[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 07/10] arm: make it possible to disable the SMMU driver
On Wed, 23 May 2018, Andrii Anisov wrote: > Hello Stefano, > > > On 23.05.18 03:25, Stefano Stabellini wrote: > > Introduce a Kconfig option for the ARM SMMUv1 and SMMUv2 driver. > > > > Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> > > CC: jbeulich@xxxxxxxx > > > > --- > > Changes in v3: > > - rename SMMUv2 to ARM_SMMU > > - improve help message > > - use if ARM > > > > Changes in v2: > > - rename HAS_SMMUv2 to SMMUv2 > > - move SMMUv2 to xen/drivers/passthrough/Kconfig > > --- > > xen/drivers/passthrough/Kconfig | 12 ++++++++++++ > > xen/drivers/passthrough/arm/Makefile | 2 +- > > 2 files changed, 13 insertions(+), 1 deletion(-) > > > > diff --git a/xen/drivers/passthrough/Kconfig > > b/xen/drivers/passthrough/Kconfig > > index 8d90b67..a3c0649 100644 > > --- a/xen/drivers/passthrough/Kconfig > > +++ b/xen/drivers/passthrough/Kconfig > > @@ -1,3 +1,15 @@ > > config HAS_PASSTHROUGH > > bool > > + > > +if ARM > > +config ARM_SMMU > > + bool "ARM SMMUv1 and v2 driver" > > + default y > Did you mean here "default n"? So in a platform selecting configs patch you > silently skipping it for QEMU and RCAR3, but enabling for MPSOC? I meant "default y" because I am only trying to introduce the options in this patch series, I am not trying to change the defaults (yet). In any case, even with "default y" it works as intended if you start from tiny.config. 1) cp arch/arm/configs/tiny.conf .config 2) make olddefconfig 3) make menuconfig -> select RCAR3 the results is that ARM_SMMU will be disabled because it is already disabled in tiny.config and CONFIG_RCAR3 won't enable it. > > + ---help--- > > + Support for implementations of the ARM System MMU architecture > > + versions 1 and 2. > > + > > + Say Y here if your SoC includes an IOMMU device implementing the > > + ARM SMMU architecture. > > +endif > > diff --git a/xen/drivers/passthrough/arm/Makefile > > b/xen/drivers/passthrough/arm/Makefile > > index f4cd26e..0156431 100644 > > --- a/xen/drivers/passthrough/arm/Makefile > > +++ b/xen/drivers/passthrough/arm/Makefile > > @@ -1,2 +1,2 @@ > > obj-y += iommu.o > > -obj-y += smmu.o > > +obj-$(ARM_SMMU) += smmu.o _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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