diff options
Diffstat (limited to 'arch/powerpc/mm/tlb_nohash.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index 723a099f6be3..a7381fbdd6ab 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -42,6 +42,7 @@ #include <asm/tlbflush.h> #include <asm/tlb.h> #include <asm/code-patching.h> +#include <asm/cputhreads.h> #include <asm/hugetlb.h> #include <asm/paca.h> @@ -628,10 +629,26 @@ static void early_init_this_mmu(void) #ifdef CONFIG_PPC_FSL_BOOK3E if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) { unsigned int num_cams; + int __maybe_unused cpu = smp_processor_id(); + bool map = true; /* use a quarter of the TLBCAM for bolted linear map */ num_cams = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) / 4; - linear_map_top = map_mem_in_cams(linear_map_top, num_cams); + + /* + * Only do the mapping once per core, or else the + * transient mapping would cause problems. + */ +#ifdef CONFIG_SMP + if (cpu != boot_cpuid && + (cpu != cpu_first_thread_sibling(cpu) || + cpu == cpu_first_thread_sibling(boot_cpuid))) + map = false; +#endif + + if (map) + linear_map_top = map_mem_in_cams(linear_map_top, + num_cams); } #endif |