*/
/*
- * First half is MMU families
+ * MMU families
*/
#define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001)
#define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002)
#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
#define MMU_FTR_TYPE_47x ASM_CONST(0x00000020)
+/* Radix page table supported and enabled */
+#define MMU_FTR_TYPE_RADIX ASM_CONST(0x00000040)
+
/*
- * This is individual features
+ * Individual features below.
*/
+
/*
* We need to clear top 16bits of va (from the remaining 64 bits )in
* tlbie* instructions
*/
#define MMU_FTR_1T_SEGMENT ASM_CONST(0x40000000)
-/*
- * Radix page table available
- */
-#define MMU_FTR_RADIX ASM_CONST(0x80000000)
-
/* MMU feature bit sets for various CPUs */
#define MMU_FTRS_DEFAULT_HPTE_ARCH_V2 \
MMU_FTR_HPTE_TABLE | MMU_FTR_PPCAS_ARCH_V2
#define MMU_FTRS_PA6T MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \
MMU_FTR_CI_LARGE_PAGE | MMU_FTR_NO_SLBIE_B
#ifndef __ASSEMBLY__
+#include <linux/bug.h>
#include <asm/cputable.h>
#ifdef CONFIG_PPC_FSL_BOOK3E
MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_CI_LARGE_PAGE |
MMU_FTR_1T_SEGMENT | MMU_FTR_TLBIE_CROP_VA |
#ifdef CONFIG_PPC_RADIX_MMU
- MMU_FTR_RADIX |
+ MMU_FTR_TYPE_RADIX |
#endif
0,
};
-static inline int mmu_has_feature(unsigned long feature)
+static inline bool early_mmu_has_feature(unsigned long feature)
+{
+ return !!(MMU_FTRS_POSSIBLE & cur_cpu_spec->mmu_features & feature);
+}
+
+#ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS
+#include <linux/jump_label.h>
+
+#define NUM_MMU_FTR_KEYS 32
+
+extern struct static_key_true mmu_feature_keys[NUM_MMU_FTR_KEYS];
+
+extern void mmu_feature_keys_init(void);
+
+static __always_inline bool mmu_has_feature(unsigned long feature)
+{
+ int i;
+
+ BUILD_BUG_ON(!__builtin_constant_p(feature));
+
+#ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
+ if (!static_key_initialized) {
+ printk("Warning! mmu_has_feature() used prior to jump label init!\n");
+ dump_stack();
+ return early_mmu_has_feature(feature);
+ }
+#endif
+
+ if (!(MMU_FTRS_POSSIBLE & feature))
+ return false;
+
+ i = __builtin_ctzl(feature);
+ return static_branch_likely(&mmu_feature_keys[i]);
+}
+
+static inline void mmu_clear_feature(unsigned long feature)
+{
+ int i;
+
+ i = __builtin_ctzl(feature);
+ cur_cpu_spec->mmu_features &= ~feature;
+ static_branch_disable(&mmu_feature_keys[i]);
+}
+#else
+
+static inline void mmu_feature_keys_init(void)
+{
+
+}
+
+static inline bool mmu_has_feature(unsigned long feature)
{
- return (MMU_FTRS_POSSIBLE & cur_cpu_spec->mmu_features & feature);
+ return early_mmu_has_feature(feature);
}
static inline void mmu_clear_feature(unsigned long feature)
{
cur_cpu_spec->mmu_features &= ~feature;
}
+#endif /* CONFIG_JUMP_LABEL */
extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
* make it match the size our of bolted TLB area
*/
extern u64 ppc64_rma_size;
+
+/* Cleanup function used by kexec */
+extern void mmu_cleanup_all(void);
+extern void radix__mmu_cleanup_all(void);
#endif /* CONFIG_PPC64 */
struct mm_struct;
}
#endif /* !CONFIG_DEBUG_VM */
+#ifdef CONFIG_PPC_RADIX_MMU
+static inline bool radix_enabled(void)
+{
+ return mmu_has_feature(MMU_FTR_TYPE_RADIX);
+}
+
+static inline bool early_radix_enabled(void)
+{
+ return early_mmu_has_feature(MMU_FTR_TYPE_RADIX);
+}
+#else
+static inline bool radix_enabled(void)
+{
+ return false;
+}
+
+static inline bool early_radix_enabled(void)
+{
+ return false;
+}
+#endif
+
#endif /* !__ASSEMBLY__ */
/* The kernel use the constants below to index in the page sizes array.
extern void early_init_mmu_secondary(void);
extern void setup_initial_memory_limit(phys_addr_t first_memblock_base,
phys_addr_t first_memblock_size);
+static inline void mmu_early_init_devtree(void) { }
#endif /* __ASSEMBLY__ */
#endif
# include <asm/mmu-8xx.h>
#endif
-#ifndef radix_enabled
-#define radix_enabled() (0)
-#endif
-
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MMU_H_ */