Hi Michael, Just a ping on this patch. Would appreciate your review when you get a chance.
Thanks > On 2 Jan 2026, at 12:27, Kommula Shiva Shankar <[email protected]> wrote: > > Prioritize security for external emails: > Confirm sender and content safety before clicking links or opening attachments > Report Suspicious > Explicitly set non-cached caching attributes for MMIO regions. > Default write-back mode can cause CPU to cache device memory, > causing invalid reads and unpredictable behavior. > > Invalid read and write issues were observed on ARM64 when mapping the > notification area to userspace via mmap. > > Signed-off-by: Kommula Shiva Shankar <[email protected]> > Acked-by: Jason Wang <[email protected]> > --- > Originally sent to net-next, now redirected to vhost tree > per Jason Wang's suggestion. > > drivers/vhost/vdpa.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 05a481e4c385..b0179e8567ab 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -1527,6 +1527,7 @@ static int vhost_vdpa_mmap(struct file *file, struct > vm_area_struct *vma) > if (vma->vm_end - vma->vm_start != notify.size) > return -ENOTSUPP; > > + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); > vm_flags_set(vma, VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP); > vma->vm_ops = &vhost_vdpa_vm_ops; > return 0; > -- > 2.48.1 > > > >
