From patchwork Tue Jan 30 08:08:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolu Lu X-Patchwork-Id: 13536963 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 002BC57883; Tue, 30 Jan 2024 08:14:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706602460; cv=none; b=BOTziin8/zRpp1qLw58kbwtLR/Fm0SM0+81CEZringGNLrZv+xxHLAffef5yZUCDkgE+ADuGgwwBZSuCy1t5wflRpvvSzJunW/h9M9J/+EHi0o+mMZadv2vo/X+G1K7xd5H3X6tdkYeFBeLTIgxEO3gZZ8gqlkCOk6qEAgexLmo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706602460; c=relaxed/simple; bh=bQjTjgCLfYsPH5p+7Al5Zy19r6O5Dl9UPL8NgLDT+B4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ecKApa6qFDdw29NF9f3OeMOq2WxZKFvzU+4ZnwTF9U12q2iD2tVTeQbDKlj0e7t9cam7X5smZMoTzTcfH+UA760zv0IVyp0hnz1TxRGmppuZagS/DCe050Jkt2tbMyPMaS36nXSVjqvSX7JYjKqXAtcuLRHmK8fCQDCJ887cMJo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=LoztytLW; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="LoztytLW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706602459; x=1738138459; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=bQjTjgCLfYsPH5p+7Al5Zy19r6O5Dl9UPL8NgLDT+B4=; b=LoztytLWLkOeyPaFxoh7qV0SdfsUsG5GAnYtDmIbn3AuV4b5z8KV6pFD 80hxyjhfZtu5Vtt/lKlQTXR9mR4e923KXWeP6lCytTONHjl8eOZ5xT1MU xaa1aILI0HcJoy0dDqQwzdxYknbsCjaI7wgaIQlciHMs3R7PyLk/PT+h2 aNF5Y0mx5jtC8nw1YNE2B5Ow0NmJnS+KEhKN8X56mKC3jaETlQX53rQZj 2LsQtBvvPByiYH1vAt96lEGgtPj1lMszFqibnjHIT7SzsLD7gWgb6w1Xr RHKs2plQllUNWesH/ISutgU09w002rwsIlA14VLLyOk3y2QPWEYj9Ls/C A==; X-IronPort-AV: E=McAfee;i="6600,9927,10968"; a="10588206" X-IronPort-AV: E=Sophos;i="6.05,707,1701158400"; d="scan'208";a="10588206" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jan 2024 00:14:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,707,1701158400"; d="scan'208";a="3633717" Received: from allen-box.sh.intel.com ([10.239.159.127]) by fmviesa003.fm.intel.com with ESMTP; 30 Jan 2024 00:14:15 -0800 From: Lu Baolu To: Joerg Roedel , Will Deacon , Robin Murphy , Jason Gunthorpe , Kevin Tian , Jean-Philippe Brucker , Nicolin Chen Cc: Yi Liu , Jacob Pan , Longfang Liu , Yan Zhao , Joel Granados , iommu@lists.linux.dev, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu , Jason Gunthorpe Subject: [PATCH v11 02/16] iommu/arm-smmu-v3: Remove unrecoverable faults reporting Date: Tue, 30 Jan 2024 16:08:21 +0800 Message-Id: <20240130080835.58921-3-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240130080835.58921-1-baolu.lu@linux.intel.com> References: <20240130080835.58921-1-baolu.lu@linux.intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 No device driver registers fault handler to handle the reported unrecoveraable faults. Remove it to avoid dead code. Signed-off-by: Lu Baolu Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Tested-by: Longfang Liu --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 46 ++++++--------------- 1 file changed, 13 insertions(+), 33 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 0ffb1cf17e0b..4cf1054ed321 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -1461,7 +1461,6 @@ arm_smmu_find_master(struct arm_smmu_device *smmu, u32 sid) static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt) { int ret; - u32 reason; u32 perm = 0; struct arm_smmu_master *master; bool ssid_valid = evt[0] & EVTQ_0_SSV; @@ -1471,16 +1470,9 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt) switch (FIELD_GET(EVTQ_0_ID, evt[0])) { case EVT_ID_TRANSLATION_FAULT: - reason = IOMMU_FAULT_REASON_PTE_FETCH; - break; case EVT_ID_ADDR_SIZE_FAULT: - reason = IOMMU_FAULT_REASON_OOR_ADDRESS; - break; case EVT_ID_ACCESS_FAULT: - reason = IOMMU_FAULT_REASON_ACCESS; - break; case EVT_ID_PERMISSION_FAULT: - reason = IOMMU_FAULT_REASON_PERMISSION; break; default: return -EOPNOTSUPP; @@ -1490,6 +1482,9 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt) if (evt[1] & EVTQ_1_S2) return -EFAULT; + if (!(evt[1] & EVTQ_1_STALL)) + return -EOPNOTSUPP; + if (evt[1] & EVTQ_1_RnW) perm |= IOMMU_FAULT_PERM_READ; else @@ -1501,32 +1496,17 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt) if (evt[1] & EVTQ_1_PnU) perm |= IOMMU_FAULT_PERM_PRIV; - if (evt[1] & EVTQ_1_STALL) { - flt->type = IOMMU_FAULT_PAGE_REQ; - flt->prm = (struct iommu_fault_page_request) { - .flags = IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE, - .grpid = FIELD_GET(EVTQ_1_STAG, evt[1]), - .perm = perm, - .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]), - }; + flt->type = IOMMU_FAULT_PAGE_REQ; + flt->prm = (struct iommu_fault_page_request) { + .flags = IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE, + .grpid = FIELD_GET(EVTQ_1_STAG, evt[1]), + .perm = perm, + .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]), + }; - if (ssid_valid) { - flt->prm.flags |= IOMMU_FAULT_PAGE_REQUEST_PASID_VALID; - flt->prm.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]); - } - } else { - flt->type = IOMMU_FAULT_DMA_UNRECOV; - flt->event = (struct iommu_fault_unrecoverable) { - .reason = reason, - .flags = IOMMU_FAULT_UNRECOV_ADDR_VALID, - .perm = perm, - .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]), - }; - - if (ssid_valid) { - flt->event.flags |= IOMMU_FAULT_UNRECOV_PASID_VALID; - flt->event.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]); - } + if (ssid_valid) { + flt->prm.flags |= IOMMU_FAULT_PAGE_REQUEST_PASID_VALID; + flt->prm.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]); } mutex_lock(&smmu->streams_mutex);