From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D741610F2 for ; Mon, 14 Nov 2022 01:47:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668390469; x=1699926469; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IyTuYPrNYIXcLY03KDjNi2jgFamisN6EaEiSZ9Xh4MM=; b=nBXe9Mw82gWlB0AEFHpToihDRjTZNgFgfQisZVIz9UPEeQh2k2J6Ilpu FvvtszNXDHDV6WqpWwrpVT29yB6Lo4UWog21l2+NmvF/pVdY4nmJIlo0J /tp8MaMAWqI6oDde/J1S5oBQVjCEF4q3DreLrUngkzuSCeuN0FLBCcrNI 7JLhT5bLH55OZzc3VF/leXGw8da5CUHHATNjFK46944+MBFxMy3rGqCMU DTE0n4ABif9IGSWWCY5rzIF1PRIz5XfZqVEroV+HtER5tLjpCJ41zFC9e fUdgCmNMB58QzV1LYgrz+nnUwT48olHv7CbdDml1ICdBd+vftGA34vp/K g==; X-IronPort-AV: E=McAfee;i="6500,9779,10530"; a="398151491" X-IronPort-AV: E=Sophos;i="5.96,161,1665471600"; d="scan'208";a="398151491" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2022 17:47:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10530"; a="707124199" X-IronPort-AV: E=Sophos;i="5.96,161,1665471600"; d="scan'208";a="707124199" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga004.fm.intel.com with ESMTP; 13 Nov 2022 17:47:47 -0800 From: Lu Baolu To: iommu@lists.linux.dev Cc: Joerg Roedel , Kevin Tian , Will Deacon , Robin Murphy , Liu Yi L , Jacob jun Pan , linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v3 1/7] iommu/vt-d: Allocate pasid table in device probe path Date: Mon, 14 Nov 2022 09:40:43 +0800 Message-Id: <20221114014049.3959-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221114014049.3959-1-baolu.lu@linux.intel.com> References: <20221114014049.3959-1-baolu.lu@linux.intel.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Whether or not a domain is attached to the device, the pasid table should always be valid as long as it has been probed. This moves the pasid table allocation from the domain attaching device path to device probe path and frees it in the device release path. Signed-off-by: Lu Baolu Reviewed-by: Kevin Tian --- drivers/iommu/intel/iommu.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index f298e51d5aa6..bc42a2c84e2a 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -2477,13 +2477,6 @@ static int domain_add_dev_info(struct dmar_domain *domain, struct device *dev) /* PASID table is mandatory for a PCI device in scalable mode. */ if (sm_supported(iommu) && !dev_is_real_dma_subdevice(dev)) { - ret = intel_pasid_alloc_table(dev); - if (ret) { - dev_err(dev, "PASID table allocation failed\n"); - dmar_remove_one_dev_info(dev); - return ret; - } - /* Setup the PASID entry for requests without PASID: */ if (hw_pass_through && domain_type_is_si(domain)) ret = intel_pasid_setup_pass_through(iommu, domain, @@ -4108,7 +4101,6 @@ static void dmar_remove_one_dev_info(struct device *dev) iommu_disable_dev_iotlb(info); domain_context_clear(info); - intel_pasid_free_table(info->dev); } spin_lock_irqsave(&domain->lock, flags); @@ -4466,6 +4458,7 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev) struct device_domain_info *info; struct intel_iommu *iommu; u8 bus, devfn; + int ret; iommu = device_to_iommu(dev, &bus, &devfn); if (!iommu || !iommu->iommu.ops) @@ -4509,6 +4502,16 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev) dev_iommu_priv_set(dev, info); + if (sm_supported(iommu) && !dev_is_real_dma_subdevice(dev)) { + ret = intel_pasid_alloc_table(dev); + if (ret) { + dev_err(dev, "PASID table allocation failed\n"); + dev_iommu_priv_set(dev, NULL); + kfree(info); + return ERR_PTR(ret); + } + } + return &iommu->iommu; } @@ -4517,6 +4520,7 @@ static void intel_iommu_release_device(struct device *dev) struct device_domain_info *info = dev_iommu_priv_get(dev); dmar_remove_one_dev_info(dev); + intel_pasid_free_table(dev); dev_iommu_priv_set(dev, NULL); kfree(info); set_dma_ops(dev, NULL); -- 2.34.1