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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/iommu/irq_remapping.c
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@@ -1,4 +1,4 @@
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-#include <linux/seq_file.h>
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+// SPDX-License-Identifier: GPL-2.0-only
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 #include <linux/cpumask.h>
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 #include <linux/kernel.h>
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 #include <linux/string.h>
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@@ -104,6 +104,9 @@
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 	else if (IS_ENABLED(CONFIG_AMD_IOMMU) &&
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 		 amd_iommu_irq_ops.prepare() == 0)
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 		remap_ops = &amd_iommu_irq_ops;
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+	else if (IS_ENABLED(CONFIG_HYPERV_IOMMU) &&
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+		 hyperv_irq_remap_ops.prepare() == 0)
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+		remap_ops = &hyperv_irq_remap_ops;
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 	else
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 		return -ENOSYS;
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@@ -157,33 +160,12 @@
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 }
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 /**
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- * irq_remapping_get_ir_irq_domain - Get the irqdomain associated with the IOMMU
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- *				     device serving request @info
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- * @info: interrupt allocation information, used to identify the IOMMU device
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- *
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- * It's used to get parent irqdomain for HPET and IOAPIC irqdomains.
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- * Returns pointer to IRQ domain, or NULL on failure.
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- */
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-struct irq_domain *
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-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
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-{
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-	if (!remap_ops || !remap_ops->get_ir_irq_domain)
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-		return NULL;
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-
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-	return remap_ops->get_ir_irq_domain(info);
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-}
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-
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-/**
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  * irq_remapping_get_irq_domain - Get the irqdomain serving the request @info
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  * @info: interrupt allocation information, used to identify the IOMMU device
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  *
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- * There will be one PCI MSI/MSIX irqdomain associated with each interrupt
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- * remapping device, so this interface is used to retrieve the PCI MSI/MSIX
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- * irqdomain serving request @info.
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  * Returns pointer to IRQ domain, or NULL on failure.
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  */
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-struct irq_domain *
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-irq_remapping_get_irq_domain(struct irq_alloc_info *info)
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+struct irq_domain *irq_remapping_get_irq_domain(struct irq_alloc_info *info)
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 {
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 	if (!remap_ops || !remap_ops->get_irq_domain)
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 		return NULL;