diff options
| -rw-r--r-- | core/opal-dump.c | 42 | ||||
| -rw-r--r-- | include/opal-api.h | 3 |
2 files changed, 43 insertions, 2 deletions
diff --git a/core/opal-dump.c b/core/opal-dump.c index 15f8214..2ff3a2f 100644 --- a/core/opal-dump.c +++ b/core/opal-dump.c @@ -44,6 +44,18 @@ static struct mpipl_metadata *mpipl_metadata; /* Dump metadata area */ static struct opal_mpipl_fadump *opal_mpipl_data; +/* + * Number of tags passed by OPAL to kernel after MPIPL boot. + * Currently it supports below tags: + * - CPU register data area + * - OPAL metadata area address + * - Kernel passed tag during MPIPL registration + * - Post MPIPL boot memory size + */ +#define MAX_OPAL_MPIPL_TAGS 0x04 +static u64 opal_mpipl_tags[MAX_OPAL_MPIPL_TAGS]; +static int opal_mpipl_max_tags = MAX_OPAL_MPIPL_TAGS; + static int opal_mpipl_add_entry(u8 region, u64 src, u64 dest, u64 size) { @@ -333,6 +345,29 @@ static int64_t opal_mpipl_register_tag(enum opal_mpipl_tags tag, return rc; } +static uint64_t opal_mpipl_query_tag(enum opal_mpipl_tags tag, + uint64_t *tag_val) +{ + if (!opal_addr_valid(tag_val)) { + prlog(PR_DEBUG, "Invalid tag address\n"); + return OPAL_PARAMETER; + } + + if (tag >= opal_mpipl_max_tags) + return OPAL_PARAMETER; + + *tag_val = opal_mpipl_tags[tag]; + return OPAL_SUCCESS; +} + +static inline void post_mpipl_get_preserved_tags(void) +{ + if (mpipl_metadata->kernel_tag) + opal_mpipl_tags[OPAL_MPIPL_TAG_KERNEL] = mpipl_metadata->kernel_tag; + if (mpipl_metadata->boot_mem_size) + opal_mpipl_tags[OPAL_MPIPL_TAG_BOOT_MEM] = mpipl_metadata->boot_mem_size; +} + static void post_mpipl_get_opal_data(void) { struct mdrt_table *mdrt = (void *)(MDRT_TABLE_BASE); @@ -385,6 +420,8 @@ static void post_mpipl_get_opal_data(void) if (j == count) break; } + + opal_mpipl_tags[OPAL_MPIPL_TAG_OPAL] = (u64)opal_mpipl_data; } void opal_mpipl_save_crashing_pir(void) @@ -411,8 +448,10 @@ void opal_mpipl_init(void) /* Get metadata area pointer */ mpipl_metadata = (void *)(DUMP_METADATA_AREA_BASE); - if (dt_find_property(dump_node, "mpipl-boot")) + if (dt_find_property(dump_node, "mpipl-boot")) { + post_mpipl_get_preserved_tags(); post_mpipl_get_opal_data(); + } /* Clear OPAL metadata area */ if (sizeof(struct mpipl_metadata) > DUMP_METADATA_AREA_SIZE) { @@ -436,4 +475,5 @@ void opal_mpipl_init(void) /* OPAL API for MPIPL update */ opal_register(OPAL_MPIPL_UPDATE, opal_mpipl_update, 4); opal_register(OPAL_MPIPL_REGISTER_TAG, opal_mpipl_register_tag, 2); + opal_register(OPAL_MPIPL_QUERY_TAG, opal_mpipl_query_tag, 2); } diff --git a/include/opal-api.h b/include/opal-api.h index 7d8e046..ee66bbb 100644 --- a/include/opal-api.h +++ b/include/opal-api.h @@ -221,7 +221,8 @@ #define OPAL_NPU_MEM_RELEASE 172 #define OPAL_MPIPL_UPDATE 173 #define OPAL_MPIPL_REGISTER_TAG 174 -#define OPAL_LAST 174 +#define OPAL_MPIPL_QUERY_TAG 175 +#define OPAL_LAST 175 #define QUIESCE_HOLD 1 /* Spin all calls at entry */ #define QUIESCE_REJECT 2 /* Fail all calls with OPAL_BUSY */ |