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Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/hash.h')
-rw-r--r--arch/powerpc/include/asm/book3s/64/hash.h32
1 files changed, 23 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h
index 247aff9cc6ba..54b7af6cd27f 100644
--- a/arch/powerpc/include/asm/book3s/64/hash.h
+++ b/arch/powerpc/include/asm/book3s/64/hash.h
@@ -40,22 +40,36 @@
#else
#define H_PUD_CACHE_INDEX (H_PUD_INDEX_SIZE)
#endif
+
/*
- * Define the address range of the kernel non-linear virtual area
+ * Define the address range of the kernel non-linear virtual area. In contrast
+ * to the linear mapping, this is managed using the kernel page tables and then
+ * inserted into the hash page table to actually take effect, similarly to user
+ * mappings.
*/
#define H_KERN_VIRT_START ASM_CONST(0xD000000000000000)
-#define H_KERN_VIRT_SIZE ASM_CONST(0x0000400000000000) /* 64T */
/*
- * The vmalloc space starts at the beginning of that region, and
- * occupies half of it on hash CPUs and a quarter of it on Book3E
- * (we keep a quarter for the virtual memmap)
+ * Allow virtual mapping of one context size.
+ * 512TB for 64K page size
+ * 64TB for 4K page size
+ */
+#define H_KERN_VIRT_SIZE (1UL << MAX_EA_BITS_PER_CONTEXT)
+
+/*
+ * 8TB IO mapping size
+ */
+#define H_KERN_IO_SIZE ASM_CONST(0x80000000000) /* 8T */
+
+/*
+ * The vmalloc space starts at the beginning of the kernel non-linear virtual
+ * region, and occupies 504T (64K) or 56T (4K)
*/
-#define H_VMALLOC_START H_KERN_VIRT_START
-#define H_VMALLOC_SIZE ASM_CONST(0x380000000000) /* 56T */
-#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE)
+#define H_VMALLOC_START H_KERN_VIRT_START
+#define H_VMALLOC_SIZE (H_KERN_VIRT_SIZE - H_KERN_IO_SIZE)
+#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE)
-#define H_KERN_IO_START H_VMALLOC_END
+#define H_KERN_IO_START H_VMALLOC_END
/*
* Region IDs