diff options
Diffstat (limited to 'arch/powerpc/mm/init_64.c')
| -rw-r--r-- | arch/powerpc/mm/init_64.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 3e5f9ac9dded..35f46bf54281 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -472,8 +472,12 @@ void __init mmu_early_init_devtree(void) bool hvmode = !!(mfmsr() & MSR_HV); /* Disable radix mode based on kernel command line. */ - if (disable_radix) - cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + if (disable_radix) { + if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU)) + cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX; + else + pr_warn("WARNING: Ignoring cmdline option disable_radix\n"); + } of_scan_flat_dt(dt_scan_mmu_pid_width, NULL); if (hvmode && !mmu_lpid_bits) { @@ -498,6 +502,7 @@ void __init mmu_early_init_devtree(void) if (early_radix_enabled()) { radix__early_init_devtree(); + /* * We have finalized the translation we are going to use by now. * Radix mode is not limited by RMA / VRMA addressing. @@ -507,5 +512,9 @@ void __init mmu_early_init_devtree(void) memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE); } else hash__early_init_devtree(); + + if (!(cur_cpu_spec->mmu_features & MMU_FTR_HPTE_TABLE) && + !(cur_cpu_spec->mmu_features & MMU_FTR_TYPE_RADIX)) + panic("kernel does not support any MMU type offered by platform"); } #endif /* CONFIG_PPC_BOOK3S_64 */ |