[SPARC64]: Add a secondary TSB for hugepage mappings.

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 61 insertions, 30 deletions

diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index c66a81b..9d6a6db 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -71,7 +71,8 @@ struct trap_per_cpu {
 /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list.  */
 	unsigned long		cpu_mondo_block_pa;
 	unsigned long		cpu_list_pa;
-	unsigned long		__pad1[2];
+	unsigned long		tsb_huge;
+	unsigned long		tsb_huge_temp;
 
 /* Dcache line 8: Unused, needed to keep trap_block a power-of-2 in size.  */
 	unsigned long		__pad2[4];
@@ -116,6 +117,8 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 #define TRAP_PER_CPU_FAULT_INFO		0x40
 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA	0xc0
 #define TRAP_PER_CPU_CPU_LIST_PA	0xc8
+#define TRAP_PER_CPU_TSB_HUGE		0xd0
+#define TRAP_PER_CPU_TSB_HUGE_TEMP	0xd8
 
 #define TRAP_BLOCK_SZ_SHIFT		8
 
diff --git a/include/asm-sparc64/mmu.h b/include/asm-sparc64/mmu.h
index 230ba67..2d4f2ea 100644
--- a/include/asm-sparc64/mmu.h
+++ b/include/asm-sparc64/mmu.h
@@ -90,18 +90,39 @@ extern void __tsb_insert(unsigned long ent, unsigned long tag, unsigned long pte
 extern void tsb_flush(unsigned long ent, unsigned long tag);
 extern void tsb_init(struct tsb *tsb, unsigned long size);
 
-typedef struct {
-	spinlock_t		lock;
-	unsigned long		sparc64_ctx_val;
+struct tsb_config {
 	struct tsb		*tsb;
 	unsigned long		tsb_rss_limit;
 	unsigned long		tsb_nentries;
 	unsigned long		tsb_reg_val;
 	unsigned long		tsb_map_vaddr;
 	unsigned long		tsb_map_pte;
-	struct hv_tsb_descr	tsb_descr;
+};
+
+#define MM_TSB_BASE	0
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define MM_TSB_HUGE	1
+#define MM_NUM_TSBS	2
+#else
+#define MM_NUM_TSBS	1
+#endif
+
+typedef struct {
+	spinlock_t		lock;
+	unsigned long		sparc64_ctx_val;
+	unsigned long		huge_pte_count;
+	struct tsb_config	tsb_block[MM_NUM_TSBS];
+	struct hv_tsb_descr	tsb_descr[MM_NUM_TSBS];
 } mm_context_t;
 
 #endif /* !__ASSEMBLY__ */
 
+#define TSB_CONFIG_TSB		0x00
+#define TSB_CONFIG_RSS_LIMIT	0x08
+#define TSB_CONFIG_NENTRIES	0x10
+#define TSB_CONFIG_REG_VAL	0x18
+#define TSB_CONFIG_MAP_VADDR	0x20
+#define TSB_CONFIG_MAP_PTE	0x28
+
 #endif /* __MMU_H */
diff --git a/include/asm-sparc64/mmu_context.h b/include/asm-sparc64/mmu_context.h
index e797432..2337eb4 100644
--- a/include/asm-sparc64/mmu_context.h
+++ b/include/asm-sparc64/mmu_context.h
@@ -29,20 +29,25 @@ extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
 extern void destroy_context(struct mm_struct *mm);
 
 extern void __tsb_context_switch(unsigned long pgd_pa,
-				 unsigned long tsb_reg,
-				 unsigned long tsb_vaddr,
-				 unsigned long tsb_pte,
+				 struct tsb_config *tsb_base,
+				 struct tsb_config *tsb_huge,
 				 unsigned long tsb_descr_pa);
 
 static inline void tsb_context_switch(struct mm_struct *mm)
 {
-	__tsb_context_switch(__pa(mm->pgd), mm->context.tsb_reg_val,
-			     mm->context.tsb_map_vaddr,
-			     mm->context.tsb_map_pte,
-			     __pa(&mm->context.tsb_descr));
+	__tsb_context_switch(__pa(mm->pgd),
+			     &mm->context.tsb_block[0],
+#ifdef CONFIG_HUGETLB_PAGE
+			     (mm->context.tsb_block[1].tsb ?
+			      &mm->context.tsb_block[1] :
+			      NULL)
+#else
+			     NULL
+#endif
+			     , __pa(&mm->context.tsb_descr[0]));
 }
 
-extern void tsb_grow(struct mm_struct *mm, unsigned long mm_rss);
+extern void tsb_grow(struct mm_struct *mm, unsigned long tsb_index, unsigned long mm_rss);
 #ifdef CONFIG_SMP
 extern void smp_tsb_sync(struct mm_struct *mm);
 #else
diff --git a/include/asm-sparc64/page.h b/include/asm-sparc64/page.h
index fcb2812..66fe4ac 100644
--- a/include/asm-sparc64/page.h
+++ b/include/asm-sparc64/page.h
@@ -30,6 +30,23 @@
 
 #ifdef __KERNEL__
 
+#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
+#define HPAGE_SHIFT		22
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
+#define HPAGE_SHIFT		19
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
+#define HPAGE_SHIFT		16
+#endif
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
+#define HPAGE_MASK		(~(HPAGE_SIZE - 1UL))
+#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+#endif
+
 #ifndef __ASSEMBLY__
 
 extern void _clear_page(void *page);
@@ -90,23 +107,6 @@ typedef unsigned long pgprot_t;
 
 #endif /* (STRICT_MM_TYPECHECKS) */
 
-#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
-#define HPAGE_SHIFT		22
-#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
-#define HPAGE_SHIFT		19
-#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
-#define HPAGE_SHIFT		16
-#endif
-
-#ifdef CONFIG_HUGETLB_PAGE
-#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
-#define HPAGE_MASK		(~(HPAGE_SIZE - 1UL))
-#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
-#define ARCH_HAS_SETCLEAR_HUGE_PTE
-#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
-#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-#endif
-
 #define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_32BIT) ? \
 				 (_AC(0x0000000070000000,UL)) : \
 				 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index ed4124e..c44e746 100644
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -105,6 +105,7 @@
 #define _PAGE_RES1_4U	  _AC(0x0002000000000000,UL) /* Reserved             */
 #define _PAGE_SZ32MB_4U	  _AC(0x0001000000000000,UL) /* (Panther) 32MB page  */
 #define _PAGE_SZ256MB_4U  _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
+#define _PAGE_SZALL_4U	  _AC(0x6001000000000000,UL) /* All pgsz bits        */
 #define _PAGE_SN_4U	  _AC(0x0000800000000000,UL) /* (Cheetah) Snoop      */
 #define _PAGE_RES2_4U	  _AC(0x0000780000000000,UL) /* Reserved             */
 #define _PAGE_PADDR_4U	  _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13]  */
@@ -150,6 +151,7 @@
 #define _PAGE_SZ512K_4V	  _AC(0x0000000000000002,UL) /* 512K Page            */
 #define _PAGE_SZ64K_4V	  _AC(0x0000000000000001,UL) /* 64K Page             */
 #define _PAGE_SZ8K_4V	  _AC(0x0000000000000000,UL) /* 8K Page              */
+#define _PAGE_SZALL_4V	  _AC(0x0000000000000007,UL) /* All pgsz bits        */
 
 #if PAGE_SHIFT == 13
 #define _PAGE_SZBITS_4U	_PAGE_SZ8K_4U