diff options
| -rw-r--r-- | hw/phb4.c | 13 |
1 files changed, 11 insertions, 2 deletions
@@ -5554,6 +5554,7 @@ static void phb4_probe_stack(struct dt_node *stk_node, uint32_t pec_index, char *path; uint64_t capp_ucode_base; unsigned int max_link_speed; + int rc; gcid = dt_get_chip_id(stk_node); stk_index = dt_prop_get_u32(stk_node, "reg"); @@ -5575,9 +5576,17 @@ static void phb4_probe_stack(struct dt_node *stk_node, uint32_t pec_index, /* Initialize PHB register BAR */ phys_map_get(gcid, PHB4_REG_SPC, phb_num, &phb_bar, NULL); - xscom_write(gcid, nest_stack + XPEC_NEST_STK_PHB_REG_BAR, phb_bar << 8); - bar_en |= XPEC_NEST_STK_BAR_EN_PHB; + rc = xscom_write(gcid, nest_stack + XPEC_NEST_STK_PHB_REG_BAR, + phb_bar << 8); + + /* A scom error here probably indicates a defective/garded PHB */ + if (rc != OPAL_SUCCESS) { + prerror("PHB[%d:%d] Unable to set PHB BAR. Error=%d\n", + gcid, phb_num, rc); + return; + } + bar_en |= XPEC_NEST_STK_BAR_EN_PHB; /* Same with INT BAR (ESB) */ phys_map_get(gcid, PHB4_XIVE_ESB, phb_num, &irq_bar, NULL); |