On Mon, 2 Nov 2020 18:44:11 +0100
Paolo Bonzini wrote:
> On 02/11/20 18:37, Alex Williamson wrote:
> > I think we still have the issue at the vfio ioctl which takes __u64 iova
> > and size parameters, in bytes. Therefore we cannot unmap an entire
> > 64-bit address space with a single ioctl
On 02/11/20 18:37, Alex Williamson wrote:
> I think we still have the issue at the vfio ioctl which takes __u64 iova
> and size parameters, in bytes. Therefore we cannot unmap an entire
> 64-bit address space with a single ioctl call. We'd need to make use
> of a flag to modify the ioctl
On Fri, 30 Oct 2020 19:19:14 +0100
Paolo Bonzini wrote:
> On 30/10/20 18:26, Alex Williamson wrote:
> >>
> >> if (try_unmap) {
> >> +if (llsize == int128_2_64()) {
> >> +/* The unmap ioctl doesn't accept a full 64-bit span. */
> >> +llsize =
On 30/10/20 18:26, Alex Williamson wrote:
>>
>> if (try_unmap) {
>> +if (llsize == int128_2_64()) {
>> +/* The unmap ioctl doesn't accept a full 64-bit span. */
>> +llsize = int128_rshift(llsize, 1);
>> +ret = vfio_dma_unmap(container, iova,
On Fri, 30 Oct 2020 06:25:34 -0400
"Michael S. Tsirkin" wrote:
> On Thu, Oct 08, 2020 at 03:22:14PM -0600, Alex Williamson wrote:
> > On Thu, 8 Oct 2020 19:15:58 +0200
> > Jean-Philippe Brucker wrote:
> >
> > > IOMMUs may declare memory regions spanning from 0 to UINT64_MAX. When
> > >
On Thu, Oct 08, 2020 at 03:22:14PM -0600, Alex Williamson wrote:
> On Thu, 8 Oct 2020 19:15:58 +0200
> Jean-Philippe Brucker wrote:
>
> > IOMMUs may declare memory regions spanning from 0 to UINT64_MAX. When
> > attempting to deal with such region, vfio_listener_region_del() passes a
> > size
Hi Jean,
On 10/8/20 7:15 PM, Jean-Philippe Brucker wrote:
> IOMMUs may declare memory regions spanning from 0 to UINT64_MAX. When
> attempting to deal with such region, vfio_listener_region_del() passes a
> size of 2^64 to int128_get64() which throws an assertion failure. Even
> ignoring this,
On Thu, 8 Oct 2020 19:15:58 +0200
Jean-Philippe Brucker wrote:
> IOMMUs may declare memory regions spanning from 0 to UINT64_MAX. When
> attempting to deal with such region, vfio_listener_region_del() passes a
> size of 2^64 to int128_get64() which throws an assertion failure. Even
> ignoring
IOMMUs may declare memory regions spanning from 0 to UINT64_MAX. When
attempting to deal with such region, vfio_listener_region_del() passes a
size of 2^64 to int128_get64() which throws an assertion failure. Even
ignoring this, the VFIO_IOMMU_DMA_MAP ioctl cannot handle this size
since the size
