ia64/pv_ops: gate page paravirtualization.

paravirtualize gate page by allowing each pv_ops instances
to define its own gate page.

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

2 files changed, 73 insertions, 0 deletions

diff --git a/arch/ia64/include/asm/native/patchlist.h b/arch/ia64/include/asm/native/patchlist.h
new file mode 100644
index 000000000000..be16ca9311bf
--- /dev/null
+++ b/arch/ia64/include/asm/native/patchlist.h
@@ -0,0 +1,38 @@
+/******************************************************************************
+ * arch/ia64/include/asm/native/inst.h
+ *
+ * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
+ *                    VA Linux Systems Japan K.K.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#define __paravirt_start_gate_fsyscall_patchlist                \
+        __ia64_native_start_gate_fsyscall_patchlist
+#define __paravirt_end_gate_fsyscall_patchlist                  \
+        __ia64_native_end_gate_fsyscall_patchlist
+#define __paravirt_start_gate_brl_fsys_bubble_down_patchlist    \
+        __ia64_native_start_gate_brl_fsys_bubble_down_patchlist
+#define __paravirt_end_gate_brl_fsys_bubble_down_patchlist      \
+        __ia64_native_end_gate_brl_fsys_bubble_down_patchlist
+#define __paravirt_start_gate_vtop_patchlist                    \
+        __ia64_native_start_gate_vtop_patchlist
+#define __paravirt_end_gate_vtop_patchlist                      \
+        __ia64_native_end_gate_vtop_patchlist
+#define __paravirt_start_gate_mckinley_e9_patchlist             \
+        __ia64_native_start_gate_mckinley_e9_patchlist
+#define __paravirt_end_gate_mckinley_e9_patchlist               \
+        __ia64_native_end_gate_mckinley_e9_patchlist
diff --git a/arch/ia64/include/asm/paravirt.h b/arch/ia64/include/asm/paravirt.h
index a73e77add7e2..fc433f6c3275 100644
--- a/arch/ia64/include/asm/paravirt.h
+++ b/arch/ia64/include/asm/paravirt.h
@@ -35,6 +35,41 @@ extern struct pv_fsys_data pv_fsys_data;
 
 unsigned long *paravirt_get_fsyscall_table(void);
 char *paravirt_get_fsys_bubble_down(void);
+
+/******************************************************************************
+ * patchlist addresses for gate page
+ */
+enum pv_gate_patchlist {
+        PV_GATE_START_FSYSCALL,
+        PV_GATE_END_FSYSCALL,
+
+        PV_GATE_START_BRL_FSYS_BUBBLE_DOWN,
+        PV_GATE_END_BRL_FSYS_BUBBLE_DOWN,
+
+        PV_GATE_START_VTOP,
+        PV_GATE_END_VTOP,
+
+        PV_GATE_START_MCKINLEY_E9,
+        PV_GATE_END_MCKINLEY_E9,
+};
+
+struct pv_patchdata {
+        unsigned long start_fsyscall_patchlist;
+        unsigned long end_fsyscall_patchlist;
+        unsigned long start_brl_fsys_bubble_down_patchlist;
+        unsigned long end_brl_fsys_bubble_down_patchlist;
+        unsigned long start_vtop_patchlist;
+        unsigned long end_vtop_patchlist;
+        unsigned long start_mckinley_e9_patchlist;
+        unsigned long end_mckinley_e9_patchlist;
+
+        void *gate_section;
+};
+
+extern struct pv_patchdata pv_patchdata;
+
+unsigned long paravirt_get_gate_patchlist(enum pv_gate_patchlist type);
+void *paravirt_get_gate_section(void);
 #endif
 
 #ifdef CONFIG_PARAVIRT_GUEST