diff options
| -rw-r--r-- | arch/powerpc/include/asm/opal.h | 11 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 23 |
3 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index b2f8ce1fd0d7..86055e598269 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -149,6 +149,8 @@ struct opal_sg_list { #define OPAL_DUMP_INFO2 94 #define OPAL_PCI_EEH_FREEZE_SET 97 #define OPAL_HANDLE_HMI 98 +#define OPAL_REGISTER_DUMP_REGION 101 +#define OPAL_UNREGISTER_DUMP_REGION 102 #ifndef __ASSEMBLY__ @@ -920,6 +922,8 @@ int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer, uint64_t length); int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data); int64_t opal_handle_hmi(void); +int64_t opal_register_dump_region(uint32_t id, uint64_t start, uint64_t end); +int64_t opal_unregister_dump_region(uint32_t id); /* Internal functions */ extern int early_init_dt_scan_opal(unsigned long node, const char *uname, @@ -974,6 +978,13 @@ struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr, unsigned long vmalloc_size); void opal_free_sg_list(struct opal_sg_list *sg); +/* + * Dump region ID range usable by the OS + */ +#define OPAL_DUMP_REGION_HOST_START 0x80 +#define OPAL_DUMP_REGION_LOG_BUF 0x80 +#define OPAL_DUMP_REGION_HOST_END 0xFF + #endif /* __ASSEMBLY__ */ #endif /* __OPAL_H */ diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index a328be44880f..2e6ce1b8dc8f 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -245,3 +245,5 @@ OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ); OPAL_CALL(opal_get_param, OPAL_GET_PARAM); OPAL_CALL(opal_set_param, OPAL_SET_PARAM); OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI); +OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION); +OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index f0a01a46a57d..b44eec3e8dbd 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -605,6 +605,24 @@ static int opal_sysfs_init(void) return 0; } +static void __init opal_dump_region_init(void) +{ + void *addr; + uint64_t size; + int rc; + + /* Register kernel log buffer */ + addr = log_buf_addr_get(); + size = log_buf_len_get(); + rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF, + __pa(addr), size); + /* Don't warn if this is just an older OPAL that doesn't + * know about that call + */ + if (rc && rc != OPAL_UNSUPPORTED) + pr_warn("DUMP: Failed to register kernel log buffer. " + "rc = %d\n", rc); +} static int __init opal_init(void) { struct device_node *np, *consoles; @@ -654,6 +672,8 @@ static int __init opal_init(void) /* Create "opal" kobject under /sys/firmware */ rc = opal_sysfs_init(); if (rc == 0) { + /* Setup dump region interface */ + opal_dump_region_init(); /* Setup error log interface */ rc = opal_elog_init(); /* Setup code update interface */ @@ -694,6 +714,9 @@ void opal_shutdown(void) else mdelay(10); } + + /* Unregister memory dump region */ + opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF); } /* Export this so that test modules can use it */ |