search for: memory_size

...last); + addr, last); if (node == NULL || node->start > addr) { vhost_iotlb_miss(vq, addr, access); return false; @@ -1455,7 +1454,7 @@ static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m) region->guest_phys_addr, region->memory_size, region->guest_phys_addr + - region->memory_size - 1, + region->memory_size, region->userspace_addr, VHOST_ACCESS_RW)) goto err; @@ -2055,7 +2054,7 @@ static int translate_desc(struct vhost_virtqueue *vq, u64 addr, u32 len, } node = vhost_umem_...

..._base, struct vhost_umem *umem, int log_all) { - int i; + struct vhost_umem_node *node; - if (!mem) + if (!umem) return 0; - for (i = 0; i < mem->nregions; ++i) { - struct vhost_memory_region *m = mem->regions + i; - unsigned long a = m->userspace_addr; - if (m->memory_size > ULONG_MAX) + list_for_each_entry(node, &umem->umem_list, link) { + unsigned long a = node->userspace_addr; + + if (node->size > ULONG_MAX) return 0; else if (!access_ok(VERIFY_WRITE, (void __user *)a, - m->memory_size)) + node->size)) return 0;...

..._base, struct vhost_umem *umem, int log_all) { - int i; + struct vhost_umem_node *node; - if (!mem) + if (!umem) return 0; - for (i = 0; i < mem->nregions; ++i) { - struct vhost_memory_region *m = mem->regions + i; - unsigned long a = m->userspace_addr; - if (m->memory_size > ULONG_MAX) + list_for_each_entry(node, &umem->umem_list, link) { + unsigned long a = node->userspace_addr; + + if (node->size > ULONG_MAX) return 0; else if (!access_ok(VERIFY_WRITE, (void __user *)a, - m->memory_size)) + node->size)) return 0;...

..._base, struct vhost_umem *umem, int log_all) { - int i; + struct vhost_umem_node *node; - if (!mem) + if (!umem) return 0; - for (i = 0; i < mem->nregions; ++i) { - struct vhost_memory_region *m = mem->regions + i; - unsigned long a = m->userspace_addr; - if (m->memory_size > ULONG_MAX) + list_for_each_entry(node, &umem->umem_list, link) { + unsigned long a = node->userspace_addr; + + if (node->size > ULONG_MAX) return 0; else if (!access_ok(VERIFY_WRITE, (void __user *)a, - m->memory_size)) + node->size)) return 0;...

...{ > - int i; > + struct vhost_umem_node *node; > > - if (!mem) > + if (!umem) > return 0; > > - for (i = 0; i < mem->nregions; ++i) { > - struct vhost_memory_region *m = mem->regions + i; > - unsigned long a = m->userspace_addr; > - if (m->memory_size > ULONG_MAX) > + list_for_each_entry(node, &umem->umem_list, link) { > + unsigned long a = node->userspace_addr; > + > + if (node->size > ULONG_MAX) > return 0; > else if (!access_ok(VERIFY_WRITE, (void __user *)a, > - m->memory_size)) >...

...{ > - int i; > + struct vhost_umem_node *node; > > - if (!mem) > + if (!umem) > return 0; > > - for (i = 0; i < mem->nregions; ++i) { > - struct vhost_memory_region *m = mem->regions + i; > - unsigned long a = m->userspace_addr; > - if (m->memory_size > ULONG_MAX) > + list_for_each_entry(node, &umem->umem_list, link) { > + unsigned long a = node->userspace_addr; > + > + if (node->size > ULONG_MAX) > return 0; > else if (!access_ok(VERIFY_WRITE, (void __user *)a, > - m->memory_size)) >...

...{ > - int i; > + struct vhost_umem_node *node; > > - if (!mem) > + if (!umem) > return 0; > > - for (i = 0; i < mem->nregions; ++i) { > - struct vhost_memory_region *m = mem->regions + i; > - unsigned long a = m->userspace_addr; > - if (m->memory_size > ULONG_MAX) > + list_for_each_entry(node, &umem->umem_list, link) { > + unsigned long a = node->userspace_addr; > + > + if (node->size > ULONG_MAX) > return 0; > else if (!access_ok(VERIFY_WRITE, (void __user *)a, > - m->memory_size)) >...

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - Fill the translation request in a preset userspace address (This

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - Fill the translation request in a preset userspace address (This

...nd device mutex. */ +static int vq_memory_access_ok(struct vhost_virtqueue *vq, struct vhost_memory *mem, + int log_all) +{ + int i; + for (i = 0; i < mem->nregions; ++i) { + struct vhost_memory_region *m = mem->regions + i; + unsigned long a = m->userspace_addr; + if (m->memory_size > ULONG_MAX) + return 0; + else if (!access_ok(VERIFY_WRITE, (void __user *)a, + m->memory_size)) + return 0; + else if (log_all && !log_access_ok(vq->log_base, + m->guest_phys_addr, + m->memory_size)) + return 0; + } + return 1; +} + +/* Can we...

