powerpc/pseries: Make CPU hotplug path endian safe

- ibm,rtas-configure-connector should treat the RTAS data as big endian.
- Treat ibm,ppc-interrupt-server#s as big-endian when setting
  smp_processor_id during hotplug.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Acked-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

3 files changed, 15 insertions, 14 deletions

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index fdf01b660d59..6ad83bd11fe2 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -25,11 +25,11 @@
 #include <asm/rtas.h>
 
 struct cc_workarea {
-        u32     drc_index;
-        u32     zero;
-        u32     name_offset;
-        u32     prop_length;
-        u32     prop_offset;
+        __be32  drc_index;
+        __be32  zero;
+        __be32  name_offset;
+        __be32  prop_length;
+        __be32  prop_offset;
 };
 
 void dlpar_free_cc_property(struct property *prop)
@@ -49,11 +49,11 @@ static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa)
         if (!prop)
                 return NULL;
 
-        name = (char *)ccwa + ccwa->name_offset;
+        name = (char *)ccwa + be32_to_cpu(ccwa->name_offset);
         prop->name = kstrdup(name, GFP_KERNEL);
 
-        prop->length = ccwa->prop_length;
-        value = (char *)ccwa + ccwa->prop_offset;
+        prop->length = be32_to_cpu(ccwa->prop_length);
+        value = (char *)ccwa + be32_to_cpu(ccwa->prop_offset);
         prop->value = kmemdup(value, prop->length, GFP_KERNEL);
         if (!prop->value) {
                 dlpar_free_cc_property(prop);
@@ -79,7 +79,7 @@ static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa,
         if (!dn)
                 return NULL;
 
-        name = (char *)ccwa + ccwa->name_offset;
+        name = (char *)ccwa + be32_to_cpu(ccwa->name_offset);
         dn->full_name = kasprintf(GFP_KERNEL, "%s/%s", path, name);
         if (!dn->full_name) {
                 kfree(dn);
@@ -126,7 +126,7 @@ void dlpar_free_cc_nodes(struct device_node *dn)
 #define CALL_AGAIN      -2
 #define ERR_CFG_USE     -9003
 
-struct device_node *dlpar_configure_connector(u32 drc_index,
+struct device_node *dlpar_configure_connector(__be32 drc_index,
                                               struct device_node *parent)
 {
         struct device_node *dn;
@@ -414,7 +414,7 @@ static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
         if (!parent)
                 return -ENODEV;
 
-        dn = dlpar_configure_connector(drc_index, parent);
+        dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent);
         if (!dn)
                 return -EINVAL;
 
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index b174fa751d26..5c375f93c669 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -247,7 +247,7 @@ static int pseries_add_processor(struct device_node *np)
         unsigned int cpu;
         cpumask_var_t candidate_mask, tmp;
         int err = -ENOSPC, len, nthreads, i;
-        const u32 *intserv;
+        const __be32 *intserv;
 
         intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", &len);
         if (!intserv)
@@ -293,7 +293,7 @@ static int pseries_add_processor(struct device_node *np)
         for_each_cpu(cpu, tmp) {
                 BUG_ON(cpu_present(cpu));
                 set_cpu_present(cpu, true);
-                set_hard_smp_processor_id(cpu, *intserv++);
+                set_hard_smp_processor_id(cpu, be32_to_cpu(*intserv++));
         }
         err = 0;
 out_unlock:
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 361add62abf1..1796c5438cc6 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -56,7 +56,8 @@ extern void hvc_vio_init_early(void);
 /* Dynamic logical Partitioning/Mobility */
 extern void dlpar_free_cc_nodes(struct device_node *);
 extern void dlpar_free_cc_property(struct property *);
-extern struct device_node *dlpar_configure_connector(u32, struct device_node *);
+extern struct device_node *dlpar_configure_connector(__be32,
+                                                struct device_node *);
 extern int dlpar_attach_node(struct device_node *);
 extern int dlpar_detach_node(struct device_node *);