[SPARC64]: Fix _PAGE_EXEC handling.
First of all, use the known _PAGE_EXEC_{4U,4V} value instead
of loading _PAGE_EXEC from memory. We either know which one
to use by context, or we can code patch the test.
Next, we need to check executability of a PTE in the generic
TSB miss handler.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/itlb_miss.S b/arch/sparc64/kernel/itlb_miss.S
index 6dfe396..ad46e20 100644
--- a/arch/sparc64/kernel/itlb_miss.S
+++ b/arch/sparc64/kernel/itlb_miss.S
@@ -9,18 +9,18 @@
cmp %g4, %g6 ! Compare TAG
/* ITLB ** ICACHE line 2: TSB compare and TLB load */
- sethi %hi(PAGE_EXEC), %g4 ! Setup exec check
- ldx [%g4 + %lo(PAGE_EXEC)], %g4
bne,pn %xcc, tsb_miss_itlb ! Miss
mov FAULT_CODE_ITLB, %g3
- andcc %g5, %g4, %g0 ! Executable?
+ andcc %g5, _PAGE_EXEC_4U, %g0 ! Executable?
be,pn %xcc, tsb_do_fault
nop ! Delay slot, fill me
+ stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
+ retry ! Trap done
nop
/* ITLB ** ICACHE line 3: */
- stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB
- retry ! Trap done
+ nop
+ nop
nop
nop
nop
diff --git a/arch/sparc64/kernel/sun4v_tlb_miss.S b/arch/sparc64/kernel/sun4v_tlb_miss.S
index 3dccbd6..3eed8db 100644
--- a/arch/sparc64/kernel/sun4v_tlb_miss.S
+++ b/arch/sparc64/kernel/sun4v_tlb_miss.S
@@ -58,11 +58,9 @@
/* Load TSB tag/pte into %g2/%g3 and compare the tag. */
ldda [%g1] ASI_QUAD_LDD_PHYS_4V, %g2
cmp %g2, %g6
- sethi %hi(PAGE_EXEC), %g7
- ldx [%g7 + %lo(PAGE_EXEC)], %g7
bne,a,pn %xcc, tsb_miss_page_table_walk
mov FAULT_CODE_ITLB, %g3
- andcc %g3, %g7, %g0
+ andcc %g3, _PAGE_EXEC_4V, %g0
be,a,pn %xcc, tsb_do_fault
mov FAULT_CODE_ITLB, %g3
diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S
index cc225c0..563852b 100644
--- a/arch/sparc64/kernel/tsb.S
+++ b/arch/sparc64/kernel/tsb.S
@@ -103,6 +103,15 @@
mov %g5, %g3
tsb_itlb_load:
+ /* Executable bit must be set. */
+661: andcc %g5, _PAGE_EXEC_4U, %g0
+ .section .sun4v_1insn_patch, "ax"
+ .word 661b
+ andcc %g5, _PAGE_EXEC_4V, %g0
+ .previous
+
+ be,pn %xcc, tsb_do_fault
+ nop
661: stxa %g5, [%g0] ASI_ITLB_DATA_IN
retry