From 6c8927c9634e8a1bc95d5291c55205707f9fa40a Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 17 Feb 2006 14:58:02 -0800 Subject: [SPARC64]: Fix some SUN4V TLB handling bugs. 1) Add error return checking for TLB load hypervisor calls. 2) Don't fallthru to dtlb tsb miss handler from itlb tsb miss handler, oops. 3) On window fixups, propagate fault information to fixup handler correctly. Signed-off-by: David S. Miller --- arch/sparc64/kernel/sun4v_tlb_miss.S | 57 ++++++++++++++++++++++++++++++++++-- 1 file changed, 55 insertions(+), 2 deletions(-) (limited to 'arch/sparc64/kernel/sun4v_tlb_miss.S') diff --git a/arch/sparc64/kernel/sun4v_tlb_miss.S b/arch/sparc64/kernel/sun4v_tlb_miss.S index df65d712dcc..244d50de849 100644 --- a/arch/sparc64/kernel/sun4v_tlb_miss.S +++ b/arch/sparc64/kernel/sun4v_tlb_miss.S @@ -84,8 +84,9 @@ sun4v_itlb_load: mov %g3, %o2 ! PTE mov HV_MMU_IMMU, %o3 ! flags ta HV_MMU_MAP_ADDR_TRAP + brnz,pn %o0, sun4v_itlb_error + mov %g2, %o1 ! restore %o1 mov %g1, %o0 ! restore %o0 - mov %g2, %o1 ! restore %o1 mov %g5, %o2 ! restore %o2 mov %g7, %o3 ! restore %o3 @@ -126,8 +127,9 @@ sun4v_dtlb_load: mov %g3, %o2 ! PTE mov HV_MMU_DMMU, %o3 ! flags ta HV_MMU_MAP_ADDR_TRAP + brnz,pn %o0, sun4v_dtlb_error + mov %g2, %o1 ! restore %o1 mov %g1, %o0 ! restore %o0 - mov %g2, %o1 ! restore %o1 mov %g5, %o2 ! restore %o2 mov %g7, %o3 ! restore %o3 @@ -154,6 +156,7 @@ sun4v_itsb_miss: ldxa [%g1] ASI_SCRATCHPAD, %g1 brz,pn %g5, kvmap_itlb_4v mov FAULT_CODE_ITLB, %g3 + ba,a,pt %xcc, sun4v_tsb_miss_common /* Called from trap table with TAG TARGET placed into * %g6 and SCRATCHPAD_UTSBREG1 contents in %g1. @@ -182,6 +185,56 @@ sun4v_tsb_miss_common: ba,pt %xcc, tsb_miss_page_table_walk_sun4v_fastpath ldx [%g2 + TRAP_PER_CPU_PGD_PADDR], %g7 +sun4v_itlb_error: + sethi %hi(sun4v_err_itlb_vaddr), %g1 + stx %g4, [%g1 + %lo(sun4v_err_itlb_vaddr)] + sethi %hi(sun4v_err_itlb_ctx), %g1 + srlx %g6, 48, %o1 ! ctx + stx %o1, [%g1 + %lo(sun4v_err_itlb_ctx)] + sethi %hi(sun4v_err_itlb_pte), %g1 + stx %g3, [%g1 + %lo(sun4v_err_itlb_pte)] + sethi %hi(sun4v_err_itlb_error), %g1 + stx %o0, [%g1 + %lo(sun4v_err_itlb_error)] + + rdpr %tl, %g4 + cmp %g4, 1 + ble,pt %icc, 1f + sethi %hi(2f), %g7 + ba,pt %xcc, etraptl1 + or %g7, %lo(2f), %g7 + +1: ba,pt %xcc, etrap +2: or %g7, %lo(2b), %g7 + call sun4v_itlb_error_report + add %sp, PTREGS_OFF, %o0 + + /* NOTREACHED */ + +sun4v_dtlb_error: + sethi %hi(sun4v_err_dtlb_vaddr), %g1 + stx %g4, [%g1 + %lo(sun4v_err_dtlb_vaddr)] + sethi %hi(sun4v_err_dtlb_ctx), %g1 + srlx %g6, 48, %o1 ! ctx + stx %o1, [%g1 + %lo(sun4v_err_dtlb_ctx)] + sethi %hi(sun4v_err_dtlb_pte), %g1 + stx %g3, [%g1 + %lo(sun4v_err_dtlb_pte)] + sethi %hi(sun4v_err_dtlb_error), %g1 + stx %o0, [%g1 + %lo(sun4v_err_dtlb_error)] + + rdpr %tl, %g4 + cmp %g4, 1 + ble,pt %icc, 1f + sethi %hi(2f), %g7 + ba,pt %xcc, etraptl1 + or %g7, %lo(2f), %g7 + +1: ba,pt %xcc, etrap +2: or %g7, %lo(2b), %g7 + call sun4v_dtlb_error_report + add %sp, PTREGS_OFF, %o0 + + /* NOTREACHED */ + /* Instruction Access Exception, tl0. */ sun4v_iacc: ldxa [%g0] ASI_SCRATCHPAD, %g2 -- cgit v1.2.3