[POWERPC] Implement SLB shadow buffer

[linux-2.6-omap-h63xx.git] / arch / powerpc / platforms / pseries / lpar.c

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 6cbf14266d5e2b9a36d993833b21001026c9104a..1820a0b0a8c6e55cd3f7351e34ea68a2f0110ab5 100644 (file)
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -252,18 +252,34 @@ out:
 void vpa_init(int cpu)
 {
        int hwcpu = get_hard_smp_processor_id(cpu);
-       unsigned long vpa = __pa(&lppaca[cpu]);
+       unsigned long addr;
        long ret;
 
        if (cpu_has_feature(CPU_FTR_ALTIVEC))
                lppaca[cpu].vmxregs_in_use = 1;
 
-       ret = register_vpa(hwcpu, vpa);
+       addr = __pa(&lppaca[cpu]);
+       ret = register_vpa(hwcpu, addr);
 
-       if (ret)
+       if (ret) {
                printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
                                "cpu %d (hw %d) of area %lx returns %ld\n",
-                               cpu, hwcpu, vpa, ret);
+                               cpu, hwcpu, addr, ret);
+               return;
+       }
+       /*
+        * PAPR says this feature is SLB-Buffer but firmware never
+        * reports that.  All SPLPAR support SLB shadow buffer.
+        */
+       addr = __pa(&slb_shadow[cpu]);
+       if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
+               ret = register_slb_shadow(hwcpu, addr);
+               if (ret)
+                       printk(KERN_ERR
+                              "WARNING: vpa_init: SLB shadow buffer "
+                              "registration for cpu %d (hw %d) of area %lx "
+                              "returns %ld\n", cpu, hwcpu, addr, ret);
+       }
 }
 
 long pSeries_lpar_hpte_insert(unsigned long hpte_group,