On Tue, Oct 12, 2021 at 05:18:00PM +0200, Arnd Bergmann wrote: > From: Arnd Bergmann <[email protected]> > > My previous bugfix ended up making things worse for the QCOM IOMMU > driver when it forgot to add the Kconfig symbol that is getting used to > control the compilation of the SMMU implementation specific code > for Qualcomm. > > Fixes: 424953cf3c66 ("qcom_scm: hide Kconfig symbol") > Reported-by: Daniel Lezcano <[email protected]> > Reported-by: Dmitry Baryshkov <[email protected]> > Reported-by: John Stultz <[email protected]> > Link: > https://lore.kernel.org/lkml/[email protected]/ > Signed-off-by: Arnd Bergmann <[email protected]> > --- > In case we want fix it this way after all, here is the patch > I made. Either this one or Dmitry patch from the link above > is required for v5.15 > --- > drivers/iommu/Kconfig | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig > index c5c71b7ab7e8..3eb68fa1b8cc 100644 > --- a/drivers/iommu/Kconfig > +++ b/drivers/iommu/Kconfig > @@ -355,6 +355,14 @@ config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT > 'arm-smmu.disable_bypass' will continue to override this > config. > > +config ARM_SMMU_QCOM > + def_tristate y > + depends on ARM_SMMU && ARCH_QCOM > + select QCOM_SCM > + help > + When running on a Qualcomm platform that has the custom variant > + of the ARM SMMU, this needs to be built into the SMMU driver. > +
FWIW, I prefer this solution over changing the driver code, so: Acked-by: Will Deacon <[email protected]> I assume you'll be getting this fixed for 5.15? Cheers, Will _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
