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| author |   Feng Wu <feng.wu@intel.com> | 2015-09-18 22:29:50 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 15:06:50 +0200 |
| commit | 6d7425f109d2629d1f4b4b146eca8e43701bf966 (patch) | |
| tree | d061a775ff497fbb9ca59a577dab070a0c376748 /drivers/vfio/pci | |
| parent | KVM: make kvm_set_msi_irq() public (diff) | |
| download | linux-dev-6d7425f109d2629d1f4b4b146eca8e43701bf966.tar.xz linux-dev-6d7425f109d2629d1f4b4b146eca8e43701bf966.zip | |
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: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'drivers/vfio/pci')
| -rw-r--r-- | drivers/vfio/pci/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_intrs.c | 9 | ||||
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_private.h | 2 |
3 files changed, 12 insertions, 0 deletions
diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 579d83bf5358..02912f180c6d 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -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. diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 1f577b4ac126..3b3ba15558b7 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -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; diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h index ae0e1b4c1711..0e7394f8f69b 100644 --- a/drivers/vfio/pci/vfio_pci_private.h +++ b/drivers/vfio/pci/vfio_pci_private.h @@ -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 { |