...nd device mutex. */ +static int vq_memory_access_ok(struct vhost_virtqueue *vq, struct vhost_memory *mem, + int log_all) +{ + int i; + for (i = 0; i < mem->nregions; ++i) { + struct vhost_memory_region *m = mem->regions + i; + unsigned long a = m->userspace_addr; + if (m->memory_size > ULONG_MAX) + return 0; + else if (!access_ok(VERIFY_WRITE, (void __user *)a, + m->memory_size)) + return 0; + else if (log_all && !log_access_ok(vq->log_base, + m->guest_phys_addr, + m->memory_size)) + return 0; + } + return 1; +} + +/* Can we...

...fault empty mapping. */ + memory = kmalloc(offsetof(struct vhost_memory, regions), GFP_KERNEL); if (!memory) return -ENOMEM; vhost_dev_cleanup(dev); - memory->nregions = 2; - memory->regions[0].guest_phys_addr = 1; - memory->regions[0].userspace_addr = 1; - memory->regions[0].memory_size = ~0ULL; - memory->regions[1].guest_phys_addr = 0; - memory->regions[1].userspace_addr = 0; - memory->regions[1].memory_size = 1; + memory->nregions = 0; dev->memory = memory; return 0; } -- 1.6.6.rc1.43.gf55cc

...fault empty mapping. */ + memory = kmalloc(offsetof(struct vhost_memory, regions), GFP_KERNEL); if (!memory) return -ENOMEM; vhost_dev_cleanup(dev); - memory->nregions = 2; - memory->regions[0].guest_phys_addr = 1; - memory->regions[0].userspace_addr = 1; - memory->regions[0].memory_size = ~0ULL; - memory->regions[1].guest_phys_addr = 0; - memory->regions[1].userspace_addr = 0; - memory->regions[1].memory_size = 1; + memory->nregions = 0; dev->memory = memory; return 0; } -- 1.6.6.rc1.43.gf55cc

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - when there's a IOTLB miss, it will notify userspace through

This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace IOMMU implementation (qemu) for a secure DMA environment (DMAR) in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translation, this is done through: - when there's a IOTLB miss, it will notify userspace through

...emory *mem, +static int vq_memory_access_ok(void __user *log_base, struct vhost_memory *mem, int log_all) { int i; @@ -242,7 +242,7 @@ static int vq_memory_access_ok(struct vhost_virtqueue *vq, struct vhost_memory * else if (!access_ok(VERIFY_WRITE, (void __user *)a, m->memory_size)) return 0; - else if (log_all && !log_access_ok(vq->log_base, + else if (log_all && !log_access_ok(log_base, m->guest_phys_addr, m->memory_size)) return 0; @@ -259,9 +259,10 @@ static int memory_access_ok(struct vhost_dev *d, struct vhost_memo...

...emory *mem, +static int vq_memory_access_ok(void __user *log_base, struct vhost_memory *mem, int log_all) { int i; @@ -242,7 +242,7 @@ static int vq_memory_access_ok(struct vhost_virtqueue *vq, struct vhost_memory * else if (!access_ok(VERIFY_WRITE, (void __user *)a, m->memory_size)) return 0; - else if (log_all && !log_access_ok(vq->log_base, + else if (log_all && !log_access_ok(log_base, m->guest_phys_addr, m->memory_size)) return 0; @@ -259,9 +259,10 @@ static int memory_access_ok(struct vhost_dev *d, struct vhost_memo...

...gt; - > for (region = newmem->regions; > region < newmem->regions + mem.nregions; > region++) { > - node = vhost_kvzalloc(sizeof(*node)); > - if (!node) > + if (vhost_new_umem_range(newumem, > + region->guest_phys_addr, > + region->memory_size, > + region->guest_phys_addr + > + region->memory_size - 1, > + region->userspace_addr, > + VHOST_ACCESS_RW)) > goto err; > - node->start = region->guest_phys_addr; > - node->size = region->memory_size; > - node->last...

...gt; - > for (region = newmem->regions; > region < newmem->regions + mem.nregions; > region++) { > - node = vhost_kvzalloc(sizeof(*node)); > - if (!node) > + if (vhost_new_umem_range(newumem, > + region->guest_phys_addr, > + region->memory_size, > + region->guest_phys_addr + > + region->memory_size - 1, > + region->userspace_addr, > + VHOST_ACCESS_RW)) > goto err; > - node->start = region->guest_phys_addr; > - node->size = region->memory_size; > - node->last...

...INIT_LIST_HEAD(&newumem->umem_list); - for (region = newmem->regions; region < newmem->regions + mem.nregions; region++) { - node = vhost_kvzalloc(sizeof(*node)); - if (!node) + if (vhost_new_umem_range(newumem, + region->guest_phys_addr, + region->memory_size, + region->guest_phys_addr + + region->memory_size - 1, + region->userspace_addr, + VHOST_ACCESS_RW)) goto err; - node->start = region->guest_phys_addr; - node->size = region->memory_size; - node->last = node->start + node->size - 1; -...