SPARC v9: __tsb_context_switch - demap old tsb_map_vaddr --- When TSB context switches in the function switch_mm() the following situation could occur. We have old mapping between physical address and tsb_map_vaddr in uTLB, and new mapping is written in fDTLB. Because uDTLB has more priority than fDTLB, all transformations occur through it, and TSB Pointer in tl0_damiss will be formed with the wrong physical address. To prevent this, we need to flush old tsb_map_vaddr (TSB_BASE) in TLB. Kernel version 2.6.35.7. Signed-off-by: Tkhai Kirill <tkhai@xxxxxxxxx> --- --- arch/sparc/kernel/tsb.S.orig 2010-10-05 19:46:55.272218523 +0400 +++ arch/sparc/kernel/tsb.S 2010-10-05 19:48:56.136235329 +0400 @@ -396,6 +396,9 @@ __tsb_context_switch: 2: ldx [%o1 + TSB_CONFIG_MAP_VADDR], %o4 brz %o4, 9f + or %o4, 1 << 5, %o5 + stxa %g0, [%o5] ASI_DMMU_DEMAP + membar #Sync ldx [%o1 + TSB_CONFIG_MAP_PTE], %o5 sethi %hi(sparc64_highest_unlocked_tlb_ent), %g2 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
