[Xen-ia64-devel] [PATCH 19/27] ia64/pv_ops/xen: paravirtualize entry.S for ia64/xen.

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

paravirtualize entry.S for ia64/xen by multi compile.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 arch/ia64/xen/Makefile      |    2 +-
 arch/ia64/xen/xen_pv_ops.c  |   18 ++++++++++++++++++
 include/asm-ia64/xen/inst.h |    8 ++++++++
 3 files changed, 27 insertions(+), 1 deletions(-)

diff --git a/arch/ia64/xen/Makefile b/arch/ia64/xen/Makefile
index 5c87e4a..9b77e8a 100644
--- a/arch/ia64/xen/Makefile
+++ b/arch/ia64/xen/Makefile
@@ -8,7 +8,7 @@ obj-y := hypercall.o xenivt.o xensetup.o xen_pv_ops.o \
 AFLAGS_xenivt.o += -D__IA64_ASM_PARAVIRTUALIZED_XEN
 
 # xen multi compile
-ASM_PARAVIRT_MULTI_COMPILE_SRCS = ivt.S
+ASM_PARAVIRT_MULTI_COMPILE_SRCS = ivt.S entry.S
 ASM_PARAVIRT_OBJS = $(addprefix xen-,$(ASM_PARAVIRT_MULTI_COMPILE_SRCS:.S=.o))
 obj-y += $(ASM_PARAVIRT_OBJS)
 define paravirtualized_xen
diff --git a/arch/ia64/xen/xen_pv_ops.c b/arch/ia64/xen/xen_pv_ops.c
index b84286b..1ba4617 100644
--- a/arch/ia64/xen/xen_pv_ops.c
+++ b/arch/ia64/xen/xen_pv_ops.c
@@ -275,6 +275,22 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
                        = xen_intrin_local_irq_restore,
 };
 
+/******************************************************************************
+ * replacement of hand written assembly codes.
+ */
+
+extern char xen_switch_to;
+extern char xen_leave_syscall;
+extern char xen_work_processed_syscall;
+extern char xen_leave_kernel;
+
+const struct pv_cpu_asm_switch xen_cpu_asm_switch = {
+       .switch_to              = (unsigned long)&xen_switch_to,
+       .leave_syscall          = (unsigned long)&xen_leave_syscall,
+       .work_processed_syscall = (unsigned long)&xen_work_processed_syscall,
+       .leave_kernel           = (unsigned long)&xen_leave_kernel,
+};
+
 /***************************************************************************
  * pv_ops initialization
  */
@@ -286,4 +302,6 @@ xen_setup_pv_ops(void)
        pv_info = xen_info;
        pv_init_ops = xen_init_ops;
        pv_cpu_ops = xen_cpu_ops;
+
+       paravirt_cpu_asm_init(&xen_cpu_asm_switch);
 }
diff --git a/include/asm-ia64/xen/inst.h b/include/asm-ia64/xen/inst.h
index ed5ebeb..f4e1085 100644
--- a/include/asm-ia64/xen/inst.h
+++ b/include/asm-ia64/xen/inst.h
@@ -25,6 +25,14 @@
 #define ia64_ivt                               xen_ivt
 #define DO_SAVE_MIN                            XEN_DO_SAVE_MIN
 
+#define __paravirt_switch_to                   xen_switch_to
+#define __paravirt_leave_syscall               xen_leave_syscall
+#define __paravirt_work_processed_syscall      xen_work_processed_syscall
+#define __paravirt_leave_kernel                        xen_leave_kernel
+#define __paravirt_pending_syscall_end         xen_work_pending_syscall_end
+#define __paravirt_work_processed_syscall_target \
+                                               xen_work_processed_syscall
+
 #define MOV_FROM_IFA(reg)      \
        movl reg = XSI_IFA;     \
        ;;                      \
-- 
1.5.3


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