Fri, 11 May 2018 13:54:12 -0700 Message-Id: <1526072055-86990-21-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526072055-86990-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1526072055-86990-1-git-send-email-jacob.jun.pan@linux.intel.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1600202363980525687?= X-GMAIL-MSGID: =?utf-8?q?1600202363980525687?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: vIOMMU passdown invalidation will be inclusive, PASID cache invalidation includes TLBs. See Intel VT-d Specification Ch 6.5.2.2 for details. Signed-off-by: Jacob Pan --- drivers/iommu/intel-svm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index bdda1b6..697d5c2 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -284,7 +284,9 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm) rcu_read_lock(); list_for_each_entry_rcu(sdev, &svm->devs, list) { intel_flush_pasid_dev(svm, sdev, svm->pasid); - intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm); + /* for emulated iommu, PASID cache invalidation implies IOTLB/DTLB */ + if (!cap_caching_mode(svm->iommu->cap)) + intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm); } rcu_read_unlock(); -- 2.7.4