search for: alloc_pages_exact

...@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > > info->num = num; > info->msix_vector = msix_vec; > + info->use_dma_api = vp_use_dma_api(); > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + if (info->use_dma_api) { > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, > + GFP_KERNEL); > + } else { > + info->que...

...@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > > info->num = num; > info->msix_vector = msix_vec; > + info->use_dma_api = vp_use_dma_api(); > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + if (info->use_dma_api) { > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, > + GFP_KERNEL); > + } else { > + info->que...

...@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > > info->num = num; > info->msix_vector = msix_vec; > + info->use_dma_api = vp_use_dma_api(); > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + if (info->use_dma_api) { > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, > + GFP_KERNEL); > + } else { > + info->que...

...@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > > info->num = num; > info->msix_vector = msix_vec; > + info->use_dma_api = vp_use_dma_api(); > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + if (info->use_dma_api) { > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, > + GFP_KERNEL); > + } else { > + info->que...

...> struct list_head node; > @@ -417,15 +418,16 @@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > info->num = num; > info->msix_vector = msix_vec; > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, GFP_KERNEL); > if (info->queue == NULL) { > err = -ENOMEM; > goto out_info; >...

...> struct list_head node; > @@ -417,15 +418,16 @@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, > info->num = num; > info->msix_vector = msix_vec; > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > + &info->queue_dma_addr, GFP_KERNEL); > if (info->queue == NULL) { > err = -ENOMEM; > goto out_info; >...

...gt; + > +int virtio_direct_mapping_error(struct device *hwdev, dma_addr_t dma_addr) > +{ > + return 0; > +} Including this one. > +void *virtio_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, > + gfp_t gfp, unsigned long attrs) > +{ > + void *queue = alloc_pages_exact(PAGE_ALIGN(size), gfp); > + > + if (queue) { > + phys_addr_t phys_addr = virt_to_phys(queue); > + *dma_handle = (dma_addr_t)phys_addr; > + > + if (WARN_ON_ONCE(*dma_handle != phys_addr)) { > + free_pages_exact(queue, PAGE_ALIGN(size)); > + return NULL; > + } >...

...*pdev) struct virtio_mmio_device *vm_dev; struct resource *mem; unsigned long magic; + int err; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) @@ -481,6 +484,15 @@ static int virtio_mmio_probe(struct platform_device *pdev) return -ENXIO; } + vm_dev->isr_mem = alloc_pages_exact(PAGE_SIZE, GFP_KERNEL|__GFP_ZERO); + if (vm_dev->isr_mem == NULL) { + dev_err(&pdev->dev, "Allocate isr memory failed!\n"); + return -ENOMEM; + } + + writel(virt_to_phys(vm_dev->isr_mem), + vm_dev->base + VIRTIO_MMIO_ISRMEM); + vm_dev->vdev.id.device = readl(...

...st char *name, @@ -416,21 +462,30 @@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, info->num = num; info->msix_vector = msix_vec; + info->use_dma_api = vp_use_dma_api(); - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); + if (info->use_dma_api) { + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, + &info->queue_dma_addr, + GFP_KERNEL); + } else { + info->queue = alloc_pages_exact(PAGE_ALIGN(s...

...irtio_device *vdev, unsigned index, >> >> info->num = num; >> info->msix_vector = msix_vec; >> + info->use_dma_api = vp_use_dma_api(); >> >> - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); >> - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); >> + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); >> + if (info->use_dma_api) { >> + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, >> + &info->queue...

...u; if (!vmx) return ERR_PTR(-ENOMEM); @@ -9559,6 +9598,17 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) goto free_msrs; loaded_vmcs_init(vmx->loaded_vmcs); + bytes = msr_autoload_count_max * sizeof(struct vmx_msr_entry); + vmx->msr_autoload.guest = alloc_pages_exact(bytes, + GFP_KERNEL | __GFP_ZERO); + if (!vmx->msr_autoload.guest) + goto free_vmcs; + + vmx->msr_autoload.host = alloc_pages_exact(bytes, + GFP_KERNEL | __GFP_ZERO); + if (!vmx->msr_autoload.guest) + goto free_autoload_guest; + cpu = get_cpu(); vmx_vcpu_load(&vm...

...(struct virtio_device *vdev, unsigned index, > > > > info->num = num; > > info->msix_vector = msix_vec; > > + info->use_dma_api = vp_use_dma_api(); > > > > - size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN)); > > - info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO); > > + size = vring_size(num, VIRTIO_PCI_VRING_ALIGN); > > + if (info->use_dma_api) { > > + info->queue = dma_zalloc_coherent(vdev->dev.parent, size, > > + &info->queue_dma_addr, > > + GFP_KERNEL); > > +...

...+ b/drivers/s390/virtio/virtio_ccw.c > @@ -516,17 +512,10 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev, > err = info->num; > goto out_err; > } > - size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN)); > - info->queue = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO); > - if (info->queue == NULL) { > - dev_warn(&vcdev->cdev->dev, "no queue\n"); > - err = -ENOMEM; > - goto out_err; > - } > + vq = vring_create_virtqueue(i, info->num, KVM_VIRTIO_CCW_RING_ALIGN, > + vdev, true,...

Hi all, this patch series introduces support for running Linux on top of Xen inside a virtual machine with virtio devices (nested virt scenario). The problem is that Linux virtio drivers use virt_to_phys to get the guest pseudo-physical addresses to pass to the backend, which doesn't work as expected on Xen. Switching the virtio drivers to the dma APIs (dma_alloc_coherent,

Hi all, this patch series introduces support for running Linux on top of Xen inside a virtual machine with virtio devices (nested virt scenario). The problem is that Linux virtio drivers use virt_to_phys to get the guest pseudo-physical addresses to pass to the backend, which doesn't work as expected on Xen. Switching the virtio drivers to the dma APIs (dma_alloc_coherent,

These patches are not ready to be merged because I was unable to measure a performance improvement. I'm publishing them so they are archived in case someone picks up this work again in the future. The goal of these patches is to allocate virtqueues and driver state from the device's NUMA node for optimal memory access latency. Only guests with a vNUMA topology and virtio devices spread

These patches are not ready to be merged because I was unable to measure a performance improvement. I'm publishing them so they are archived in case someone picks up this work again in the future. The goal of these patches is to allocate virtqueues and driver state from the device's NUMA node for optimal memory access latency. Only guests with a vNUMA topology and virtio devices spread

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

...tqueue *virtio_ccw_setup_vq(struct virtio_device *vdev, goto out_err; } info->num = virtio_ccw_read_vq_conf(vcdev, ccw, i); + if (info->num < 0) { + err = info->num; + goto out_err; + } size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN)); info->queue = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO); if (info->queue == NULL) { -- 2.3.8