[IA64] pvops: paravirtualize entry.S
paravirtualize ia64_swtich_to, ia64_leave_syscall and ia64_leave_kernel.
They include sensitive or performance critical privileged instructions
so that they need paravirtualization.
To paravirtualize them by single source and multi compile
they are converted into indirect jump. And define each pv instances.
Cc: Keith Owens <kaos@ocs.com.au>
Cc: "Dong, Eddie" <eddie.dong@intel.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/include/asm-ia64/paravirt_privop.h b/include/asm-ia64/paravirt_privop.h
index 7b133ae..52482e6 100644
--- a/include/asm-ia64/paravirt_privop.h
+++ b/include/asm-ia64/paravirt_privop.h
@@ -80,12 +80,35 @@
ia64_native_rsm(mask); \
} while (0)
+/******************************************************************************
+ * replacement of hand written assembly codes.
+ */
+struct pv_cpu_asm_switch {
+ unsigned long switch_to;
+ unsigned long leave_syscall;
+ unsigned long work_processed_syscall;
+ unsigned long leave_kernel;
+};
+void paravirt_cpu_asm_init(const struct pv_cpu_asm_switch *cpu_asm_switch);
+
#endif /* __ASSEMBLY__ */
+#define IA64_PARAVIRT_ASM_FUNC(name) paravirt_ ## name
+
#else
/* fallback for native case */
+#define IA64_PARAVIRT_ASM_FUNC(name) ia64_native_ ## name
#endif /* CONFIG_PARAVIRT */
+/* these routines utilize privilege-sensitive or performance-sensitive
+ * privileged instructions so the code must be replaced with
+ * paravirtualized versions */
+#define ia64_switch_to IA64_PARAVIRT_ASM_FUNC(switch_to)
+#define ia64_leave_syscall IA64_PARAVIRT_ASM_FUNC(leave_syscall)
+#define ia64_work_processed_syscall \
+ IA64_PARAVIRT_ASM_FUNC(work_processed_syscall)
+#define ia64_leave_kernel IA64_PARAVIRT_ASM_FUNC(leave_kernel)
+
#endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */