Commit beb2f447 authored by Wu Zongyong's avatar Wu Zongyong Committed by Pengyuan Zhao
Browse files

vp_vdpa: add vq irq offloading support 

stable inclusion
from stable-v5.16
commit 5bbfea1e
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5bbfea1eacdf584d0d159e38c01ee190162706d9



----------------------------------------------------------------------

This patch implements the get_vq_irq() callback for virtio pci devices
to allow irq offloading.

Signed-off-by: default avatarWu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/bb091e5505db704dd620f8854a7aebc921d2a752.1635493219.git.wuzongyong@linux.alibaba.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarPengyuan Zhao <zhaopengyuan@hisilicon.com>
parent eb98cd96

drivers/vdpa/virtio_pci/vp_vdpa.c

+12 −0
Original line number Diff line number Diff line
@@ -76,6 +76,17 @@ static u8 vp_vdpa_get_status(struct vdpa_device *vdpa) 
	return vp_modern_get_status(mdev);

}



static int vp_vdpa_get_vq_irq(struct vdpa_device *vdpa, u16 idx)

{

	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);

	int irq = vp_vdpa->vring[idx].irq;



	if (irq == VIRTIO_MSI_NO_VECTOR)

		return -EINVAL;



	return irq;

}



static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)

{

	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
@@ -391,6 +402,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = { 
	.get_config	= vp_vdpa_get_config,

	.set_config	= vp_vdpa_set_config,

	.set_config_cb  = vp_vdpa_set_config_cb,

	.get_vq_irq	= vp_vdpa_get_vq_irq,

};



static void vp_vdpa_free_irq_vectors(void *data)