[SPARC64]: Register per-cpu fault status area with sun4v hypervisor.

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

1 files changed, 25 insertions, 4 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index e9aac424877f..4c95cf34075b 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -40,6 +40,7 @@
 #include <asm/spitfire.h>
 #include <asm/sections.h>
 #include <asm/tsb.h>
+#include <asm/hypervisor.h>
 
 extern void device_scan(void);
 
@@ -1083,6 +1084,24 @@ static void __init tsb_phys_patch(void)
         }
 }
 
+/* Register this cpu's fault status area with the hypervisor.  */
+void __cpuinit sun4v_register_fault_status(void)
+{
+        register unsigned long arg0 asm("%o0");
+        register unsigned long arg1 asm("%o1");
+        int cpu = hard_smp_processor_id();
+        struct trap_per_cpu *tb = &trap_block[cpu];
+        unsigned long pa;
+
+        pa = kern_base + ((unsigned long) tb - KERNBASE);
+        arg0 = HV_FAST_MMU_FAULT_AREA_CONF;
+        arg1 = pa;
+        __asm__ __volatile__("ta        %4"
+                             : "=&r" (arg0), "=&r" (arg1)
+                             : "0" (arg0), "1" (arg1),
+                               "i" (HV_FAST_TRAP));
+}
+
 /* paging_init() sets up the page tables */
 
 extern void cheetah_ecache_flush_init(void);
@@ -1096,12 +1115,17 @@ void __init paging_init(void)
         unsigned long end_pfn, pages_avail, shift;
         unsigned long real_end, i;
 
+        kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
+        kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
+
         if (tlb_type == cheetah_plus ||
             tlb_type == hypervisor)
                 tsb_phys_patch();
 
-        if (tlb_type == hypervisor)
+        if (tlb_type == hypervisor) {
                 sun4v_patch_tlb_handlers();
+                sun4v_register_fault_status();
+        }
 
         /* Find available physical memory... */
         read_obp_memory("available", &pavail[0], &pavail_ents);
@@ -1112,9 +1136,6 @@ void __init paging_init(void)
 
         pfn_base = phys_base >> PAGE_SHIFT;
 
-        kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
-        kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
-
         set_bit(0, mmu_context_bmap);
 
         shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE);