# Re: \[PATCH v5 15/17\] powerpc/64s: Make hash MMU support configurable - From: Fabiano Rosas \ - Date: 2021-11-29 13:47:38 - List: linuxppc-dev - Page: https://ratatoskr.run/linuxppc-dev/2021/11/9525357 - Thread: https://ratatoskr.run/linuxppc-dev/2021/11/9525334/t.md ```text Nicholas Piggin [ref] writes: > This adds Kconfig selection which allows 64s hash MMU support to be > disabled. It can be disabled if radix support is enabled, the minimum > supported CPU type is POWER9 (or higher), and KVM is not selected. > > Signed-off-by: Nicholas Piggin > --- > arch/powerpc/Kconfig | 3 ++- > arch/powerpc/include/asm/mmu.h | 16 +++++++++++++--- > arch/powerpc/kernel/dt_cpu_ftrs.c | 14 ++++++++++---- > arch/powerpc/kvm/Kconfig | 1 + > arch/powerpc/mm/init_64.c | 13 +++++++++++-- > arch/powerpc/platforms/Kconfig.cputype | 23 +++++++++++++++++++++-- > arch/powerpc/platforms/cell/Kconfig | 1 + > arch/powerpc/platforms/maple/Kconfig | 1 + > arch/powerpc/platforms/microwatt/Kconfig | 2 +- > arch/powerpc/platforms/pasemi/Kconfig | 1 + > arch/powerpc/platforms/powermac/Kconfig | 1 + > arch/powerpc/platforms/powernv/Kconfig | 2 +- powernv_defconfig brings CONFIG_CXL=m ../drivers/misc/cxl/main.c: In function ‘cxl_alloc_sst’: ../drivers/misc/cxl/main.c:127:45: error: ‘mmu_linear_psize’ undeclared (first use in this function); did you mean ‘mmu_virtual_psize’? 127 | sstp0 |= (SLB_VSID_KERNEL | mmu_psize_defs[mmu_linear_psize].sllp) << 50; | ^~~~~~~~~~~~~~~~ | mmu_virtual_psize ../drivers/misc/cxl/main.c:127:45: note: each undeclared identifier is reported only once for each function it appears in make[4]: *** [../scripts/Makefile.build:287: drivers/misc/cxl/main.o] Error 1 ```