Hi,
On 4/22/21 2:10 PM, Jason Gunthorpe wrote:
> On Thu, Apr 22, 2021 at 08:34:32AM +, Tian, Kevin wrote:
>
>> The shim layer could be considered as a new iommu backend in VFIO,
>> which connects VFIO iommu ops to the internal helpers in
>> drivers/ioasid.
>
> It may be the best we can do
29.04.2021 08:51, Krishna Reddy пишет:
> Hi Dmitry,
>
>> Thank you for the answer. Could you please give more information about:
>> 1) Are you on software or hardware team, or both?
>
> I am in the software team and has contributed to initial Tegra SMMU driver in
> the downstream along with
On 4/29/21 1:28 AM, Christoph Hellwig wrote:
> If the user already specified a swiotlb size on the command line,
> swiotlb_adjust_size shoul not overwrite it.
>
> Fixes: 2cbc2776efe4 ("swiotlb: remove swiotlb_nr_tbl")
> Reported-by: Tom Lendacky
Thanks, Christoph!
Tested-by: Tom Lendacky
>
On Thu, Apr 29, 2021 at 08:45:51AM -0500, Tom Lendacky wrote:
> On 4/29/21 1:28 AM, Christoph Hellwig wrote:
> > If the user already specified a swiotlb size on the command line,
> > swiotlb_adjust_size shoul not overwrite it.
> >
> > Fixes: 2cbc2776efe4 ("swiotlb: remove swiotlb_nr_tbl")
> >
On Thu, Apr 29, 2021 at 03:26:55PM +0200, Auger Eric wrote:
> From the pseudo code,
>
> gpa_ioasid_id = ioctl(ioasid_fd, CREATE_IOASID, ..)
> ioctl(ioasid_fd, SET_IOASID_PAGE_TABLES, ..)
>
> I fail to understand whether the SET_IOASID_PAGE_TABLES would apply to
> the whole IOASIDs within
Hi,
On 4/22/21 2:10 PM, Jason Gunthorpe wrote:
> On Thu, Apr 22, 2021 at 08:34:32AM +, Tian, Kevin wrote:
>
>> The shim layer could be considered as a new iommu backend in VFIO,
>> which connects VFIO iommu ops to the internal helpers in
>> drivers/ioasid.
>
> It may be the best we can do
Hi,
On 4/23/21 1:49 PM, Jason Gunthorpe wrote:
> On Fri, Apr 23, 2021 at 09:06:44AM +, Tian, Kevin wrote:
>
>> Or could we still have just one /dev/ioasid but allow userspace to create
>> multiple gpa_ioasid_id's each associated to a different iommu domain?
>> Then the compatibility check
If the user already specified a swiotlb size on the command line,
swiotlb_adjust_size shoul not overwrite it.
Fixes: 2cbc2776efe4 ("swiotlb: remove swiotlb_nr_tbl")
Reported-by: Tom Lendacky
Signed-off-by: Christoph Hellwig
---
kernel/dma/swiotlb.c | 2 ++
1 file changed, 2 insertions(+)
diff
