diff options
Diffstat (limited to 'drivers/ras/amd/atl/system.c')
| -rw-r--r-- | drivers/ras/amd/atl/system.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/ras/amd/atl/system.c b/drivers/ras/amd/atl/system.c index e18d916d5e8b..812a30e21d3a 100644 --- a/drivers/ras/amd/atl/system.c +++ b/drivers/ras/amd/atl/system.c @@ -12,6 +12,12 @@ #include "internal.h" +#include <linux/prmt.h> + +const guid_t norm_to_sys_guid = GUID_INIT(0xE7180659, 0xA65D, 0x451D, + 0x92, 0xCD, 0x2B, 0x56, 0xF1, + 0x2B, 0xEB, 0xA6); + int determine_node_id(struct addr_ctx *ctx, u8 socket_id, u8 die_id) { u16 socket_id_bits, die_id_bits; @@ -212,15 +218,17 @@ static int determine_df_rev(void) if (!rev) return determine_df_rev_legacy(); - /* - * Fail out for major revisions other than '4'. - * - * Explicit support should be added for newer systems to avoid issues. - */ if (rev == 4) return df4_determine_df_rev(reg); - return -EINVAL; + /* All other systems should have PRM handlers. */ + if (!acpi_prm_handler_available(&norm_to_sys_guid)) { + pr_debug("PRM not available\n"); + return -ENODEV; + } + + df_cfg.flags.prm_only = true; + return 0; } static int get_dram_hole_base(void) @@ -288,12 +296,18 @@ static void dump_df_cfg(void) int get_df_system_info(void) { - if (determine_df_rev()) { + int ret; + + ret = determine_df_rev(); + if (ret) { pr_warn("Failed to determine DF Revision"); df_cfg.rev = UNKNOWN; - return -EINVAL; + return ret; } + if (df_cfg.flags.prm_only) + return 0; + apply_node_id_shift(); get_num_maps(); |