Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966231AbcLMUrI (ORCPT ); Tue, 13 Dec 2016 15:47:08 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55514 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938383AbcLMUcQ (ORCPT ); Tue, 13 Dec 2016 15:32:16 -0500 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org, punit.agrawal@arm.com, diana.craciun@nxp.com, gpkulkarni@gmail.com, shankerd@codeaurora.org, bharat.bhushan@nxp.com Subject: [RFC v4 08/16] iommu/vt-d: Implement reserved region get/put callbacks Date: Tue, 13 Dec 2016 20:30:26 +0000 Message-Id: <1481661034-3088-9-git-send-email-eric.auger@redhat.com> In-Reply-To: <1481661034-3088-1-git-send-email-eric.auger@redhat.com> References: <1481661034-3088-1-git-send-email-eric.auger@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 13 Dec 2016 20:31:35 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2912 Lines: 89 This patch registers the [0xfee00000 - 0xfeefffff] 1MB MSI range as a reserved region. This will allow to report that range in the iommu-group sysfs. Signed-off-by: Eric Auger --- RFCv2 -> RFCv3: - use get/put_resv_region callbacks. RFC v1 -> RFC v2: - fix intel_iommu_add_reserved_regions name - use IOAPIC_RANGE_START and IOAPIC_RANGE_END defines - return if the MSI region is already registered; --- drivers/iommu/intel-iommu.c | 50 +++++++++++++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index d8376c2..06c447a 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5196,6 +5196,28 @@ static void intel_iommu_remove_device(struct device *dev) iommu_device_unlink(iommu->iommu_dev, dev); } +static void intel_iommu_get_resv_regions(struct device *device, + struct list_head *head) +{ + struct iommu_resv_region *reg; + + reg = iommu_alloc_resv_region(IOAPIC_RANGE_START, + IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1, + 0, IOMMU_RESV_NOMAP); + if (!reg) + return; + list_add_tail(®->list, head); +} + +static void intel_iommu_put_resv_regions(struct device *dev, + struct list_head *head) +{ + struct iommu_resv_region *entry, *next; + + list_for_each_entry_safe(entry, next, head, list) + kfree(entry); +} + #ifdef CONFIG_INTEL_IOMMU_SVM int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev) { @@ -5305,19 +5327,21 @@ struct intel_iommu *intel_svm_device_to_iommu(struct device *dev) #endif /* CONFIG_INTEL_IOMMU_SVM */ static const struct iommu_ops intel_iommu_ops = { - .capable = intel_iommu_capable, - .domain_alloc = intel_iommu_domain_alloc, - .domain_free = intel_iommu_domain_free, - .attach_dev = intel_iommu_attach_device, - .detach_dev = intel_iommu_detach_device, - .map = intel_iommu_map, - .unmap = intel_iommu_unmap, - .map_sg = default_iommu_map_sg, - .iova_to_phys = intel_iommu_iova_to_phys, - .add_device = intel_iommu_add_device, - .remove_device = intel_iommu_remove_device, - .device_group = pci_device_group, - .pgsize_bitmap = INTEL_IOMMU_PGSIZES, + .capable = intel_iommu_capable, + .domain_alloc = intel_iommu_domain_alloc, + .domain_free = intel_iommu_domain_free, + .attach_dev = intel_iommu_attach_device, + .detach_dev = intel_iommu_detach_device, + .map = intel_iommu_map, + .unmap = intel_iommu_unmap, + .map_sg = default_iommu_map_sg, + .iova_to_phys = intel_iommu_iova_to_phys, + .add_device = intel_iommu_add_device, + .remove_device = intel_iommu_remove_device, + .get_resv_regions = intel_iommu_get_resv_regions, + .put_resv_regions = intel_iommu_put_resv_regions, + .device_group = pci_device_group, + .pgsize_bitmap = INTEL_IOMMU_PGSIZES, }; static void quirk_iommu_g4x_gfx(struct pci_dev *dev) -- 1.9.1