From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC493C33CB7 for ; Wed, 29 Jan 2020 05:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BAB35207FF for ; Wed, 29 Jan 2020 05:56:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726245AbgA2F4q (ORCPT ); Wed, 29 Jan 2020 00:56:46 -0500 Received: from mga02.intel.com ([134.134.136.20]:33109 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725816AbgA2F4n (ORCPT ); Wed, 29 Jan 2020 00:56:43 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Jan 2020 21:56:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,376,1574150400"; d="scan'208";a="222346533" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga008.jf.intel.com with ESMTP; 28 Jan 2020 21:56:41 -0800 From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , "Lu Baolu" , Joerg Roedel , David Woodhouse Cc: "Yi Liu" , "Tian, Kevin" , Raj Ashok , Alex Williamson , "Christoph Hellwig" , Jean-Philippe Brucker , Jonathan Cameron , Eric Auger , Jacob Pan Subject: [PATCH V9 07/10] iommu/vt-d: Cache virtual command capability register Date: Tue, 28 Jan 2020 22:01:50 -0800 Message-Id: <1580277713-66934-8-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1580277713-66934-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1580277713-66934-1-git-send-email-jacob.jun.pan@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Virtual command registers are used in the guest only, to prevent vmexit cost, we cache the capability and store it during initialization. Signed-off-by: Jacob Pan --- drivers/iommu/dmar.c | 1 + include/linux/intel-iommu.h | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 206733ec8140..fd35e625f315 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -953,6 +953,7 @@ static int map_iommu(struct intel_iommu *iommu, u64 phys_addr) warn_invalid_dmar(phys_addr, " returns all ones"); goto unmap; } + iommu->vccap = dmar_readq(iommu->reg + DMAR_VCCAP_REG); /* the registers might be more than one page */ map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap), diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index dd9fa61689bc..4a8bf3b11de6 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -192,6 +192,9 @@ #define ecap_max_handle_mask(e) ((e >> 20) & 0xf) #define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */ +/* Virtual command interface capabilities */ +#define vccap_pasid(v) ((v & DMA_VCS_PAS)) /* PASID allocation */ + /* IOTLB_REG */ #define DMA_TLB_FLUSH_GRANU_OFFSET 60 #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60) @@ -285,6 +288,7 @@ /* PRS_REG */ #define DMA_PRS_PPR ((u32)1) +#define DMA_VCS_PAS ((u64)1) #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \ do { \ @@ -535,6 +539,7 @@ struct intel_iommu { u64 reg_size; /* size of hw register set */ u64 cap; u64 ecap; + u64 vccap; u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */ raw_spinlock_t register_lock; /* protect register handling */ int seq_id; /* sequence id of the iommu */ -- 2.7.4