iommu/amd: Allocate data structures to keep track of irq remapping tables (0ea2c422) · Commits · 戴 / test

drivers/iommu/amd_iommu_init.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -183,6 +183,12 @@ u16 *amd_iommu_alias_table;
		*/
		struct amd_iommu **amd_iommu_rlookup_table;

		/*
		* This table is used to find the irq remapping table for a given device id
		* quickly.
		*/
		struct irq_remap_table **irq_lookup_table;

		/*
		* AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap
		* to know which ones are already in use.
		@@ -1532,9 +1538,13 @@ static struct syscore_ops amd_iommu_syscore_ops = {

		static void __init free_on_init_error(void)
		{
		free_pages((unsigned long)irq_lookup_table,
		get_order(rlookup_table_size));

		if (amd_iommu_irq_cache) {
		kmem_cache_destroy(amd_iommu_irq_cache);
		amd_iommu_irq_cache = NULL;

		}

		amd_iommu_uninit_devices();
		@@ -1687,6 +1697,12 @@ static int __init early_amd_iommu_init(void)
		0, NULL);
		if (!amd_iommu_irq_cache)
		goto out;

		irq_lookup_table = (void *)__get_free_pages(
		GFP_KERNEL \| __GFP_ZERO,
		get_order(rlookup_table_size));
		if (!irq_lookup_table)
		goto out;
		}

		ret = init_memory_definitions(ivrs_base);

+9 −0

Original line number	Diff line number	Diff line
		@@ -175,6 +175,7 @@
		#define DEV_ENTRY_EX 0x67
		#define DEV_ENTRY_SYSMGT1 0x68
		#define DEV_ENTRY_SYSMGT2 0x69
		#define DEV_ENTRY_IRQ_TBL_EN 0x80
		#define DEV_ENTRY_INIT_PASS 0xb8
		#define DEV_ENTRY_EINT_PASS 0xb9
		#define DEV_ENTRY_NMI_PASS 0xba
		@@ -337,6 +338,14 @@ extern bool amd_iommu_iotlb_sup;
		#define MAX_IRQS_PER_TABLE 256
		#define IRQ_TABLE_ALIGNMENT 128

		struct irq_remap_table {
		spinlock_t lock;
		unsigned min_index;
		u32 *table;
		};

		extern struct irq_remap_table **irq_lookup_table;

		/* Interrupt remapping feature used? */
		extern bool amd_iommu_irq_remap;