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Commit 6d7425f1 authored by Feng Wu's avatar Feng Wu Committed by Paolo Bonzini
Browse files

vfio: Register/unregister irq_bypass_producer 



This patch adds the registration/unregistration of an
irq_bypass_producer for MSI/MSIx on vfio pci devices.

Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d84f1e07

drivers/vfio/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -33,3 +33,4 @@ menuconfig VFIO 


source "drivers/vfio/pci/Kconfig"

source "drivers/vfio/platform/Kconfig"

source "virt/lib/Kconfig"

drivers/vfio/pci/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ config VFIO_PCI 
	tristate "VFIO support for PCI devices"

	depends on VFIO && PCI && EVENTFD

	select VFIO_VIRQFD

	select IRQ_BYPASS_MANAGER

	help

	  Support for the PCI VFIO bus driver.  This is required to make

	  use of PCI drivers using the VFIO framework.

drivers/vfio/pci/vfio_pci_intrs.c

+9 −0
Original line number Diff line number Diff line
@@ -319,6 +319,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, 


	if (vdev->ctx[vector].trigger) {

		free_irq(irq, vdev->ctx[vector].trigger);

		irq_bypass_unregister_producer(&vdev->ctx[vector].producer);

		kfree(vdev->ctx[vector].name);

		eventfd_ctx_put(vdev->ctx[vector].trigger);

		vdev->ctx[vector].trigger = NULL;
@@ -360,6 +361,14 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev, 
		return ret;

	}



	vdev->ctx[vector].producer.token = trigger;

	vdev->ctx[vector].producer.irq = irq;

	ret = irq_bypass_register_producer(&vdev->ctx[vector].producer);

	if (unlikely(ret))

		dev_info(&pdev->dev,

		"irq bypass producer (token %p) registration fails: %d\n",

		vdev->ctx[vector].producer.token, ret);



	vdev->ctx[vector].trigger = trigger;



	return 0;

drivers/vfio/pci/vfio_pci_private.h

+2 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 


#include <linux/mutex.h>

#include <linux/pci.h>

#include <linux/irqbypass.h>



#ifndef VFIO_PCI_PRIVATE_H

#define VFIO_PCI_PRIVATE_H
@@ -29,6 +30,7 @@ struct vfio_pci_irq_ctx { 
	struct virqfd		*mask;

	char			*name;

	bool			masked;

	struct irq_bypass_producer	producer;

};



struct vfio_pci_device {