forked from luck/tmp_suning_uos_patched
iommu/amd: Use iommu core for passthrough mode
Remove the AMD IOMMU driver implementation for passthrough mode and rely on the new iommu core features for that. Signed-off-by: Joerg Roedel <jroedel@suse.de>
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parent
55c99a4dc5
commit
1e6a7b04c0
@ -76,8 +76,6 @@ LIST_HEAD(hpet_map);
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* Domain for untranslated devices - only allocated
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* if iommu=pt passed on kernel cmd line.
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*/
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static struct protection_domain *pt_domain;
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static const struct iommu_ops amd_iommu_ops;
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static ATOMIC_NOTIFIER_HEAD(ppr_notifier);
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@ -96,7 +94,7 @@ struct iommu_dev_data {
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struct protection_domain *domain; /* Domain the device is bound to */
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u16 devid; /* PCI Device ID */
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bool iommu_v2; /* Device can make use of IOMMUv2 */
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bool passthrough; /* Default for device is pt_domain */
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bool passthrough; /* Device is identity mapped */
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struct {
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bool enabled;
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int qdep;
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@ -116,7 +114,6 @@ struct iommu_cmd {
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struct kmem_cache *amd_iommu_irq_cache;
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static void update_domain(struct protection_domain *domain);
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static int alloc_passthrough_domain(void);
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static int protection_domain_init(struct protection_domain *domain);
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/****************************************************************************
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@ -2221,15 +2218,6 @@ static void __detach_device(struct iommu_dev_data *dev_data)
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do_detach(head);
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spin_unlock_irqrestore(&domain->lock, flags);
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/*
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* If we run in passthrough mode the device must be assigned to the
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* passthrough domain if it is detached from any other domain.
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* Make sure we can deassign from the pt_domain itself.
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*/
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if (dev_data->passthrough &&
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(dev_data->domain == NULL && domain != pt_domain))
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__attach_device(dev_data, pt_domain);
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}
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/*
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@ -2287,7 +2275,7 @@ static int amd_iommu_add_device(struct device *dev)
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BUG_ON(!dev_data);
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if (dev_data->iommu_v2)
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if (iommu_pass_through || dev_data->iommu_v2)
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iommu_request_dm_for_dev(dev);
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/* Domains are initialized for this device - have a look what we ended up with */
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@ -2947,21 +2935,6 @@ static struct protection_domain *protection_domain_alloc(void)
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return NULL;
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}
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static int alloc_passthrough_domain(void)
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{
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if (pt_domain != NULL)
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return 0;
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/* allocate passthrough domain */
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pt_domain = protection_domain_alloc();
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if (!pt_domain)
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return -ENOMEM;
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pt_domain->mode = PAGE_MODE_NONE;
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return 0;
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}
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static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
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{
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struct protection_domain *pdomain;
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@ -3222,33 +3195,6 @@ static const struct iommu_ops amd_iommu_ops = {
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*
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*****************************************************************************/
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int __init amd_iommu_init_passthrough(void)
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{
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struct iommu_dev_data *dev_data;
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struct pci_dev *dev = NULL;
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int ret;
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ret = alloc_passthrough_domain();
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if (ret)
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return ret;
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for_each_pci_dev(dev) {
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if (!check_device(&dev->dev))
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continue;
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dev_data = get_dev_data(&dev->dev);
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dev_data->passthrough = true;
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attach_device(&dev->dev, pt_domain);
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}
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amd_iommu_stats_init();
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pr_info("AMD-Vi: Initialized for Passthrough Mode\n");
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return 0;
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}
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/* IOMMUv2 specific functions */
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int amd_iommu_register_ppr_notifier(struct notifier_block *nb)
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{
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@ -2026,14 +2026,6 @@ static bool detect_ivrs(void)
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return true;
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}
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static int amd_iommu_init_dma(void)
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{
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if (iommu_pass_through)
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return amd_iommu_init_passthrough();
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else
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return amd_iommu_init_dma_ops();
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}
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/****************************************************************************
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*
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* AMD IOMMU Initialization State Machine
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@ -2073,7 +2065,7 @@ static int __init state_next(void)
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init_state = ret ? IOMMU_INIT_ERROR : IOMMU_INTERRUPTS_EN;
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break;
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case IOMMU_INTERRUPTS_EN:
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ret = amd_iommu_init_dma();
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ret = amd_iommu_init_dma_ops();
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init_state = ret ? IOMMU_INIT_ERROR : IOMMU_DMA_OPS;
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break;
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case IOMMU_DMA_OPS:
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