search for: gup_flags

...ocess_iotlb_update(struct vhost_vdpa *v, > struct vhost_dev *dev = &v->vdev; > struct vhost_iotlb *iotlb = dev->iotlb; > struct page **page_list; > - struct vm_area_struct **vmas; > + unsigned long list_size = PAGE_SIZE / sizeof(struct page *); > unsigned int gup_flags = FOLL_LONGTERM; > - unsigned long map_pfn, last_pfn = 0; > - unsigned long npages, lock_limit; > - unsigned long i, nmap = 0; > + unsigned long npages, cur_base, map_pfn, last_pfn = 0; > + unsigned long locked, lock_limit, pinned, i; > u64 iova = msg->iova; > - long pinn...

...594,19 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v, struct vhost_dev *dev = &v->vdev; struct vhost_iotlb *iotlb = dev->iotlb; struct page **page_list; - unsigned long list_size = PAGE_SIZE / sizeof(struct page *); + struct vm_area_struct **vmas; unsigned int gup_flags = FOLL_LONGTERM; - unsigned long npages, cur_base, map_pfn, last_pfn = 0; - unsigned long locked, lock_limit, pinned, i; + unsigned long map_pfn, last_pfn = 0; + unsigned long npages, lock_limit; + unsigned long i, nmap = 0; u64 iova = msg->iova; + long pinned; int ret = 0; if (vhost_iot...

...594,19 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v, struct vhost_dev *dev = &v->vdev; struct vhost_iotlb *iotlb = dev->iotlb; struct page **page_list; - unsigned long list_size = PAGE_SIZE / sizeof(struct page *); + struct vm_area_struct **vmas; unsigned int gup_flags = FOLL_LONGTERM; - unsigned long npages, cur_base, map_pfn, last_pfn = 0; - unsigned long locked, lock_limit, pinned, i; + unsigned long map_pfn, last_pfn = 0; + unsigned long npages, lock_limit; + unsigned long i, nmap = 0; u64 iova = msg->iova; + long pinned; int ret = 0; if (vhost_iot...

...32]; > + unsigned long max_pages_per_loop = ARRAY_SIZE(pages); > + > + /* Only care about states >= S3 */ > + if (state < PM_SUSPEND_MEM) > + return; > + > + rcu_read_lock(); > + for_each_process(p) { > + int gup_flags = FOLL_WRITE; > + > + mm = p->mm; > + if (!mm) > + continue; > + > + down_read(&mm->mmap_sem); Blocking actions, such as locking semaphores, are forbidden in RCU read-side critical sections. Also, from a mo...

...ions(+), 2 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 3fab94f88894..6a9fcaf1831d 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -609,8 +609,10 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v, > gup_flags |= FOLL_WRITE; > > npages = PAGE_ALIGN(msg->size + (iova & ~PAGE_MASK)) >> PAGE_SHIFT; > - if (!npages) > - return -EINVAL; > + if (!npages) { > + ret = -EINVAL; > + goto free_page; > + } > > mmap_read_lock(dev->mm); > > @@ -666,...

...., memory that is accessible from both the device and - the CPU - config FRAME_VECTOR bool diff --git a/mm/gup.c b/mm/gup.c index ddde097cf9e4..fe131d879c70 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -605,13 +605,6 @@ static int get_gate_page(struct mm_struct *mm, unsigned long address, if ((gup_flags & FOLL_DUMP) || !is_zero_pfn(pte_pfn(*pte))) goto unmap; *page = pte_page(*pte); - - /* - * This should never happen (a device public page in the gate - * area). - */ - if (is_device_public_page(*page)) - goto unmap; } if (unlikely(!try_get_page(*page))) { ret = -ENOMEM;...

Hi All: This series tries to add the support for control virtqueue in vDPA. Control virtqueue is used by networking device for accepting various commands from the driver. It's a must to support multiqueue and other configurations. When used by vhost-vDPA bus driver for VM, the control virtqueue should be shadowed via userspace VMM (Qemu) instead of being assigned directly to Guest. This is

Hi All: This series tries to add the support for control virtqueue in vDPA. Control virtqueue is used by networking device for accepting various commands from the driver. It's a must to support multiqueue and other configurations. When used by vhost-vDPA bus driver for VM, the control virtqueue should be shadowed via userspace VMM (Qemu) instead of being assigned directly to Guest. This is

Hi Dan, Jérôme and Jason, below is a series that cleans up the dev_pagemap interface so that it is more easily usable, which removes the need to wrap it in hmm and thus allowing to kill a lot of code Note: this series is on top of Linux 5.2-rc5 and has some minor conflicts with the hmm tree that are easy to resolve. Diffstat summary: 32 files changed, 361 insertions(+), 1012 deletions(-) Git

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place