On Wed, Feb 08, 2017 at 07:46:55PM +0100, Geert Uytterhoeven wrote: > Hi Russell, > > On Wed, Feb 8, 2017 at 7:39 PM, Russell King - ARM Linux > <linux@xxxxxxxxxxxxxxx> wrote: > > On Wed, Feb 08, 2017 at 06:53:14PM +0100, Geert Uytterhoeven wrote: > >> The problem is that "multiplatform" may mean one of two things: > >> 1. Build a single kernel that can run on multiple platforms. > >> This is tricky when enabling XIP and/or NOMMU, as the physical parameters > >> must be compatible with all platforms. But building a kernel with the > >> right parameters is the responsibility of the user. > >> I.e. don't shoot yourself in the foot. > >> 2. Your platform uses the arch/arm multiplatform framework. > >> > >> As everything is being migrated to 2, not allowing XIP and/or NOMMU on > >> "multiplatform" is IMHO an insane limitation. > > > > There _isn't_ a framework. What there is are a collection of Kconfig > > options that multiplatform provides you that can also be selected by > > any other configuration route. > > > > (2) really doesn't apply. > > > > The real issue is that board stuff ends up with a "depends on MULTI_xxx" > > which needs to be bypassed. That's pretty easy to do - I've done it as > > a proof of concept a few years ago when this exact same thing came up > > for !MMU, and since then I've been NAKing and refusing to apply patches > > that try to re-use multiplat for !MMU. > > So you mean this: > > --- a/arch/arm/mach-shmobile/Kconfig > +++ b/arch/arm/mach-shmobile/Kconfig > @@ -31,7 +31,7 @@ config ARCH_RMOBILE > > menuconfig ARCH_RENESAS > bool "Renesas ARM SoCs" > - depends on ARCH_MULTI_V7 && MMU > + depends on MMU > select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE > select ARCH_SHMOBILE > select ARCH_SHMOBILE_MULTI I don't see the connection, sorry. That looks totally broken to me, because you now end up being able to select it when you have (eg) something like ARCH_RPC enabled, and that's totally insane. If you think the above patch in some way represents what I was saying, that's wrong as well. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.
