On Mon 11 Oct 22:26 CDT 2021, John Stultz wrote:
> In commit 424953cf3c665 ("qcom_scm: hide Kconfig symbol"), some
> logic was added to make the code depend on CONFIG_ARM_SMMU_QCOM,
> however no such option exist.
>
> This caused regressions on db845c (and I suspect other qcom
> platforms), but can be easily fixed up by adding a new option
> to re-enable the newly conditionalized code.
>
> I set it to default to ARCH_QCOM, so folks don't have to
> discover this new option to keep things booting, but if folks
> would rather, I'm ok to drop that line.
>
I've not looked where the discussion went, but Dmitry posted this end of
last week:
https://lore.kernel.org/linux-arm-msm/20211010023350.978638-1-dmitry.baryshkov@xxxxxxxxxx/
Regards,
Bjorn
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> Cc: Amit Pundir <amit.pundir@xxxxxxxxxx>
> Cc: Caleb Connolly <caleb.connolly@xxxxxxxxxx>
> Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
> Cc: linux-arm-kernel <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-arm-msm <linux-arm-msm@xxxxxxxxxxxxxxx>
> Fixes: 424953cf3c665 ("qcom_scm: hide Kconfig symbol")
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---
> drivers/iommu/Kconfig | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index c5c71b7ab7e83..e674796b1174d 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -380,6 +380,16 @@ config ARM_SMMU_V3_SVA
> Say Y here if your system supports SVA extensions such as PCIe PASID
> and PRI.
>
> +config ARM_SMMU_QCOM
> + bool "QCOM Specific ARM SMMU implementation support"
> + depends on ARM_SMMU
> + default ARCH_QCOM
> + help
> + Support for the QCOM implementation of the ARM System MMU architecture.
> +
> + Say Y here if your SoC includes an QCOM IOMMU device implementing
> + the ARM SMMU architecture.
> +
> config S390_IOMMU
> def_bool y if S390 && PCI
> depends on S390 && PCI
> --
> 2.25.1
>
