From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELvknqTB8elkU+X1UIJeRrpf/WS8r4AUGnN9rkOQED50REw0M/6qs1m14tYrvX/6rpk2g8jZ ARC-Seal: i=1; a=rsa-sha256; t=1521774611; cv=none; d=google.com; s=arc-20160816; b=JOfiPtI/GBEFYM78ib2zfxn87JADrh2sO3Oxn0uHYACxG37y48L4wiXORnWfI2iPpS FgXCRoGAooMTcVYu2JQtWLdYnmvtCXw+eEemNGGrKH/S5YXkqm7HBgS8s5ElUwNnpwZ4 QfUqf7zbAaR/v5/mgyMsE48iFUbdLFzoeAIZalsB+56vYnZ9e97CfDXLSpIOZGkTH02y oBzB+RIhWQtyrEQzRak+RLA6kPHxRcG6iU8kEt1YY4bUIOJ+mW1NzaPlm+PiIaQuXfc/ RLu7e7YYRvg+9DPsNp1ZusFJOg9jki8M6aNOJZPfe+gxXjrIK6SbXP39kDER2HWHx4yK qwLg== 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=I17bvL4mHfp9JyBslnOuAkoaRiXOtoJonfB8y3fqFbc=; b=z1Cw9v8mAkuynb1WG36hKj+Ir0KeqadjrkSgjjkHGrjWQfTgUnHsyqZnhOroYVKSw8 au/faeNBohnPyFneJwLbkor81Xah2HG0f+1fa+MHxsaNHWxXSJWvJaouSmhbX5AbH7wm PB5zVfqfSHGH1kPR/VUYInqD4V+GqtA6bZgyGa/ttkrRLui35ul0w5HdiXTyquwGhu/L m841wAyNNDeQ8I75nFMmxYQPZ0y0l9eMnZVWG0g2oCHXDlfKTNz9yfg6GCC5Pv+yP3gC RGb8mxJPTeTyXlYJpYo5MTQ8/8Pl3juV8cV/FHet18nECXhIJGQwxLK2Yxs/f3k9z8IX YlfA== 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 134.134.136.65 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 134.134.136.65 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="5.48,348,1517904000"; d="scan'208";a="26316042" From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse , Jean-Philippe Brucker , Greg Kroah-Hartman , Rafael Wysocki Cc: "Liu, Yi L" , Lan Tianyu , "Tian, Kevin" , Raj Ashok , Alex Williamson , Jean Delvare , "Christoph Hellwig" , Jacob Pan Subject: [PATCH v4 19/22] iommu/intel-svm: do not flush iotlb for viommu Date: Thu, 22 Mar 2018 20:12:11 -0700 Message-Id: <1521774734-48433-20-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521774734-48433-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1521774734-48433-1-git-send-email-jacob.jun.pan@linux.intel.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595696335099299638?= X-GMAIL-MSGID: =?utf-8?q?1595696335099299638?= 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 3a7bc77..66b8e10 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