6 files changed, 20 insertions, 18 deletions

diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index ca400f7c3f59..63002a240c73 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -95,8 +95,8 @@
 #ifndef cpu_has_smartmips
 #define cpu_has_smartmips      (cpu_data[0].ases & MIPS_ASE_SMARTMIPS)
 #endif
-#ifndef kernel_uses_smartmips_rixi
-#define kernel_uses_smartmips_rixi 0
+#ifndef cpu_has_rixi
+#define cpu_has_rixi            (cpu_data[0].options & MIPS_CPU_RIXI)
 #endif
 #ifndef cpu_has_vtag_icache
 #define cpu_has_vtag_icache     (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index f21b7c04e95a..1037d54f0597 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -319,6 +319,7 @@ enum cpu_type_enum {
 #define MIPS_CPU_VINT           0x00080000 /* CPU supports MIPSR2 vectored interrupts */
 #define MIPS_CPU_VEIC           0x00100000 /* CPU supports MIPSR2 external interrupt controller mode */
 #define MIPS_CPU_ULRI           0x00200000 /* CPU has ULRI feature */
+#define MIPS_CPU_RIXI           0x00400000 /* CPU has TLB Read/eXec Inhibit */
 
 /*
  * CPU ASE encodings
diff --git a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
index a58addb98cfd..375ad0c815fe 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
@@ -58,7 +58,7 @@
 #define cpu_has_veic            0
 #define cpu_hwrena_impl_bits    0xc0000000
 
-#define kernel_uses_smartmips_rixi (cpu_data[0].cputype != CPU_CAVIUM_OCTEON)
+#define cpu_has_rixi            (cpu_data[0].cputype != CPU_CAVIUM_OCTEON)
 
 #define ARCH_HAS_IRQ_PER_CPU    1
 #define ARCH_HAS_SPINLOCK_PREFETCH 1
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 7f87d824eeb0..4199dd3f8d54 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -590,6 +590,7 @@
 #define MIPS_CONF3_VEIC         (_ULCAST_(1) <<  6)
 #define MIPS_CONF3_LPA          (_ULCAST_(1) <<  7)
 #define MIPS_CONF3_DSP          (_ULCAST_(1) << 10)
+#define MIPS_CONF3_RXI          (_ULCAST_(1) << 12)
 #define MIPS_CONF3_ULRI         (_ULCAST_(1) << 13)
 
 #define MIPS_CONF4_MMUSIZEEXT   (_ULCAST_(255) << 0)
diff --git a/arch/mips/include/asm/pgtable-bits.h b/arch/mips/include/asm/pgtable-bits.h
index e9fe7e97ce4c..da4ba49adcf6 100644
--- a/arch/mips/include/asm/pgtable-bits.h
+++ b/arch/mips/include/asm/pgtable-bits.h
@@ -79,9 +79,9 @@
 /* implemented in software */
 #define _PAGE_PRESENT_SHIFT     (0)
 #define _PAGE_PRESENT           (1 << _PAGE_PRESENT_SHIFT)
-/* implemented in software, should be unused if kernel_uses_smartmips_rixi. */
-#define _PAGE_READ_SHIFT        (kernel_uses_smartmips_rixi ? _PAGE_PRESENT_SHIFT : _PAGE_PRESENT_SHIFT + 1)
-#define _PAGE_READ ({if (kernel_uses_smartmips_rixi) BUG(); 1 << _PAGE_READ_SHIFT; })
+/* implemented in software, should be unused if cpu_has_rixi. */
+#define _PAGE_READ_SHIFT        (cpu_has_rixi ? _PAGE_PRESENT_SHIFT : _PAGE_PRESENT_SHIFT + 1)
+#define _PAGE_READ ({BUG_ON(cpu_has_rixi); 1 << _PAGE_READ_SHIFT; })
 /* implemented in software */
 #define _PAGE_WRITE_SHIFT       (_PAGE_READ_SHIFT + 1)
 #define _PAGE_WRITE             (1 << _PAGE_WRITE_SHIFT)
@@ -104,12 +104,12 @@
 #endif
 
