MPIPL: Prepare architected registers data tag
Post MPIPL kernel needs saved CPU register details to create vmcore/opalcore.
This patch prepares CPU register data tag and add it to tags list.
[oliver: rebased]
@@ -51,6 +51,7 @@ static struct mpipl_metadata *mpipl_metadata;
/* Dump metadata area */
static struct opal_mpipl_fadump *opal_mpipl_data;
+static struct opal_mpipl_fadump *opal_mpipl_cpu_data;
/*
* Number of tags passed by OPAL to kernel after MPIPL boot.
@@ -402,6 +403,41 @@ static inline void post_mpipl_get_preserved_tags(void)
opal_mpipl_tags[OPAL_MPIPL_TAG_BOOT_MEM] = mpipl_metadata->boot_mem_size;
}
+static void post_mpipl_arch_regs_data(void)
+{
+ struct proc_dump_area *proc_dump = (void *)(PROC_DUMP_AREA_BASE);
+
+ if (proc_dump->dest_addr == 0) {
+ prlog(PR_DEBUG, "Invalid CPU registers destination address\n");
+ return;
+ }
+
+ if (proc_dump->act_size == 0) {
+ prlog(PR_DEBUG, "Invalid CPU registers destination size\n");
+ return;
+ }
+
+ opal_mpipl_cpu_data = zalloc(sizeof(struct opal_mpipl_fadump) +
+ sizeof(struct opal_mpipl_region));
+ if (!opal_mpipl_cpu_data) {
+ prlog(PR_ERR, "Failed to allocate memory\n");
+ return;
+ }
+
+ /* Fill CPU register details */
+ opal_mpipl_cpu_data->version = OPAL_MPIPL_VERSION;
+ opal_mpipl_cpu_data->cpu_data_version = proc_dump->version;
+ opal_mpipl_cpu_data->cpu_data_size = proc_dump->thread_size;
+ opal_mpipl_cpu_data->region_cnt = cpu_to_be32(1);
+
+ opal_mpipl_cpu_data->region[0].src = proc_dump->dest_addr & ~(HRMOR_BIT);
+ opal_mpipl_cpu_data->region[0].dest = proc_dump->dest_addr & ~(HRMOR_BIT);
+ opal_mpipl_cpu_data->region[0].size = proc_dump->act_size;
+
+ /* Update tag */
+ opal_mpipl_tags[OPAL_MPIPL_TAG_CPU] = (u64)opal_mpipl_cpu_data;
+}
+
static void post_mpipl_get_opal_data(void)
{
struct mdrt_table *mdrt = (void *)(MDRT_TABLE_BASE);
@@ -485,6 +521,7 @@ void opal_mpipl_init(void)
if (dt_find_property(dump_node, "mpipl-boot")) {
post_mpipl_get_preserved_tags();
post_mpipl_get_opal_data();
+ post_mpipl_arch_regs_data();
}
/* Clear OPAL metadata area */
