Hi Ashish, non-technical comment: in the subject, you might want to
s/SWIOTBL/SWIOTLB .
cheers,
Guilherme
On Tue, Nov 17, 2020 at 07:04:59PM +, Kalra, Ashish wrote:
> Hello Konrad,
>
> Actually I didn’t get that, do you mean you are taking 1G and <=4G cases out
> of the patch and only going to apply the >4G case as part of the patch ?
That was the thought, but now I am wondering how TDX is going
Hello Konrad,
On Tue, Nov 17, 2020 at 12:00:03PM -0500, Konrad Rzeszutek Wilk wrote:
> .snip..
> > > > > Lets break this down:
> > > > >
> > > > > How does the performance improve for one single device if you
> > > > > increase the SWIOTLB?
> > > > > Is there a specific device/driver that you c
.snip..
> > > > Lets break this down:
> > > >
> > > > How does the performance improve for one single device if you increase
> > > > the SWIOTLB?
> > > > Is there a specific device/driver that you can talk about that improve
> > > > with this patch?
> > > >
> > > >
> > >
> > > Yes, these are
On Fri, Nov 13, 2020 at 04:19:25PM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 05, 2020 at 09:20:45PM +, Ashish Kalra wrote:
> > On Thu, Nov 05, 2020 at 03:20:07PM -0500, Konrad Rzeszutek Wilk wrote:
> > > On Thu, Nov 05, 2020 at 07:38:28PM +, Ashish Kalra wrote:
> > > > On Thu, Nov 0
Hello Konrad,
On Fri, Nov 13, 2020 at 04:19:25PM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 05, 2020 at 09:20:45PM +, Ashish Kalra wrote:
> > On Thu, Nov 05, 2020 at 03:20:07PM -0500, Konrad Rzeszutek Wilk wrote:
> > > On Thu, Nov 05, 2020 at 07:38:28PM +, Ashish Kalra wrote:
> > >
On Thu, Nov 05, 2020 at 09:20:45PM +, Ashish Kalra wrote:
> On Thu, Nov 05, 2020 at 03:20:07PM -0500, Konrad Rzeszutek Wilk wrote:
> > On Thu, Nov 05, 2020 at 07:38:28PM +, Ashish Kalra wrote:
> > > On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> > > > .
> > > > > >
On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> .
> > > Right, so I am wondering if we can do this better.
> > >
> > > That is you are never going to get any 32-bit devices with SEV right? That
> > > is there is nothing that bounds you to always use the memory below 4GB?
>
On Thu, Nov 05, 2020 at 03:20:07PM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 05, 2020 at 07:38:28PM +, Ashish Kalra wrote:
> > On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> > > .
> > > > > Right, so I am wondering if we can do this better.
> > > > >
> > > > >
On Thu, Nov 05, 2020 at 07:38:28PM +, Ashish Kalra wrote:
> On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> > .
> > > > Right, so I am wondering if we can do this better.
> > > >
> > > > That is you are never going to get any 32-bit devices with SEV right?
> > > > Tha
On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> .
> > > Right, so I am wondering if we can do this better.
> > >
> > > That is you are never going to get any 32-bit devices with SEV right? That
> > > is there is nothing that bounds you to always use the memory below 4GB?
>
.
> > Right, so I am wondering if we can do this better.
> >
> > That is you are never going to get any 32-bit devices with SEV right? That
> > is there is nothing that bounds you to always use the memory below 4GB?
> >
>
> We do support 32-bit PCIe passthrough devices with SEV.
Ewww.. Which d
Hello Konrad,
On Thu, Nov 05, 2020 at 12:43:17PM -0500, Konrad Rzeszutek Wilk wrote:
> On Wed, Nov 04, 2020 at 10:39:13PM +, Ashish Kalra wrote:
> > Hello Konrad,
> >
> > On Wed, Nov 04, 2020 at 05:14:52PM -0500, Konrad Rzeszutek Wilk wrote:
> > > On Wed, Nov 04, 2020 at 10:08:04PM +, Ash
On Wed, Nov 04, 2020 at 10:39:13PM +, Ashish Kalra wrote:
> Hello Konrad,
>
> On Wed, Nov 04, 2020 at 05:14:52PM -0500, Konrad Rzeszutek Wilk wrote:
> > On Wed, Nov 04, 2020 at 10:08:04PM +, Ashish Kalra wrote:
> > > From: Ashish Kalra
> > >
> > > For SEV, all DMA to and from guest has t
Hello Konrad,
On Wed, Nov 04, 2020 at 05:14:52PM -0500, Konrad Rzeszutek Wilk wrote:
> On Wed, Nov 04, 2020 at 10:08:04PM +, Ashish Kalra wrote:
> > From: Ashish Kalra
> >
> > For SEV, all DMA to and from guest has to use shared
> > (un-encrypted) pages. SEV uses SWIOTLB to make this
> > hap
On Wed, Nov 04, 2020 at 10:08:04PM +, Ashish Kalra wrote:
> From: Ashish Kalra
>
> For SEV, all DMA to and from guest has to use shared
> (un-encrypted) pages. SEV uses SWIOTLB to make this
> happen without requiring changes to device drivers.
> However, depending on workload being run, the d
From: Ashish Kalra
For SEV, all DMA to and from guest has to use shared
(un-encrypted) pages. SEV uses SWIOTLB to make this
happen without requiring changes to device drivers.
However, depending on workload being run, the default
64MB of SWIOTLB might not be enough and SWIOTLB
may run out of buff
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