 /* Page cannot be executed */
-#define _PAGE_NO_EXEC_SHIFT     (kernel_uses_smartmips_rixi ? _PAGE_HUGE_SHIFT + 1 : _PAGE_HUGE_SHIFT)
-#define _PAGE_NO_EXEC           ({if (!kernel_uses_smartmips_rixi) BUG(); 1 << _PAGE_NO_EXEC_SHIFT; })
+#define _PAGE_NO_EXEC_SHIFT     (cpu_has_rixi ? _PAGE_HUGE_SHIFT + 1 : _PAGE_HUGE_SHIFT)
+#define _PAGE_NO_EXEC           ({BUG_ON(!cpu_has_rixi); 1 << _PAGE_NO_EXEC_SHIFT; })
 
 /* Page cannot be read */
-#define _PAGE_NO_READ_SHIFT     (kernel_uses_smartmips_rixi ? _PAGE_NO_EXEC_SHIFT + 1 : _PAGE_NO_EXEC_SHIFT)
-#define _PAGE_NO_READ           ({if (!kernel_uses_smartmips_rixi) BUG(); 1 << _PAGE_NO_READ_SHIFT; })
+#define _PAGE_NO_READ_SHIFT     (cpu_has_rixi ? _PAGE_NO_EXEC_SHIFT + 1 : _PAGE_NO_EXEC_SHIFT)
+#define _PAGE_NO_READ           ({BUG_ON(!cpu_has_rixi); 1 << _PAGE_NO_READ_SHIFT; })
 
 #define _PAGE_GLOBAL_SHIFT      (_PAGE_NO_READ_SHIFT + 1)
 #define _PAGE_GLOBAL            (1 << _PAGE_GLOBAL_SHIFT)
@@ -155,7 +155,7 @@
  */
 static inline uint64_t pte_to_entrylo(unsigned long pte_val)
 {
-        if (kernel_uses_smartmips_rixi) {
+        if (cpu_has_rixi) {
                 int sa;
 #ifdef CONFIG_32BIT
                 sa = 31 - _PAGE_NO_READ_SHIFT;
@@ -220,7 +220,7 @@ static inline uint64_t pte_to_entrylo(unsigned long pte_val)
 
 #endif
 
-#define __READABLE      (_PAGE_SILENT_READ | _PAGE_ACCESSED | (kernel_uses_smartmips_rixi ? 0 : _PAGE_READ))
+#define __READABLE      (_PAGE_SILENT_READ | _PAGE_ACCESSED | (cpu_has_rixi ? 0 : _PAGE_READ))
 #define __WRITEABLE     (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED)
 
 #define _PAGE_CHG_MASK  (_PFN_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | _CACHE_MASK)
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index b2202a68cf0f..c02158be836c 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -22,15 +22,15 @@ struct mm_struct;
 struct vm_area_struct;
 
 #define PAGE_NONE       __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT)
-#define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_WRITE | (kernel_uses_smartmips_rixi ? 0 : _PAGE_READ) | \
+#define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_WRITE | (cpu_has_rixi ? 0 : _PAGE_READ) | \
                                  _page_cachable_default)
-#define PAGE_COPY       __pgprot(_PAGE_PRESENT | (kernel_uses_smartmips_rixi ? 0 : _PAGE_READ) | \
-                                 (kernel_uses_smartmips_rixi ?  _PAGE_NO_EXEC : 0) | _page_cachable_default)
-#define PAGE_READONLY   __pgprot(_PAGE_PRESENT | (kernel_uses_smartmips_rixi ? 0 : _PAGE_READ) | \
+#define PAGE_COPY       __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \
+                                 (cpu_has_rixi ?  _PAGE_NO_EXEC : 0) | _page_cachable_default)
+#define PAGE_READONLY   __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \
                                  _page_cachable_default)
 #define PAGE_KERNEL     __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
                                  _PAGE_GLOBAL | _page_cachable_default)
-#define PAGE_USERIO     __pgprot(_PAGE_PRESENT | (kernel_uses_smartmips_rixi ? 0 : _PAGE_READ) | _PAGE_WRITE | \
+#define PAGE_USERIO     __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | _PAGE_WRITE | \
                                  _page_cachable_default)
 #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
                         __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)
@@ -299,7 +299,7 @@ static inline pte_t pte_mkdirty(pte_t pte)
 static inline pte_t pte_mkyoung(pte_t pte)
 {
         pte_val(pte) |= _PAGE_ACCESSED;
-        if (kernel_uses_smartmips_rixi) {
+        if (cpu_has_rixi) {
                 if (!(pte_val(pte) & _PAGE_NO_READ))
                         pte_val(pte) |= _PAGE_SILENT_READ;
         } else {