[IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic.

add hooks to paravirtualize iosapic which is a real hardware resource.
On virtualized environment it may be replaced something virtualized
friendly.
Define pv_iosapic_ops and add the hooks.

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

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/ia64/kernel/paravirt.c b/arch/ia64/kernel/paravirt.c
index 5daf659ff291..65c211b2f985 100644
--- a/arch/ia64/kernel/paravirt.c
+++ b/arch/ia64/kernel/paravirt.c
@@ -312,3 +312,28 @@ paravirt_cpu_asm_init(const struct pv_cpu_asm_switch *cpu_asm_switch)
                 cpu_asm_switch->work_processed_syscall;
         paravirt_leave_kernel_targ = cpu_asm_switch->leave_kernel;
 }
+
+/***************************************************************************
+ * pv_iosapic_ops
+ * iosapic read/write hooks.
+ */
+
+static unsigned int
+ia64_native_iosapic_read(char __iomem *iosapic, unsigned int reg)
+{
+        return __ia64_native_iosapic_read(iosapic, reg);
+}
+
+static void
+ia64_native_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
+{
+        __ia64_native_iosapic_write(iosapic, reg, val);
+}
+
+struct pv_iosapic_ops pv_iosapic_ops = {
+        .pcat_compat_init = ia64_native_iosapic_pcat_compat_init,
+        .get_irq_chip = ia64_native_iosapic_get_irq_chip,
+
+        .__read = ia64_native_iosapic_read,
+        .__write = ia64_native_iosapic_write,
+};