powerpc/pseries: Add extended_cede_processor() helper function.

[safe/jmp/linux-2.6] / arch / powerpc / platforms / pseries / plpar_wrappers.h

diff --git a/arch/powerpc/platforms/pseries/plpar_wrappers.h b/arch/powerpc/platforms/pseries/plpar_wrappers.h
index a437267..0603c91 100644 (file)
--- a/arch/powerpc/platforms/pseries/plpar_wrappers.h
+++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h
@@ -2,17 +2,40 @@
 #define _PSERIES_PLPAR_WRAPPERS_H
 
 #include <asm/hvcall.h>
+#include <asm/page.h>
 
 static inline long poll_pending(void)
 {
        return plpar_hcall_norets(H_POLL_PENDING);
 }
 
+static inline u8 get_cede_latency_hint(void)
+{
+       return get_lppaca()->gpr5_dword.fields.cede_latency_hint;
+}
+
+static inline void set_cede_latency_hint(u8 latency_hint)
+{
+       get_lppaca()->gpr5_dword.fields.cede_latency_hint = latency_hint;
+}
+
 static inline long cede_processor(void)
 {
        return plpar_hcall_norets(H_CEDE);
 }
 
+static inline long extended_cede_processor(unsigned long latency_hint)
+{
+       long rc;
+       u8 old_latency_hint = get_cede_latency_hint();
+
+       set_cede_latency_hint(latency_hint);
+       rc = cede_processor();
+       set_cede_latency_hint(old_latency_hint);
+
+       return rc;
+}
+
 static inline long vpa_call(unsigned long flags, unsigned long cpu,
                unsigned long vpa)
 {
@@ -42,14 +65,46 @@ static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
        return vpa_call(0x3, cpu, vpa);
 }
 
+static inline long unregister_dtl(unsigned long cpu, unsigned long vpa)
+{
+       return vpa_call(0x6, cpu, vpa);
+}
+
+static inline long register_dtl(unsigned long cpu, unsigned long vpa)
+{
+       return vpa_call(0x2, cpu, vpa);
+}
+
 static inline long plpar_page_set_loaned(unsigned long vpa)
 {
-       return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa, 0);
+       unsigned long cmo_page_sz = cmo_get_page_size();
+       long rc = 0;
+       int i;
+
+       for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
+               rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
+
+       for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
+               plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
+                                  vpa + i - cmo_page_sz, 0);
+
+       return rc;
 }
 
 static inline long plpar_page_set_active(unsigned long vpa)
 {
-       return plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa, 0);
+       unsigned long cmo_page_sz = cmo_get_page_size();
+       long rc = 0;
+       int i;
+
+       for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
+               rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
+
+       for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
+               plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
+                                  vpa + i - cmo_page_sz, 0);
+
+       return rc;
 }
 
 extern void vpa_init(int cpu);