Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-07-01 Thread Will Deacon
On Wed, Jul 01, 2020 at 12:40:50AM -0700, Bjorn Andersson wrote: > On Wed 03 Jun 04:00 PDT 2020, Robin Murphy wrote: > > at that point I'm inclined to suggest we give up and stop trying to > > drive these things with arm-smmu. The XZR thing was bad enough, but if > > they're not even going to

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-07-01 Thread Bjorn Andersson
On Wed 03 Jun 04:00 PDT 2020, Robin Murphy wrote: > On 2020-06-02 07:32, Bjorn Andersson wrote: > > On Wed 27 May 04:03 PDT 2020, Will Deacon wrote: > > > > > Hi John, Bjorn, > > > > > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > > > On Thu, May 14, 2020 at 12:34 PM

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-03 Thread Bjorn Andersson
On Wed 03 Jun 03:24 PDT 2020, Thierry Reding wrote: > On Tue, Jun 02, 2020 at 12:32:49PM -0700, Bjorn Andersson wrote: > > On Tue 02 Jun 04:02 PDT 2020, Thierry Reding wrote: > > > > > On Wed, May 27, 2020 at 12:03:44PM +0100, Will Deacon wrote: > > > > Hi John, Bjorn, > > > > > > > > On Tue,

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-03 Thread Bjorn Andersson
On Wed 03 Jun 04:11 PDT 2020, Will Deacon wrote: > On Mon, Jun 01, 2020 at 11:32:10PM -0700, Bjorn Andersson wrote: > > On Wed 27 May 04:03 PDT 2020, Will Deacon wrote: > > > > > Hi John, Bjorn, > > > > > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > > > On Thu, May 14,

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-03 Thread Will Deacon
On Mon, Jun 01, 2020 at 11:32:10PM -0700, Bjorn Andersson wrote: > On Wed 27 May 04:03 PDT 2020, Will Deacon wrote: > > > Hi John, Bjorn, > > > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > > On Thu, May 14, 2020 at 12:34 PM wrote: > > > > > > > > On Thu 27 Feb 18:57 PST

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-03 Thread Robin Murphy
On 2020-06-02 07:32, Bjorn Andersson wrote: On Wed 27 May 04:03 PDT 2020, Will Deacon wrote: Hi John, Bjorn, On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: On Thu, May 14, 2020 at 12:34 PM wrote: On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: Rob, Will, we're reaching

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-03 Thread Thierry Reding
On Tue, Jun 02, 2020 at 12:32:49PM -0700, Bjorn Andersson wrote: > On Tue 02 Jun 04:02 PDT 2020, Thierry Reding wrote: > > > On Wed, May 27, 2020 at 12:03:44PM +0100, Will Deacon wrote: > > > Hi John, Bjorn, > > > > > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > > > On Thu,

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-02 Thread Bjorn Andersson
On Tue 02 Jun 04:02 PDT 2020, Thierry Reding wrote: > On Wed, May 27, 2020 at 12:03:44PM +0100, Will Deacon wrote: > > Hi John, Bjorn, > > > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > > On Thu, May 14, 2020 at 12:34 PM wrote: > > > > > > > > On Thu 27 Feb 18:57 PST 2020,

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-02 Thread Thierry Reding
On Wed, May 27, 2020 at 12:03:44PM +0100, Will Deacon wrote: > Hi John, Bjorn, > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > On Thu, May 14, 2020 at 12:34 PM wrote: > > > > > > On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: > > > > > > Rob, Will, we're reaching the

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-06-02 Thread Bjorn Andersson
On Wed 27 May 04:03 PDT 2020, Will Deacon wrote: > Hi John, Bjorn, > > On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > > On Thu, May 14, 2020 at 12:34 PM wrote: > > > > > > On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: > > > > > > Rob, Will, we're reaching the point where

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-05-27 Thread Will Deacon
Hi John, Bjorn, On Tue, May 26, 2020 at 01:34:45PM -0700, John Stultz wrote: > On Thu, May 14, 2020 at 12:34 PM wrote: > > > > On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: > > > > Rob, Will, we're reaching the point where upstream has enough > > functionality that this is becoming a

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-05-27 Thread Laurentiu Tudor
On 5/26/2020 11:34 PM, John Stultz wrote: > On Thu, May 14, 2020 at 12:34 PM wrote: >> >> On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: >> >> Rob, Will, we're reaching the point where upstream has enough >> functionality that this is becoming a critical issue for us. >> >> E.g. Lenovo

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-05-26 Thread John Stultz
On Thu, May 14, 2020 at 12:34 PM wrote: > > On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: > > Rob, Will, we're reaching the point where upstream has enough > functionality that this is becoming a critical issue for us. > > E.g. Lenovo Yoga C630 is lacking this and a single dts patch to

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-05-14 Thread bjorn . andersson
On Thu 27 Feb 18:57 PST 2020, Bjorn Andersson wrote: Rob, Will, we're reaching the point where upstream has enough functionality that this is becoming a critical issue for us. E.g. Lenovo Yoga C630 is lacking this and a single dts patch to boot mainline with display, GPU, WiFi and audio working

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-03-04 Thread Laurentiu Tudor
Hello, On 28.02.2020 04:57, Bjorn Andersson wrote: On Mon 09 Dec 07:07 PST 2019, Thierry Reding wrote: From: Thierry Reding Sorry for the slow response on this, finally got the time to go through this in detail and try it out on some Qualcomm boards. On some platforms, the firmware will

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-02-27 Thread Bjorn Andersson
On Mon 09 Dec 07:07 PST 2019, Thierry Reding wrote: > From: Thierry Reding > Sorry for the slow response on this, finally got the time to go through this in detail and try it out on some Qualcomm boards. > On some platforms, the firmware will setup hardware to read from a given > region of

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-01-13 Thread Bjorn Andersson
On Mon 13 Jan 14:01 PST 2020, Saravana Kannan wrote: > I added everyone from the other thread, but somehow managed to miss > the Bjorn who sent the emails! Fixing that now. > Thanks for looping me in Saravana. > On Mon, Jan 13, 2020 at 6:07 AM Thierry Reding > wrote: > > > > On Fri, Jan 10,

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-01-13 Thread Saravana Kannan via iommu
I added everyone from the other thread, but somehow managed to miss the Bjorn who sent the emails! Fixing that now. On Mon, Jan 13, 2020 at 6:07 AM Thierry Reding wrote: > > On Fri, Jan 10, 2020 at 08:56:39PM -0800, Saravana Kannan wrote: > > Hi Thierry, > > > > I happened upon this thread while

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-01-13 Thread Thierry Reding
On Fri, Jan 10, 2020 at 08:56:39PM -0800, Saravana Kannan wrote: > Hi Thierry, > > I happened upon this thread while looking into another thread [1]. > > > From: Thierry Reding > > > > On some platforms, the firmware will setup hardware to read from a given > > region of memory. One such

Re: [RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2020-01-10 Thread Saravana Kannan via iommu
Hi Thierry, I happened upon this thread while looking into another thread [1]. > From: Thierry Reding > > On some platforms, the firmware will setup hardware to read from a given > region of memory. One such example is a display controller that is > scanning out a splash screen from physical

[RFC 0/2] iommu: arm-smmu: Add support for early direct mappings

2019-12-09 Thread Thierry Reding
From: Thierry Reding On some platforms, the firmware will setup hardware to read from a given region of memory. One such example is a display controller that is scanning out a splash screen from physical memory. During Linux' boot process, the ARM SMMU will configure all contexts to fault by