[SPARC64]: Do not call winfix_dax blindly
Verify we really are taking a data access exception trap, at TL1, from one of the window spill/fill handlers. Else call a new function, data_access_exception_tl1, to log the error. Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -701,8 +701,24 @@ __do_data_access_exception_tl1:
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ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
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ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
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stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
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stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
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membar #Sync
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membar #Sync
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rdpr %tt, %g3
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cmp %g3, 0x80 ! first win spill/fill trap
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blu,pn %xcc, 1f
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cmp %g3, 0xff ! last win spill/fill trap
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bgu,pn %xcc, 1f
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nop
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ba,pt %xcc, winfix_dax
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ba,pt %xcc, winfix_dax
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rdpr %tpc, %g3
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rdpr %tpc, %g3
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1: sethi %hi(109f), %g7
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ba,pt %xcc, etraptl1
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109: or %g7, %lo(109b), %g7
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mov %l4, %o1
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mov %l5, %o2
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call data_access_exception_tl1
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add %sp, PTREGS_OFF, %o0
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ba,pt %xcc, rtrap
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clr %l6
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__do_data_access_exception:
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__do_data_access_exception:
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rdpr %pstate, %g4
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rdpr %pstate, %g4
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
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@ -220,6 +220,17 @@ void data_access_exception(struct pt_regs *regs,
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force_sig_info(SIGSEGV, &info, current);
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force_sig_info(SIGSEGV, &info, current);
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}
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}
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void data_access_exception_tl1(struct pt_regs *regs,
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unsigned long sfsr, unsigned long sfar)
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{
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if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
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0, 0x30, SIGTRAP) == NOTIFY_STOP)
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return;
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dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
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data_access_exception(regs, sfsr, sfar);
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}
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#ifdef CONFIG_PCI
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#ifdef CONFIG_PCI
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/* This is really pathetic... */
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/* This is really pathetic... */
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extern volatile int pci_poke_in_progress;
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extern volatile int pci_poke_in_progress;
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