diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/mm/tlbex.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index c363890368cd..4004b659ce50 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -2431,15 +2431,25 @@ static void config_htw_params(void) if (CONFIG_PGTABLE_LEVELS >= 3) pwsize |= ilog2(PTRS_PER_PMD) << MIPS_PWSIZE_MDW_SHIFT; - pwsize |= ilog2(sizeof(pte_t)/4) << MIPS_PWSIZE_PTEW_SHIFT; + /* Set pointer size to size of directory pointers */ + if (config_enabled(CONFIG_64BIT)) + pwsize |= MIPS_PWSIZE_PS_MASK; + /* PTEs may be multiple pointers long (e.g. with XPA) */ + pwsize |= ((PTE_T_LOG2 - PGD_T_LOG2) << MIPS_PWSIZE_PTEW_SHIFT) + & MIPS_PWSIZE_PTEW_MASK; write_c0_pwsize(pwsize); /* Make sure everything is set before we enable the HTW */ back_to_back_c0_hazard(); - /* Enable HTW and disable the rest of the pwctl fields */ + /* + * Enable HTW (and only for XUSeg on 64-bit), and disable the rest of + * the pwctl fields. + */ config = 1 << MIPS_PWCTL_PWEN_SHIFT; + if (config_enabled(CONFIG_64BIT)) + config |= MIPS_PWCTL_XU_MASK; write_c0_pwctl(config); pr_info("Hardware Page Table Walker enabled\n"); |