ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops.

add helper functions to support binary patching for paravirt_ops.

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

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/ia64/kernel/paravirtentry.S b/arch/ia64/kernel/paravirtentry.S
index 2f42fcb9776a..80c0d365cbc0 100644
--- a/arch/ia64/kernel/paravirtentry.S
+++ b/arch/ia64/kernel/paravirtentry.S
@@ -58,3 +58,59 @@ BRANCH_PROC(switch_to, r22, b7)
 BRANCH_PROC_UNWINFO(leave_syscall, r22, b7)
 BRANCH_PROC(work_processed_syscall, r2, b7)
 BRANCH_PROC_UNWINFO(leave_kernel, r22, b7)
+
+
+#ifdef CONFIG_MODULES
+#define __INIT_OR_MODULE        .text
+#define __INITDATA_OR_MODULE    .data
+#else
+#define __INIT_OR_MODULE        __INIT
+#define __INITDATA_OR_MODULE    __INITDATA
+#endif /* CONFIG_MODULES */
+
+        __INIT_OR_MODULE
+        GLOBAL_ENTRY(paravirt_fc_i)
+        fc.i r32
+        br.ret.sptk.many rp
+        END(paravirt_fc_i)
+        __FINIT
+
+        __INIT_OR_MODULE
+        .align 32
+        GLOBAL_ENTRY(paravirt_nop_b_inst_bundle)
+        {
+                nop.b 0
+                nop.b 0
+                nop.b 0
+        }
+        END(paravirt_nop_b_inst_bundle)
+        __FINIT
+
+        /* NOTE: nop.[mfi] has same format */
+        __INIT_OR_MODULE
+        GLOBAL_ENTRY(paravirt_nop_mfi_inst_bundle)
+        {
+                nop.m 0
+                nop.f 0
+                nop.i 0
+        }
+        END(paravirt_nop_mfi_inst_bundle)
+        __FINIT
+
+        __INIT_OR_MODULE
+        GLOBAL_ENTRY(paravirt_nop_bundle)
+paravirt_nop_bundle_start:
+        {
+                nop 0
+                nop 0
+                nop 0
+        }
+paravirt_nop_bundle_end:
+        END(paravirt_nop_bundle)
+        __FINIT
+
+        __INITDATA_OR_MODULE
+        .align 8
+        .global paravirt_nop_bundle_size
+paravirt_nop_bundle_size:
+        data8   paravirt_nop_bundle_end - paravirt_nop_bundle_start