On Mon, Nov 24, 2025 at 12:33:47PM +0100, Konrad Dybcio wrote: > On 11/24/25 7:45 AM, Mukesh Ojha wrote: > > On Fri, Nov 21, 2025 at 04:08:36PM +0100, Konrad Dybcio wrote: > >> On 11/21/25 12:37 PM, Mukesh Ojha wrote: > >>> On Fri, Nov 21, 2025 at 11:27:57AM +0000, Bryan O'Donoghue wrote: > >>>> On 21/11/2025 11:01, Mukesh Ojha wrote: > >>>>> In May 2025, we discussed the challenges at Linaro Connect 2025 [1] > >>>>> related to Secure PAS remoteproc enablement when Linux is running at EL2 > >>>>> for Qualcomm SoCs. > >>>>> > >>>>> [1] https://resources.linaro.org/en/resource/sF8jXifdb9V1mUefdbfafa > >>>>>
[...] > >>>>> > >>>>> Changes in v8: > >>>>> https://lore.kernel.org/lkml/[email protected]/ > >>>>> - Addressed suggestion from Stephen which was regarding commit > >>>>> message(9/14), > >>>>> debug log(12/14) suggestion, and return type change(4/14). > >>>>> - Added R-b tag on 10/14 . > >>>> Sorry. > >>>> > >>>> Did we actually come up with a cogent reason to omit the video firmware > >>>> loading here ? > >>>> > >>>> AFAIU it is required for Lemans and Glymur - leaving it out is blocking > >>>> getting video stuff done and storing up trouble. > >>>> > >>>> What exactly is the blockage - is it something you want help with ? > >>> > >>> I replied to you here[1] and given my reason..till something concluded on > >>> "multi-cell IOMMU[2]", I can not add video and block what is working > >>> already. > >>> > >>> [1] > >>> https://lore.kernel.org/lkml/[email protected]/ > >>> > >>> [2] > >>> https://lore.kernel.org/lkml/[email protected]/ > >> > >> I see that the following files call qcom_scm_pas_auth_.*(): > >> > >> drivers/firmware/qcom/qcom_scm.c > >> drivers/gpu/drm/msm/adreno/adreno_gpu.c > >> drivers/media/platform/qcom/iris/iris_firmware.c > >> drivers/media/platform/qcom/venus/firmware.c > >> drivers/net/ipa/ipa_main.c > >> drivers/net/wireless/ath/ath12k/ahb.c > >> drivers/remoteproc/qcom_q6v5_pas.c > >> drivers/remoteproc/qcom_wcnss.c > >> > >> iris is difficult, rproc is done, adreno doesn't need it.. > >> > >> would ath12k_ahb or IPA be affected by this series as well? > > > > Yes, they would be affected, and the modem as well, when Linux is > > running at EL2. However, I do not see them present in any of the QLi and > > targeted compute SoCs at the moment. Therefore, our firmware does not > > support it yet. > > Hamoa's little brother should have ath12k_ahb.. and I assume IPA is > present on at least some platforms where there's a modem (QCM6490?) Sure, We will add the support for IP's when there is a need for SoC running Linux at EL2 (backed by firmware). > > Konrad -- -Mukesh Ojha
