* How to fix Linux CMA on x86 with internal graphic card i915/hda_intel ioremap error?
@ 2024-03-28 6:29 Suesens, Sebastian
2024-04-17 9:08 ` Jani Nikula
0 siblings, 1 reply; 2+ messages in thread
From: Suesens, Sebastian @ 2024-03-28 6:29 UTC (permalink / raw)
To: intel-gfx@lists.freedesktop.org
Hello,
I enabled the CMA (CONFIG_CMA=y) for an x86 machine on Linux kernel v5.10 and v5.15 When I boot the system the CMA reserved memory, but when the graphic card driver i915 or hda_intel is loaded the system crashed.
I see that ioremap on RAM at 0x0000000000000000 - 0x00000000d0000000 get fail. When I blacklist the i915 and hda_intel module the system boots fine with cma memory reserved.
I think this has something to do with the shared memory which this driver use.
Does anyone know if a kernel config or something else prevents this crash?
Please answer me in CC.
Regards Sebastian
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to fix Linux CMA on x86 with internal graphic card i915/hda_intel ioremap error?
2024-03-28 6:29 How to fix Linux CMA on x86 with internal graphic card i915/hda_intel ioremap error? Suesens, Sebastian
@ 2024-04-17 9:08 ` Jani Nikula
0 siblings, 0 replies; 2+ messages in thread
From: Jani Nikula @ 2024-04-17 9:08 UTC (permalink / raw)
To: Suesens, Sebastian, intel-gfx@lists.freedesktop.org
On Thu, 28 Mar 2024, "Suesens, Sebastian" <sebastian.suesens@zeiss.com> wrote:
> Hello,
>
> I enabled the CMA (CONFIG_CMA=y) for an x86 machine on Linux kernel v5.10 and v5.15 When I boot the system the CMA reserved memory, but when the graphic card driver i915 or hda_intel is loaded the system crashed.
> I see that ioremap on RAM at 0x0000000000000000 - 0x00000000d0000000 get fail. When I blacklist the i915 and hda_intel module the system boots fine with cma memory reserved.
>
> I think this has something to do with the shared memory which this driver use.
>
> Does anyone know if a kernel config or something else prevents this crash?
If you can reproduce this with recent kernels, please file a bug as
described at [1].
BR,
Jani.
[1] https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html
--
Jani Nikula, Intel
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2024-03-28 6:29 How to fix Linux CMA on x86 with internal graphic card i915/hda_intel ioremap error? Suesens, Sebastian
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