I made test on already installed image. Connected with usb network
dongle, cloned kernel-source git, made sequence-patch to 4.1 source,
copied modified lpae kernel config then booted
resulting kernel.
This extra modules i tried to add to /etc/modules-load.d/ and system
start fine this way without manual modprobing, but this is not same as
dracut config as i understand.
I never tried to branch kernel-source repo on obs to create custom
config, i can make this test also if you can give me please some
directions on how to properly create modified kernel branch.
---
Best Regards,
Misha Komarovskiy
zombahatgmaildotcom
On Mon, Aug 17, 2015 at 2:53 PM, Guillaume Gardet
Le 17/08/2015 13:30, Misha Komarovskiy a écrit :
Just tested lpae config without CONFIG_EXYNOS_IOMMU on snow, system boots with black screen same, then modprobe cros_ec_devs, ptn3460, pwm-samsung makes panel start to work without kernel panic.
Thanks for your tests. Could you add thoses modules to /etc/dracut.conf.d/exynos_modules.conf with the new line: add_drivers += "cros_ec_devs ptn3460 pwm-samsung"
and recreate initrd with dracut and check if it boots fine?
If it does not work, try 'force_drivers+=' instead of 'add_drivers +=' and recreate initrd.
Guillaume
--- Best Regards, Misha Komarovskiy zombahatgmaildotcom
On Mon, Aug 17, 2015 at 12:01 PM, Misha Komarovskiy
wrote: Hello Guillaume, I tested both exynos_defconfig and multi_v7_defconfig, they work fine. But ill test lpae config without EXYNOS_IOMMU today and will report. --- Best Regards, Misha Komarovskiy zombahatgmaildotcom
On Mon, Aug 17, 2015 at 9:59 AM, Guillaume Gardet
wrote: Hi,
Le 16/08/2015 21:59, Misha Komarovskiy a écrit :
Hello, Maybe we can disable only Exynos IOMMU in configs for now? Same way it is disabled in current exynos_defconfig here
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/arch/... As i understand it is broken for all exynos devices not only snow.
That is exactly what I would like to do since I read this thread: https://lkml.org/lkml/2015/2/17/163
Before submitting the idea here, I wanted to check if disabling Exynos IOMMU in config was enough. I had only time to test the exynos_defconfig with openSUSE kernel and it was OK (boot messages and login prompt displayed).
Guillaume
--- Best Regards, Misha Komarovskiy zombahatgmaildotcom
On Thu, Jul 23, 2015 at 4:29 PM, Alexander Graf
wrote: > Am 23.07.2015 um 15:15 schrieb Andreas Färber
: > >> Am 23.07.2015 um 15:12 schrieb Alexander Graf: >>> >>> On 07/23/15 14:43, Andreas Färber wrote: >>>> >>>> Am 23.07.2015 um 14:22 schrieb Guillaume Gardet: >>>> Maybe some config options compiled as module (which?) and >>>> blacklisted >>>> for chromebooks could be ok? >>> >>> Maybe. Someone with a Chromebook needs to sit down and try. :) >> >> Hrm, rather than disable it one way or another manually, couldn't we >> just blacklist it inside the kernel? I doubt that we can load iommu >> as >> module... > > You mean as in patch the iommu probe code to check for "google,snow", > "google,spring", etc.? For example - or remove the respective dt node. Or as a property to the IOMMU dt node...
Alex
> Andreas > > -- > SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany > GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton; > HRB > 21284 (AG Nürnberg)
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