> Subject: Re: [PATCH] powerpc/85xx: allow CONFIG_PHYS_64BIT to be > selectable > > Li Yang-R58472 wrote: > > > The mpc85xx_defconfig does include silicons with e500v1 core which > > doesn't have the 36-bit support. Won't enabling 36-bit support by > > default break the support for them? > > No. The kernel will detect at runtime that that it's an e500v1 core and > it won't try to create 36-bit TLBs. (e.g. it won't write to MAS7).
It's a good point. Why can't we decide to use 32-bit/36-bit TLB at runtime even for e500v2? > > Please remember that the Kconfig for the P1022DS already forced > PHYS_64BIT for all mpc85xx platforms. All we're doing is making it > possible to deselect PHYS_64BIT. I think it's a side-effect introduced by P1022DS support and need to be fixed. There was no mentioning of enforcing 36-bit for all mpc85xx platforms. - Leo _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
