search for: virtio_thinint_area

...> static void drop_airq_indicator(struct virtqueue *vq, struct airq_info *info) > { > unsigned long i, flags; > @@ -322,12 +347,12 @@ static void virtio_ccw_drop_indicator(struct virtio_ccw_device *vcdev, > { > int ret; > unsigned long *indicatorp = NULL; > - struct virtio_thinint_area *thinint_area = NULL; > + vc_dma_decl_struct(virtio_thinint_area, thinint_area) = NULL; > + dma_addr_t indicatorp_dma_addr; > struct airq_info *airq_info = vcdev->airq_info; > > if (vcdev->is_thinint) { > - thinint_area = kzalloc(sizeof(*thinint_area), > -...

Hi, here's the guest driver support for adapter interrupts in virtio-ccw. We use one summary indicator per page of indicators. For each device, we try to find a space in an indicator where all of its virtqueues fit. Locking probably needs some more love, but it seems to work fine so far. Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter

Hi, here's the guest driver support for adapter interrupts in virtio-ccw. We use one summary indicator per page of indicators. For each device, we try to find a space in an indicator where all of its virtqueues fit. Locking probably needs some more love, but it seems to work fine so far. Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter

Hi, next version of the guest exploitation of virtio-ccw adapter interrupts. Changes from the last version: - adapt to latest kvm-next - changed housekeeping for indicator locations: we now use cacheline-sized and aligned areas - minor tweaks Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter interrupt support. arch/s390/include/asm/irq.h

Hi, next version of the guest exploitation of virtio-ccw adapter interrupts. Changes from the last version: - adapt to latest kvm-next - changed housekeeping for indicator locations: we now use cacheline-sized and aligned areas - minor tweaks Cornelia Huck (2): KVM: s390: virtio-ccw: Handle command rejects. KVM: s390: virtio-ccw adapter interrupt support. arch/s390/include/asm/irq.h

...tio_ccw.c +++ b/drivers/s390/kvm/virtio_ccw.c @@ -55,6 +55,7 @@ struct virtio_ccw_device { struct ccw_device *cdev; __u32 curr_io; int err; + unsigned int revision; /* Transport revision */ wait_queue_head_t wait_q; spinlock_t lock; struct list_head virtqueues; @@ -86,6 +87,15 @@ struct virtio_thinint_area { u8 isc; } __packed; +struct virtio_rev_info { + __u16 revision; + __u16 length; + __u8 data[]; +}; + +/* the highest virtio-ccw revision we support */ +#define VIRTIO_CCW_REV_MAX 0 + struct virtio_ccw_vq_info { struct virtqueue *vq; int num; @@ -122,6 +132,7 @@ static struct airq_info *...

...rt_to_phys(info->info_block); err = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_VQ | i); if (err) { dev_warn(&vcdev->cdev->dev, "SET_VQ failed\n"); @@ -590,6 +590,7 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, { int ret; struct virtio_thinint_area *thinint_area = NULL; + unsigned long indicator_addr; struct airq_info *info; thinint_area = ccw_device_dma_zalloc(vcdev->cdev, @@ -599,21 +600,22 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, goto out; } /* Try to get an indicator. */ - thinint_area...

...rt_to_phys(info->info_block); err = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_VQ | i); if (err) { dev_warn(&vcdev->cdev->dev, "SET_VQ failed\n"); @@ -590,6 +590,7 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, { int ret; struct virtio_thinint_area *thinint_area = NULL; + unsigned long indicator_addr; struct airq_info *info; thinint_area = ccw_device_dma_zalloc(vcdev->cdev, @@ -599,21 +600,22 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, goto out; } /* Try to get an indicator. */ - thinint_area...

