| Message ID | 20171006133203.22803-26-jean-philippe.brucker@arm.com |
|---|---|
| State | Not Applicable |
| Headers | show
Return-Path: <linux-pci-owner@vger.kernel.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=<UNKNOWN>) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7r9B0yjJz9t34 for <incoming@patchwork.ozlabs.org>; Sat, 7 Oct 2017 00:30:06 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752509AbdJFNaC (ORCPT <rfc822;incoming@patchwork.ozlabs.org>); Fri, 6 Oct 2017 09:30:02 -0400 Received: from foss.arm.com ([217.140.101.70]:32882 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752376AbdJFNaA (ORCPT <rfc822;linux-pci@vger.kernel.org>); Fri, 6 Oct 2017 09:30:00 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2B9651435; Fri, 6 Oct 2017 06:30:00 -0700 (PDT) Received: from e106794-lin.cambridge.arm.com (e106794-lin.cambridge.arm.com [10.1.211.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 490A73F578; Fri, 6 Oct 2017 06:29:55 -0700 (PDT) From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> To: linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux-foundation.org Cc: joro@8bytes.org, robh+dt@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, hanjun.guo@linaro.org, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, robin.murphy@arm.com, bhelgaas@google.com, alex.williamson@redhat.com, tn@semihalf.com, liubo95@huawei.com, thunder.leizhen@huawei.com, xieyisheng1@huawei.com, gabriele.paoloni@huawei.com, nwatters@codeaurora.org, okaya@codeaurora.org, rfranz@cavium.com, dwmw2@infradead.org, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, ashok.raj@intel.com, robdclark@gmail.com Subject: [RFCv2 PATCH 25/36] iommu/arm-smmu-v3: Use shared ASID set Date: Fri, 6 Oct 2017 14:31:52 +0100 Message-Id: <20171006133203.22803-26-jean-philippe.brucker@arm.com> X-Mailer: git-send-email 2.13.3 In-Reply-To: <20171006133203.22803-1-jean-philippe.brucker@arm.com> References: <20171006133203.22803-1-jean-philippe.brucker@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: <linux-pci.vger.kernel.org> X-Mailing-List: linux-pci@vger.kernel.org |
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Process management for IOMMU + SVM for SMMUv3
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diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index e89e6d1263d9..b7355630526a 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1240,7 +1240,8 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_domain *smmu_domain, CTXDESC_CD_0_ENDI | #endif CTXDESC_CD_0_R | CTXDESC_CD_0_A | - CTXDESC_CD_0_ASET_PRIVATE | + (ssid ? CTXDESC_CD_0_ASET_SHARED : + CTXDESC_CD_0_ASET_PRIVATE) | CTXDESC_CD_0_AA64 | (u64)cd->asid << CTXDESC_CD_0_ASID_SHIFT | CTXDESC_CD_0_V;
We now have two exclusive sets of ASIDs: private and shared. SMMUv3 allows for contexts to take part in distributed TLB maintenance via the ASET bit. When this bit is 0 for a given context, TLB entries tagged with its ASID are invalidated by broadcast TLB maintenance. Set ASET=0 for process contexts. Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> --- drivers/iommu/arm-smmu-v3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)