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>

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index fdf01b660d5930cd31c4f246c7d4f4659aad6690..6ad83bd11fe21d0aaa22ad0d9cd6e0d399bb945d 100644 (file)
--- 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 b174fa751d260bcebd20b0af83cf5e13ba28158a..5c375f93c669cac9cdbc5dc028e72e297f7713de 100644 (file)
--- 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 361add62abf1089d4cd65aa28c72264a040de635..1796c5438cc661d22a3e026dae6000891f9773d7 100644 (file)
--- 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 *);