diff options
| author | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-03-16 04:04:32 +0000 |
|---|---|---|
| committer | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-03-16 04:04:32 +0000 |
| commit | f91ca86d6e89dddf17baf2f79936ed3cf2feb5ac (patch) | |
| tree | b22de9cabd6178b0a40486c617d2da8311a8bbca /arch | |
| parent | b64bbed64fa5444942bed0a937173e52b589ed87 (diff) | |
The fast tlb handlers [x]tlb_refill_debug blindly look at pgd/pmd/ptes.
So, _all_ page tables in the system _must_ be 2 pages, including
empty_bad_page_table. And, the invalid page table _must_ be initialized
to all invalid entries, so that even if the fast handler picks something
up from an unallocated pmd/ptetable, the processor takes a mm fault.
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips64/kernel/head.S | 2 | ||||
| -rw-r--r-- | arch/mips64/mm/init.c | 3 | ||||
| -rw-r--r-- | arch/mips64/sgi-ip27/ip27-memory.c | 1 |
3 files changed, 4 insertions, 2 deletions
diff --git a/arch/mips64/kernel/head.S b/arch/mips64/kernel/head.S index 3dae9b52c..0928b2b09 100644 --- a/arch/mips64/kernel/head.S +++ b/arch/mips64/kernel/head.S @@ -81,5 +81,5 @@ NESTED(kernel_entry, 16, sp) # kernel entry point page swapper_pg_dir, 1 page invalid_pte_table, 1 page invalid_pmd_table, 1 + page empty_bad_page_table, 1 page empty_bad_page - page empty_bad_page_table diff --git a/arch/mips64/mm/init.c b/arch/mips64/mm/init.c index ae17a6d91..42dece549 100644 --- a/arch/mips64/mm/init.c +++ b/arch/mips64/mm/init.c @@ -252,7 +252,7 @@ extern inline void pte_init(unsigned long page) bp = pte_val(BAD_PAGE); p = (unsigned long *) page; - end = p + PTRS_PER_PTE; + end = p + (2 * PTRS_PER_PTE); while (p < end) { p[0] = p[1] = p[2] = p[3] = @@ -348,6 +348,7 @@ void __init paging_init(void) /* Initialize the entire pgd. */ pgd_init((unsigned long)swapper_pg_dir); pmd_init((unsigned long)invalid_pmd_table); + memset((void *)invalid_pte_table, 0, sizeof(pte_t) * 2 * PTRS_PER_PTE); max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; low = max_low_pfn; diff --git a/arch/mips64/sgi-ip27/ip27-memory.c b/arch/mips64/sgi-ip27/ip27-memory.c index 88ea07dc8..eb5ac3c87 100644 --- a/arch/mips64/sgi-ip27/ip27-memory.c +++ b/arch/mips64/sgi-ip27/ip27-memory.c @@ -274,6 +274,7 @@ void __init paging_init(void) /* Initialize the entire pgd. */ pgd_init((unsigned long)swapper_pg_dir); pmd_init((unsigned long)invalid_pmd_table); + memset((void *)invalid_pte_table, 0, sizeof(pte_t) * 2 * PTRS_PER_PTE); for (node = 0; node < numnodes; node++) { pfn_t start_pfn = slot_getbasepfn(node, 0); |