On Wed, Dec 16, 2020 at 10:07:31PM +, Radev, Martin wrote:
> Hello everybody,
>
> I will try help clarify some things.
>
> > On a DMA unmap SWIOTLB (when force is used) it trusts the driver from
> > providing
> > the correct DMA address and length which SWIOTLB uses to match to its
> >
On Thu, Dec 17, 2020 at 12:19:16PM +0800, Jason Wang wrote:
>
> On 2020/12/16 下午9:04, Konrad Rzeszutek Wilk wrote:
> > On December 16, 2020 1:41:48 AM EST, Jason Wang wrote:
> > >
> > > - Original Message -
> > > >
> > > > - Original Message -
> > > > > .snip.
> > > > > > > >
On Mon, Dec 14, 2020 at 04:49:50PM -0500, Konrad Rzeszutek Wilk wrote:
> On Fri, Dec 11, 2020 at 06:31:21PM +0100, Felicitas Hetzelt wrote:
> > Hello,
>
> Hi! Please see below my responses.
>
> > we have been analyzing the Hypervisor-OS interface of Linux
> > and discovered bugs in the
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 the workload being run, the default 64MB
of it might not be enough and it may run out of buffers
On Wed, Dec 09, 2020 at 06:51:05PM +0100, Borislav Petkov wrote:
> On Wed, Dec 09, 2020 at 01:19:46PM +0000, Ashish Kalra wrote:
> > reserve_crashkernel() calls swiotlb_size_or_default() to get SWIOTLB
> ...
>
> Thanks for explaining.
>
> > There is a need to introdu
On Wed, Dec 09, 2020 at 01:54:42PM +0100, Borislav Petkov wrote:
> On Wed, Dec 09, 2020 at 12:29:07PM +0000, Ashish Kalra wrote:
> > As i mentioned in the main comments above, this cannot be called in
> > mem_encrypt_init() as that breaks reserve_crashkernel() which depends
> &
nd.
>
> On Mon, Dec 07, 2020 at 11:10:57PM +0000, 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
> > dri
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
Hello Boris,
On Mon, Dec 07, 2020 at 01:10:07PM +0100, Borislav Petkov wrote:
> On Thu, Dec 03, 2020 at 03:25:59AM +0000, Ashish Kalra wrote:
> > diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
> > index 1bcfbcd2bfd7..46549bd3d840 100644
> > --- a/arch
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
Hello Konrad,
On Mon, Nov 23, 2020 at 10:56:31PM +, Ashish Kalra wrote:
> Hello Konrad,
>
> On Mon, Nov 23, 2020 at 12:56:32PM -0500, Konrad Rzeszutek Wilk wrote:
> > On Mon, Nov 23, 2020 at 06:06:47PM +0100, Borislav Petkov wrote:
> > > On Thu, Nov 19, 2020 at
Hello Konrad,
On Mon, Nov 23, 2020 at 12:56:32PM -0500, Konrad Rzeszutek Wilk wrote:
> On Mon, Nov 23, 2020 at 06:06:47PM +0100, Borislav Petkov wrote:
> > On Thu, Nov 19, 2020 at 09:42:05PM +0000, Ashish Kalra wrote:
> > > From: Ashish Kalra
> > >
> > > Fo
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
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
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
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
On Fri, Nov 13, 2020 at 04:19:25PM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 05, 2020 at 09:20:45PM +0000, 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:
&
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 +0000, 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 +,
On Thu, Nov 05, 2020 at 03:20:07PM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 05, 2020 at 07:38:28PM +0000, Ashish Kalra wrote:
> > On Thu, Nov 05, 2020 at 02:06:49PM -0500, Konrad Rzeszutek Wilk wrote:
> > > .
> > > > > Right, so I am w
gt; > > > and reserve_crashkernel() which use the allocated
> > > > > > SWIOTLB buffer size, hence calling it explicitly
> > > > > > from setup_arch().
> > > > > >
> > > > > > The SWIOTLB default size adjustment is added as an
> > &g
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 +0000, Ashish Kalra wrote:
> > Hello Konrad,
> >
> > On Wed, Nov 04, 2020 at 05:14:52PM -0500, Konrad Rzeszutek Wilk wrote:
> > > On Wed, No
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 +0000, Ashish Kalra wrote:
> > From: Ashish Kalra
> >
> > For SEV, all DMA to and from guest has to use shared
> > (un-encrypted) page
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
On Wed, Jun 24, 2020 at 12:23:57AM +, Ashish Kalra wrote:
> Hello Konrad,
>
> On Tue, Jun 23, 2020 at 09:38:43AM -0400, Konrad Rzeszutek Wilk wrote:
> > On Mon, Apr 27, 2020 at 06:53:18PM +0000, Ashish Kalra wrote:
> > > Hello Konrad,
> > >
> > >
Hello Konrad,
On Tue, Jun 23, 2020 at 09:38:43AM -0400, Konrad Rzeszutek Wilk wrote:
> On Mon, Apr 27, 2020 at 06:53:18PM +0000, Ashish Kalra wrote:
> > Hello Konrad,
> >
> > On Mon, Mar 30, 2020 at 10:25:51PM +, Ashish Kalra wrote:
> > > Hello Konrad,
> >
Hello Konrad,
On Mon, Mar 30, 2020 at 10:25:51PM +, Ashish Kalra wrote:
> Hello Konrad,
>
> On Tue, Mar 03, 2020 at 12:03:53PM -0500, Konrad Rzeszutek Wilk wrote:
> > On Tue, Feb 04, 2020 at 07:35:00PM +0000, Ashish Kalra wrote:
> > > Hello Konrad,
> > >
&g
Hello Konrad,
On Tue, Mar 03, 2020 at 12:03:53PM -0500, Konrad Rzeszutek Wilk wrote:
> On Tue, Feb 04, 2020 at 07:35:00PM +0000, Ashish Kalra wrote:
> > Hello Konrad,
> >
> > Looking fwd. to your feedback regarding support of other memory
> > encryption architectur
On Tue, Mar 03, 2020 at 12:03:53PM -0500, Konrad Rzeszutek Wilk wrote:
> > >
> > > >>
> > > >>Actually you seem to be piggybacking on pci_swiotlb_detect_4gb - so
> > > >>perhaps add in this code ? Albeit it really should be in it's own
> > > >>file, not in
Hello Konrad,
Looking fwd. to your feedback regarding support of other memory
encryption architectures such as Power, S390, etc.
Thanks,
Ashish
On Fri, Jan 24, 2020 at 11:00:08PM +, Ashish Kalra wrote:
> On Tue, Jan 21, 2020 at 03:54:03PM -0500, Konrad Rzeszutek Wilk wr
On Tue, Jan 21, 2020 at 03:54:03PM -0500, Konrad Rzeszutek Wilk wrote:
> >
> > Additional memory calculations based on # of PCI devices and
> > their memory ranges will make it more complicated with so
> > many other permutations and combinations to explore, it is
> > essential to keep this patch
On Thu, Dec 19, 2019 at 08:52:45PM -0500, Konrad Rzeszutek Wilk wrote:
> On Mon, Dec 09, 2019 at 11:13:46PM +0000, 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 m
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
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
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