ia64/pv_ops: add hooks to paravirtualize fsyscall implementation.

Add two hooks, paravirt_get_fsyscall_table() and
paravirt_get_fsys_bubble_doen() to paravirtualize fsyscall implementation.
This patch just add the hooks fsyscall and don't paravirtualize it.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 23 insertions, 3 deletions

diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index b83b2c516008..02dd977436fc 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -7,6 +7,7 @@
 #include <linux/init.h>
 #include <linux/string.h>
 
+#include <asm/paravirt.h>
 #include <asm/patch.h>
 #include <asm/processor.h>
 #include <asm/sections.h>
@@ -169,16 +170,35 @@ ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
         ia64_srlz_i();
 }
 
+extern unsigned long ia64_native_fsyscall_table[NR_syscalls];
+extern char ia64_native_fsys_bubble_down[];
+struct pv_fsys_data pv_fsys_data __initdata = {
+        .fsyscall_table = (unsigned long *)ia64_native_fsyscall_table,
+        .fsys_bubble_down = (void *)ia64_native_fsys_bubble_down,
+};
+
+unsigned long * __init
+paravirt_get_fsyscall_table(void)
+{
+        return pv_fsys_data.fsyscall_table;
+}
+
+char * __init
+paravirt_get_fsys_bubble_down(void)
+{
+        return pv_fsys_data.fsys_bubble_down;
+}
+
 static void __init
 patch_fsyscall_table (unsigned long start, unsigned long end)
 {
-        extern unsigned long fsyscall_table[NR_syscalls];
+        u64 fsyscall_table = (u64)paravirt_get_fsyscall_table();
         s32 *offp = (s32 *) start;
         u64 ip;
 
         while (offp < (s32 *) end) {
                 ip = (u64) ia64_imva((char *) offp + *offp);
-                ia64_patch_imm64(ip, (u64) fsyscall_table);
+                ia64_patch_imm64(ip, fsyscall_table);
                 ia64_fc((void *) ip);
                 ++offp;
         }
@@ -189,7 +209,7 @@ patch_fsyscall_table (unsigned long start, unsigned long end)
 static void __init
 patch_brl_fsys_bubble_down (unsigned long start, unsigned long end)
 {
-        extern char fsys_bubble_down[];
+        u64 fsys_bubble_down = (u64)paravirt_get_fsys_bubble_down();
         s32 *offp = (s32 *) start;
         u64 ip;