search for: vhost_iotlb_entry

...IOTLB_SIZE; i++) + dev->iotlb[i].flags.valid = VHOST_IOTLB_INVALID; } EXPORT_SYMBOL_GPL(vhost_dev_init); @@ -940,9 +956,10 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) { struct file *eventfp, *filep = NULL; struct eventfd_ctx *ctx = NULL; + struct vhost_iotlb_entry entry; u64 p; long r; - int i, fd; + int index, i, fd; /* If you are not the owner, you can become one */ if (ioctl == VHOST_SET_OWNER) { @@ -1008,6 +1025,80 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) if (filep) fput(filep); break; + case...

...IOTLB_SIZE; i++) + dev->iotlb[i].flags.valid = VHOST_IOTLB_INVALID; } EXPORT_SYMBOL_GPL(vhost_dev_init); @@ -940,9 +956,10 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) { struct file *eventfp, *filep = NULL; struct eventfd_ctx *ctx = NULL; + struct vhost_iotlb_entry entry; u64 p; long r; - int i, fd; + int index, i, fd; /* If you are not the owner, you can become one */ if (ioctl == VHOST_SET_OWNER) { @@ -1008,6 +1025,80 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) if (filep) fput(filep); break; + case...

...gs.valid = VHOST_IOTLB_INVALID; > } > EXPORT_SYMBOL_GPL(vhost_dev_init); > > @@ -940,9 +956,10 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) > { > struct file *eventfp, *filep = NULL; > struct eventfd_ctx *ctx = NULL; > + struct vhost_iotlb_entry entry; > u64 p; > long r; > - int i, fd; > + int index, i, fd; > > /* If you are not the owner, you can become one */ > if (ioctl == VHOST_SET_OWNER) { > @@ -1008,6 +1025,80 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) >...

...rgp) } else filep = eventfp; break; + case VHOST_SET_VRING_IOTLB_REQUEST: + r = -EFAULT; + if (copy_from_user(&e, argp, sizeof e)) + break; + if (!access_ok(VERIFY_WRITE, e.userspace_addr, + sizeof(*vq->iotlb_request))) + break; + r = 0; + vq->iotlb_request = (struct vhost_iotlb_entry __user *)e.userspace_addr; + break; + case VHOST_SET_VRING_IOTLB_CALL: + if (copy_from_user(&f, argp, sizeof f)) { + r = -EFAULT; + break; + } + eventfp = f.fd == -1 ? NULL : eventfd_fget(f.fd); + if (IS_ERR(eventfp)) { + r = PTR_ERR(eventfp); + break; + } + if (eventfp != vq-&gt...

...> + case VHOST_SET_VRING_IOTLB_REQUEST: > + r = -EFAULT; > + if (copy_from_user(&e, argp, sizeof e)) > + break; > + if (!access_ok(VERIFY_WRITE, e.userspace_addr, > + sizeof(*vq->iotlb_request))) > + break; > + r = 0; > + vq->iotlb_request = (struct vhost_iotlb_entry __user *)e.userspace_addr; > + break; > + case VHOST_SET_VRING_IOTLB_CALL: > + if (copy_from_user(&f, argp, sizeof f)) { > + r = -EFAULT; > + break; > + } > + eventfp = f.fd == -1 ? NULL : eventfd_fget(f.fd); > + if (IS_ERR(eventfp)) { > + r = PTR_ERR(event...

...> + case VHOST_SET_VRING_IOTLB_REQUEST: > + r = -EFAULT; > + if (copy_from_user(&e, argp, sizeof e)) > + break; > + if (!access_ok(VERIFY_WRITE, e.userspace_addr, > + sizeof(*vq->iotlb_request))) > + break; > + r = 0; > + vq->iotlb_request = (struct vhost_iotlb_entry __user *)e.userspace_addr; > + break; > + case VHOST_SET_VRING_IOTLB_CALL: > + if (copy_from_user(&f, argp, sizeof f)) { > + r = -EFAULT; > + break; > + } > + eventfp = f.fd == -1 ? NULL : eventfd_fget(f.fd); > + if (IS_ERR(eventfp)) { > + r = PTR_ERR(event...

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

...+++++++++------ > >> drivers/vhost/vhost.h | 17 ++- > >> fs/eventfd.c | 3 +- > >> include/uapi/linux/vhost.h | 35 ++++++ > >> 5 files changed, 320 insertions(+), 42 deletions(-) > >> > > [...] > > >> +struct vhost_iotlb_entry { > >> + __u64 iova; > >> + __u64 size; > >> + __u64 userspace_addr; > > Alignment requirements? > > The API does not require any alignment. Will add a comment for this. > > > > >> + struct { > >> +#define VHOST_ACCESS_RO 0x1...

...+++++++++------ > >> drivers/vhost/vhost.h | 17 ++- > >> fs/eventfd.c | 3 +- > >> include/uapi/linux/vhost.h | 35 ++++++ > >> 5 files changed, 320 insertions(+), 42 deletions(-) > >> > > [...] > > >> +struct vhost_iotlb_entry { > >> + __u64 iova; > >> + __u64 size; > >> + __u64 userspace_addr; > > Alignment requirements? > > The API does not require any alignment. Will add a comment for this. > > > > >> + struct { > >> +#define VHOST_ACCESS_RO 0x1...

...t.c | 301 +++++++++++++++++++++++++++++++++++++++------ >> drivers/vhost/vhost.h | 17 ++- >> fs/eventfd.c | 3 +- >> include/uapi/linux/vhost.h | 35 ++++++ >> 5 files changed, 320 insertions(+), 42 deletions(-) >> [...] >> +struct vhost_iotlb_entry { >> + __u64 iova; >> + __u64 size; >> + __u64 userspace_addr; > Alignment requirements? The API does not require any alignment. Will add a comment for this. > >> + struct { >> +#define VHOST_ACCESS_RO 0x1 >> +#define VHOST_ACCESS_WO 0x2 >&gt...

...;>>> drivers/vhost/vhost.h | 17 ++- >>>> fs/eventfd.c | 3 +- >>>> include/uapi/linux/vhost.h | 35 ++++++ >>>> 5 files changed, 320 insertions(+), 42 deletions(-) >>>> >> [...] >> >>>> +struct vhost_iotlb_entry { >>>> + __u64 iova; >>>> + __u64 size; >>>> + __u64 userspace_addr; >>> Alignment requirements? >> The API does not require any alignment. Will add a comment for this. >> >>>> + struct { >>>> +#define VHOST_ACCESS_RO...