26.04.2021 10:14, Thierry Reding пишет: > On Sat, Apr 24, 2021 at 11:27:10PM +0300, Dmitry Osipenko wrote: >> 23.04.2021 18:23, Dmitry Osipenko пишет: >>> 23.04.2021 18:01, Guillaume Tucker пишет: >>>> On 02/04/2021 15:40, Dmitry Osipenko wrote: >>>>> 01.04.2021 11:55, Nicolin Chen пишет: >>>>>> On Mon, Mar 29, 2021 at 02:32:56AM +0300, Dmitry Osipenko wrote: >>>>>>> The previous commit fixes problem where display client was attaching too >>>>>>> early to IOMMU during kernel boot in a multi-platform kernel configuration >>>>>>> which enables CONFIG_ARM_DMA_USE_IOMMU=y. The workaround that helped to >>>>>>> defer the IOMMU attachment for Nyan Big Chromebook isn't needed anymore, >>>>>>> revert it. >>>>>> >>>>>> Sorry for the late reply. I have been busy with downstream tasks. >>>>>> >>>>>> I will give them a try by the end of the week. Yet, probably it'd >>>>>> be better to include Guillaume also as he has the Nyan platform. >>>>>> >>>>> >>>>> Indeed, thanks. Although, I'm pretty sure that it's the same issue which >>>>> I reproduced on Nexus 7. >>>>> >>>>> Guillaume, could you please give a test to these patches on Nyan Big? >>>>> There should be no EMEM errors in the kernel log with this patches. >>>>> >>>>> https://patchwork.ozlabs.org/project/linux-tegra/list/?series=236215 >>>> >>>> So sorry for the very late reply. I have tried the patches but >>>> hit some issues on linux-next, it's not reaching a login prompt >>>> with next-20210422. So I then tried with next-20210419 which >>>> does boot but shows the IOMMU error: >>>> >>>> <6>[ 2.995341] tegra-dc 54200000.dc: Adding to iommu group 1 >>>> <4>[ 3.001070] Failed to attached device 54200000.dc to IOMMU_mapping >>>> >>>> https://lava.collabora.co.uk/scheduler/job/3570052#L1120 >>>> >>>> The branch I'm using with the patches applied can be found here: >>>> >>>> https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210419-nyan-big-drm-read/ >>>> >>>> Hope this helps, let me know if you need anything else to be >>>> tested. >>> >>> >>> Hello Guillaume, >>> >>> The current linux-next doesn't boot on all ARM (AFAIK), the older >>> next-20210413 works. The above message should be unrelated to the boot >>> problem. It should be okay to ignore that message as it should be >>> harmless in yours case. >>> >> >> Although, the 20210419 should be good. >> >> Thierry, do you know what those SOR and Nouveau issues are about? > > There's a use-after-free (though it's really a use-before-init) issue in > linux-next at the moment, but a fix has been suggested. The fix for this > along with an additional leak plug is here: > > http://patchwork.ozlabs.org/project/linux-tegra/list/?series=240569 Nice, thank you. Maybe Guillaume could give it a test. > I'm not aware of any Nouveau issues. What version and platform are those > happening on? Are there any logs? I can't seem to find them in this > thread. This all is on Nyan Big using linux-next-20210419. There is a link to the full log above. I see this Nouveau failure: <6>[ 19.323113] nouveau 57000000.gpu: Adding to iommu group 2 <6>[ 19.323615] nouveau 57000000.gpu: NVIDIA GK20A (0ea000a1) <6>[ 19.323668] nouveau 57000000.gpu: imem: using IOMMU <3>[ 19.323795] nouveau 57000000.gpu: gr ctor failed: -2 <4>[ 19.323983] nouveau: probe of 57000000.gpu failed with error -2
