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Commit 72fe00f0 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Use threaded interupt handler 



Move the interupt handling for the iommu into the interupt
thread to reduce latencies and prepare interupt handling for
pri handling.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 604c307b

arch/x86/include/asm/amd_iommu_proto.h

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 


extern int amd_iommu_init_dma_ops(void);

extern int amd_iommu_init_passthrough(void);

extern irqreturn_t amd_iommu_int_thread(int irq, void *data);

extern irqreturn_t amd_iommu_int_handler(int irq, void *data);

extern void amd_iommu_apply_erratum_63(u16 devid);

extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);

arch/x86/kernel/amd_iommu.c

+6 −1
Original line number Diff line number Diff line
@@ -366,7 +366,7 @@ static void iommu_poll_events(struct amd_iommu *iommu) 
	spin_unlock_irqrestore(&iommu->lock, flags);

}



irqreturn_t amd_iommu_int_handler(int irq, void *data)

irqreturn_t amd_iommu_int_thread(int irq, void *data)

{

	struct amd_iommu *iommu;
@@ -376,6 +376,11 @@ irqreturn_t amd_iommu_int_handler(int irq, void *data) 
	return IRQ_HANDLED;

}



irqreturn_t amd_iommu_int_handler(int irq, void *data)

{

	return IRQ_WAKE_THREAD;

}



/****************************************************************************

 *

 * IOMMU command queuing functions

arch/x86/kernel/amd_iommu_init.c

+5 −4
Original line number Diff line number Diff line
@@ -1034,10 +1034,11 @@ static int iommu_setup_msi(struct amd_iommu *iommu) 
	if (pci_enable_msi(iommu->dev))

		return 1;



	r = request_irq(iommu->dev->irq, amd_iommu_int_handler,

			IRQF_SAMPLE_RANDOM,

			"AMD-Vi",

			NULL);

	r = request_threaded_irq(iommu->dev->irq,

				 amd_iommu_int_handler,

				 amd_iommu_int_thread,

				 0, "AMD-Vi",

				 iommu->dev);



	if (r) {

		pci_disable_msi(iommu->dev);