diff options
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index aa316d820736..f10b9ec8c1f5 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -9,8 +9,9 @@ * 2 of the License, or (at your option) any later version. */ -#undef DEBUG +#define pr_fmt(fmt) "opal: " fmt +#include <linux/printk.h> #include <linux/types.h> #include <linux/of.h> #include <linux/of_fdt.h> @@ -625,6 +626,39 @@ static int opal_sysfs_init(void) return 0; } +static ssize_t symbol_map_read(struct file *fp, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + return memory_read_from_buffer(buf, count, &off, bin_attr->private, + bin_attr->size); +} + +static BIN_ATTR_RO(symbol_map, 0); + +static void opal_export_symmap(void) +{ + const __be64 *syms; + unsigned int size; + struct device_node *fw; + int rc; + + fw = of_find_node_by_path("/ibm,opal/firmware"); + if (!fw) + return; + syms = of_get_property(fw, "symbol-map", &size); + if (!syms || size != 2 * sizeof(__be64)) + return; + + /* Setup attributes */ + bin_attr_symbol_map.private = __va(be64_to_cpu(syms[0])); + bin_attr_symbol_map.size = be64_to_cpu(syms[1]); + + rc = sysfs_create_bin_file(opal_kobj, &bin_attr_symbol_map); + if (rc) + pr_warn("Error %d creating OPAL symbols file\n", rc); +} + static void __init opal_dump_region_init(void) { void *addr; @@ -713,6 +747,8 @@ static int __init opal_init(void) /* Create "opal" kobject under /sys/firmware */ rc = opal_sysfs_init(); if (rc == 0) { + /* Export symbol map to userspace */ + opal_export_symmap(); /* Setup dump region interface */ opal_dump_region_init(); /* Setup error log interface */ |
