On Mon, Jan 20, 2025 at 01:57:36PM +0100, David Hildenbrand wrote:
> > I don't want to overload those APIs, I prefer to see a new API that is
> > just about splitting areas. Splitting is a special operation that can
> > fail depending on driver support.
>
> So we'd just always perform a split-befo
On Wed, Jan 15, 2025 at 02:39:55PM +1100, Alexey Kardashevskiy wrote:
> > The thread was talking about the built-in support in iommufd to split
> > mappings.
>
> Just to clarify - I am talking about splitting only "iommufd areas", not
> large pages.
In generality it is the same thing as you canno
On 11/1/25 01:14, Jason Gunthorpe wrote:
On Fri, Jan 10, 2025 at 02:45:39PM +0100, David Hildenbrand wrote:
In your commit I read:
"Implement the cut operation to be hitless, changes to the page table
during cutting must cause zero disruption to any ongoing DMA. This is the
expectation of the
On Fri, Jan 10, 2025 at 02:45:39PM +0100, David Hildenbrand wrote:
>
> In your commit I read:
>
> "Implement the cut operation to be hitless, changes to the page table
> during cutting must cause zero disruption to any ongoing DMA. This is the
> expectation of the VFIO type 1 uAPI. Hitless requir
On 10.01.25 15:14, Jason Gunthorpe wrote:
On Fri, Jan 10, 2025 at 02:45:39PM +0100, David Hildenbrand wrote:
In your commit I read:
"Implement the cut operation to be hitless, changes to the page table
during cutting must cause zero disruption to any ongoing DMA. This is the
expectation of the
On 10.01.25 14:20, Jason Gunthorpe wrote:
Thanks for your reply, I knew CCing you would be very helpful :)
On Fri, Jan 10, 2025 at 09:26:02AM +0100, David Hildenbrand wrote:
One limitation (also discussed in the guest_memfd
meeting) is that VFIO expects the DMA mapping for
a specific IOVA to b
On Fri, Jan 10, 2025 at 09:26:02AM +0100, David Hildenbrand wrote:
> > > > > > > > > > One limitation (also discussed in the guest_memfd
> > > > > > > > > > meeting) is that VFIO expects the DMA mapping for
> > > > > > > > > > a specific IOVA to be mapped and unmapped with the
> > > > > > > > > > s
On 10.01.25 08:06, Chenyi Qiang wrote:
On 1/10/2025 9:42 AM, Alexey Kardashevskiy wrote:
On 9/1/25 19:49, Chenyi Qiang wrote:
On 1/9/2025 4:18 PM, Alexey Kardashevskiy wrote:
On 9/1/25 18:52, Chenyi Qiang wrote:
On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
On 8/1/25 17:28, Ch
On 1/10/2025 9:42 AM, Alexey Kardashevskiy wrote:
>
>
> On 9/1/25 19:49, Chenyi Qiang wrote:
>>
>>
>> On 1/9/2025 4:18 PM, Alexey Kardashevskiy wrote:
>>>
>>>
>>> On 9/1/25 18:52, Chenyi Qiang wrote:
On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
>
>
> On 8/1/25 17
On 9/1/25 19:49, Chenyi Qiang wrote:
On 1/9/2025 4:18 PM, Alexey Kardashevskiy wrote:
On 9/1/25 18:52, Chenyi Qiang wrote:
On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
On 8/1/25 17:28, Chenyi Qiang wrote:
Thanks Alexey for your review!
On 1/8/2025 12:47 PM, Alexey Kardashevski
On 1/9/2025 4:18 PM, Alexey Kardashevskiy wrote:
>
>
> On 9/1/25 18:52, Chenyi Qiang wrote:
>>
>>
>> On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
>>>
>>>
>>> On 8/1/25 17:28, Chenyi Qiang wrote:
Thanks Alexey for your review!
On 1/8/2025 12:47 PM, Alexey Kardashevskiy wrote:
On 9/1/25 18:52, Chenyi Qiang wrote:
On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
On 8/1/25 17:28, Chenyi Qiang wrote:
Thanks Alexey for your review!
On 1/8/2025 12:47 PM, Alexey Kardashevskiy wrote:
On 13/12/24 18:08, Chenyi Qiang wrote:
Commit 852f0048f3 ("RAMBlock: make guest_m
On 1/8/2025 7:38 PM, Alexey Kardashevskiy wrote:
>
>
> On 8/1/25 17:28, Chenyi Qiang wrote:
>> Thanks Alexey for your review!
>>
>> On 1/8/2025 12:47 PM, Alexey Kardashevskiy wrote:
>>> On 13/12/24 18:08, Chenyi Qiang wrote:
Commit 852f0048f3 ("RAMBlock: make guest_memfd require uncoordin
On 8/1/25 17:28, Chenyi Qiang wrote:
Thanks Alexey for your review!
On 1/8/2025 12:47 PM, Alexey Kardashevskiy wrote:
On 13/12/24 18:08, Chenyi Qiang wrote:
Commit 852f0048f3 ("RAMBlock: make guest_memfd require uncoordinated
discard") effectively disables device assignment when using guest
Thanks Alexey for your review!
On 1/8/2025 12:47 PM, Alexey Kardashevskiy wrote:
> On 13/12/24 18:08, Chenyi Qiang wrote:
>> Commit 852f0048f3 ("RAMBlock: make guest_memfd require uncoordinated
>> discard") effectively disables device assignment when using guest_memfd.
>> This poses a significant
On 13/12/24 18:08, Chenyi Qiang wrote:
Commit 852f0048f3 ("RAMBlock: make guest_memfd require uncoordinated
discard") effectively disables device assignment when using guest_memfd.
This poses a significant challenge as guest_memfd is essential for
confidential guests, thereby blocking device assi
Commit 852f0048f3 ("RAMBlock: make guest_memfd require uncoordinated
discard") effectively disables device assignment when using guest_memfd.
This poses a significant challenge as guest_memfd is essential for
confidential guests, thereby blocking device assignment to these VMs.
The initial rational
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