powerpc/pseries: Update firmware_has_feature() to check architecture vector 5 bits

The firmware_has_feature() function makes it easy to check for supported
features of the hypervisor. This patch extends the capability of
firmware_has_feature() to include checking for specified bits
in vector 5 of the architecture vector as reported in the device tree.

As part of this the #defines used for the architecture vector are re-defined
such that each option has the index into vector 5 and the feature bit encoded
into it. This makes checking for architecture bits when initiating data
for firmware_has_feature much easier.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 39 insertions, 10 deletions

diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 1236a9d6146a..06639fa2d61d 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -28,18 +28,18 @@
 
 #include "pseries.h"
 
-typedef struct {
+struct hypertas_fw_feature {
     unsigned long val;
     char * name;
-} firmware_feature_t;
+};
 
 /*
  * The names in this table match names in rtas/ibm,hypertas-functions.  If the
  * entry ends in a '*', only upto the '*' is matched.  Otherwise the entire
  * string must match.
  */
-static __initdata firmware_feature_t
-firmware_features_table[] = {
+static __initdata struct hypertas_fw_feature
+hypertas_fw_features_table[] = {
         {FW_FEATURE_PFT,                "hcall-pft"},
         {FW_FEATURE_TCE,                "hcall-tce"},
         {FW_FEATURE_SPRG0,              "hcall-sprg0"},
@@ -69,16 +69,16 @@ firmware_features_table[] = {
  * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
  * be moved into prom.c prom_init().
  */
-void __init fw_feature_init(const char *hypertas, unsigned long len)
+void __init fw_hypertas_feature_init(const char *hypertas, unsigned long len)
 {
         const char *s;
         int i;
 
-        pr_debug(" -> fw_feature_init()\n");
+        pr_debug(" -> fw_hypertas_feature_init()\n");
 
         for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
-                for (i = 0; i < ARRAY_SIZE(firmware_features_table); i++) {
-                        const char *name = firmware_features_table[i].name;
+                for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) {
+                        const char *name = hypertas_fw_features_table[i].name;
                         size_t size;
 
                         /*
@@ -94,10 +94,39 @@ void __init fw_feature_init(const char *hypertas, unsigned long len)
 
                         /* we have a match */
                         powerpc_firmware_features |=
-                                firmware_features_table[i].val;
+                                hypertas_fw_features_table[i].val;
                         break;
                 }
         }
 
-        pr_debug(" <- fw_feature_init()\n");
+        pr_debug(" <- fw_hypertas_feature_init()\n");
+}
+
+struct vec5_fw_feature {
+        unsigned long   val;
+        unsigned int    feature;
+};
+
+static __initdata struct vec5_fw_feature
+vec5_fw_features_table[] = {
+        {FW_FEATURE_TYPE1_AFFINITY,     OV5_TYPE1_AFFINITY},
+};
+
+void __init fw_vec5_feature_init(const char *vec5, unsigned long len)
+{
+        unsigned int index, feat;
+        int i;
+
+        pr_debug(" -> fw_vec5_feature_init()\n");
+
+        for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) {
+                index = OV5_INDX(vec5_fw_features_table[i].feature);
+                feat = OV5_FEAT(vec5_fw_features_table[i].feature);
+
+                if (vec5[index] & feat)
+                        powerpc_firmware_features |=
+                                vec5_fw_features_table[i].val;
+        }
+
+        pr_debug(" <- fw_vec5_feature_init()\n");
 }