...irtio_device *vdev, if (vq) vring_del_virtqueue(vq); if (info) { - kfree(info->info_block); + vc_dma_free_struct(vdev, info->info_block); } kfree(info); return ERR_PTR(err); @@ -590,7 +609,7 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, struct virtio_thinint_area *thinint_area = NULL; struct airq_info *info; - thinint_area = kzalloc(sizeof(*thinint_area), GFP_DMA | GFP_KERNEL); + vc_dma_alloc_struct(&vcdev->vdev, thinint_area); if (!thinint_area) { ret = -ENOMEM; goto out; @@ -626,7 +645,7 @@ static int virtio_ccw_register_adapter_ind(str...

...irtio_device *vdev, if (vq) vring_del_virtqueue(vq); if (info) { - kfree(info->info_block); + vc_dma_free_struct(vdev, info->info_block); } kfree(info); return ERR_PTR(err); @@ -591,7 +610,7 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, struct virtio_thinint_area *thinint_area = NULL; struct airq_info *info; - thinint_area = kzalloc(sizeof(*thinint_area), GFP_DMA | GFP_KERNEL); + vc_dma_alloc_struct(&vcdev->vdev, thinint_area); if (!thinint_area) { ret = -ENOMEM; goto out; @@ -627,7 +646,7 @@ static int virtio_ccw_register_adapter_ind(str...

...irtio_device *vdev, if (vq) vring_del_virtqueue(vq); if (info) { - kfree(info->info_block); + vc_dma_free_struct(vdev, info->info_block); } kfree(info); return ERR_PTR(err); @@ -591,7 +610,7 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, struct virtio_thinint_area *thinint_area = NULL; struct airq_info *info; - thinint_area = kzalloc(sizeof(*thinint_area), GFP_DMA | GFP_KERNEL); + vc_dma_alloc_struct(&vcdev->vdev, thinint_area); if (!thinint_area) { ret = -ENOMEM; goto out; @@ -627,7 +646,7 @@ static int virtio_ccw_register_adapter_ind(str...

...ue(vq); if (info) { - kfree(info->info_block); + ccw_device_dma_free(vcdev->cdev, info->info_block, + sizeof(*info->info_block)); } kfree(info); return ERR_PTR(err); @@ -591,7 +597,8 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, struct virtio_thinint_area *thinint_area = NULL; struct airq_info *info; - thinint_area = kzalloc(sizeof(*thinint_area), GFP_DMA | GFP_KERNEL); + thinint_area = ccw_device_dma_zalloc(vcdev->cdev, + sizeof(*thinint_area)); if (!thinint_area) { ret = -ENOMEM; goto out; @@ -627,7 +634,7 @@ static int vir...

...ue(vq); if (info) { - kfree(info->info_block); + ccw_device_dma_free(vcdev->cdev, info->info_block, + sizeof(*info->info_block)); } kfree(info); return ERR_PTR(err); @@ -591,7 +597,8 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev, struct virtio_thinint_area *thinint_area = NULL; struct airq_info *info; - thinint_area = kzalloc(sizeof(*thinint_area), GFP_DMA | GFP_KERNEL); + thinint_area = ccw_device_dma_zalloc(vcdev->cdev, + sizeof(*thinint_area)); if (!thinint_area) { ret = -ENOMEM; goto out; @@ -627,7 +634,7 @@ static int vir...

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

This patchset tries to go towards implementing both virtio-1 compliant and transitional virtio drivers in Linux. Branch available at git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux virtio-1 This is based on some old patches by Rusty to handle extended feature bits and endianness conversions. Thomas implemented the new virtio-ccw transport revision command, and I hacked up some

This patchset tries to go towards implementing both virtio-1 compliant and transitional virtio drivers in Linux. Branch available at git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux virtio-1 This is based on some old patches by Rusty to handle extended feature bits and endianness conversions. Thomas implemented the new virtio-ccw transport revision command, and I hacked up some

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV

Enhanced virtualization protection technology may require the use of bounce buffers for I/O. While support for this was built into the virtio core, virtio-ccw wasn't changed accordingly. Some background on technology (not part of this series) and the terminology used. * Protected Virtualization (PV): Protected Virtualization guarantees, that non-shared memory of a guest that operates in PV