Between me trying to get rid of iommu_present() and Mario wanting to
support the AMD equivalent of DMAR_PLATFORM_OPT_IN, scrutiny has shown
that the iommu_dma_protection attribute is being far too optimistic.
Even if an IOMMU might be present for some PCI segment in the system,
that doesn't necessa
On Thu, Mar 17, 2022 at 04:17:07PM +, Robin Murphy wrote:
> Between me trying to get rid of iommu_present() and Mario wanting to
> support the AMD equivalent of DMAR_PLATFORM_OPT_IN, scrutiny has shown
> that the iommu_dma_protection attribute is being far too optimistic.
> Even if an IOMMU mig
gt; iommu@lists.linux-foundation.org; linux-...@vger.kernel.org; Limonciello,
> Mario
> Subject: [PATCH] thunderbolt: Make iommu_dma_protection more accurate
>
> Between me trying to get rid of iommu_present() and Mario wanting to
> support the AMD equivalent of DMAR_PLATFORM_OPT
kernel.org; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux-...@vger.kernel.org
> Subject: RE: [PATCH] thunderbolt: Make iommu_dma_protection more
> accurate
>
> [Public]
>
>
>
> > -Original Message-
> > From: Robin Murphy
> > Sent:
Hi Robin,
Thanks for working on this!
On Thu, Mar 17, 2022 at 04:17:07PM +, Robin Murphy wrote:
> Between me trying to get rid of iommu_present() and Mario wanting to
> support the AMD equivalent of DMAR_PLATFORM_OPT_IN, scrutiny has shown
> that the iommu_dma_protection attribute is being fa
Hi Mario,
On Thu, Mar 17, 2022 at 08:36:13PM +, Limonciello, Mario wrote:
> Here is a proposal on top of what you did for this.
> The idea being check the ports right when the links are made if they exist
> (all the new USB4 stuff) and then check all siblings on TBT3 stuff.
>
> diff --git
On 2022-03-18 06:44, Mika Westerberg wrote:
Hi Robin,
Thanks for working on this!
On Thu, Mar 17, 2022 at 04:17:07PM +, Robin Murphy wrote:
Between me trying to get rid of iommu_present() and Mario wanting to
support the AMD equivalent of DMAR_PLATFORM_OPT_IN, scrutiny has shown
that the i
On 2022-03-18 11:38, mika.westerb...@linux.intel.com wrote:
Hi Mario,
On Thu, Mar 17, 2022 at 08:36:13PM +, Limonciello, Mario wrote:
Here is a proposal on top of what you did for this.
The idea being check the ports right when the links are made if they exist
(all the new USB4 stuff) and t
Hi Robin,
On Fri, Mar 18, 2022 at 12:01:42PM +, Robin Murphy wrote:
> > This adds quite a lot code and complexity, and honestly I would like to
> > keep it as simple as possible (and this is not enough because we need to
> > make sure the DMAR bit is there so that none of the possible connecte
On 2022-03-18 13:25, mika.westerb...@linux.intel.com wrote:
Hi Robin,
On Fri, Mar 18, 2022 at 12:01:42PM +, Robin Murphy wrote:
This adds quite a lot code and complexity, and honestly I would like to
keep it as simple as possible (and this is not enough because we need to
make sure the DMAR
nel.org; linux-
> ker...@vger.kernel.org; iommu@lists.linux-foundation.org; linux-
> p...@vger.kernel.org
> Subject: Re: [PATCH] thunderbolt: Make iommu_dma_protection more
> accurate
>
> On 2022-03-18 13:25, mika.westerb...@linux.intel.com wrote:
> > Hi Robin,
> >
> > On
On Fri, Mar 18, 2022 at 02:08:16PM +, Robin Murphy wrote:
> On 2022-03-18 13:25, mika.westerb...@linux.intel.com wrote:
> > Hi Robin,
> >
> > On Fri, Mar 18, 2022 at 12:01:42PM +, Robin Murphy wrote:
> > > > This adds quite a lot code and complexity, and honestly I would like to
> > > > ke
On Fri, Mar 18, 2022 at 02:08:16PM +, Robin Murphy wrote:
> OK, so do we have any realistic options for identifying the correct PCI
> devices, if USB4 PCIe adapters might be anywhere relative to their
> associated NHI? Short of maintaining a list of known IDs, the only thought I
> have left is
On Fri, Mar 18, 2022 at 03:51:21PM +0100, Lukas Wunner wrote:
> On Fri, Mar 18, 2022 at 02:08:16PM +, Robin Murphy wrote:
> > OK, so do we have any realistic options for identifying the correct PCI
> > devices, if USB4 PCIe adapters might be anywhere relative to their
> > associated NHI? Short
Hi Lukas,
On Fri, Mar 18, 2022 at 03:51:21PM +0100, Lukas Wunner wrote:
> On Fri, Mar 18, 2022 at 02:08:16PM +, Robin Murphy wrote:
> > OK, so do we have any realistic options for identifying the correct PCI
> > devices, if USB4 PCIe adapters might be anywhere relative to their
> > associated
On 2022-03-18 14:47, mika.westerb...@linux.intel.com wrote:
On Fri, Mar 18, 2022 at 02:08:16PM +, Robin Murphy wrote:
On 2022-03-18 13:25, mika.westerb...@linux.intel.com wrote:
Hi Robin,
On Fri, Mar 18, 2022 at 12:01:42PM +, Robin Murphy wrote:
This adds quite a lot code and complexi
Hi Robin,
On Fri, Mar 18, 2022 at 03:15:19PM +, Robin Murphy wrote:
> > IMHO we should just trust the firmare provided information here
> > (otherwise we are screwed anyway as there is no way to tell if the
> > devices connected prior the OS can still do DMA), and use the external
> > facing p
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