diff options
| author |   John Allen <john.allen@amd.com> | 2024-06-06 20:33:09 +0000 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-09 23:43:26 +0200 |
| commit | 1233aa3fb342ca4e63d398c6a3de8ed32ce796ea (patch) | |
| tree | a2f930621358630c8c5cf270de77576fafe7aca1 /drivers/ras/amd/atl/system.c | |
| parent | RAS/AMD/ATL: Add amd_atl pr_fmt() prefix (diff) | |
| download | wireguard-linux-1233aa3fb342ca4e63d398c6a3de8ed32ce796ea.tar.xz wireguard-linux-1233aa3fb342ca4e63d398c6a3de8ed32ce796ea.zip | |
RAS/AMD/ATL: Read DRAM hole base early
Read DRAM hole base when constructing the address map as the value will
not change during run time.
Signed-off-by: John Allen <john.allen@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Link: https://lore.kernel.org/r/20240606203313.51197-3-john.allen@amd.com
Diffstat (limited to 'drivers/ras/amd/atl/system.c')
| -rw-r--r-- | drivers/ras/amd/atl/system.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/ras/amd/atl/system.c b/drivers/ras/amd/atl/system.c index 248ea493b841..8423c9f3a8d2 100644 --- a/drivers/ras/amd/atl/system.c +++ b/drivers/ras/amd/atl/system.c @@ -223,6 +223,21 @@ static int determine_df_rev(void) return -EINVAL; } +static int get_dram_hole_base(void) +{ + u8 func = 0; + + if (df_cfg.rev >= DF4) + func = 7; + + if (df_indirect_read_broadcast(0, func, 0x104, &df_cfg.dram_hole_base)) + return -EINVAL; + + df_cfg.dram_hole_base &= DF_DRAM_HOLE_BASE_MASK; + + return 0; +} + static void get_num_maps(void) { switch (df_cfg.rev) { @@ -266,6 +281,7 @@ static void dump_df_cfg(void) pr_debug("num_coh_st_maps=%u", df_cfg.num_coh_st_maps); + pr_debug("dram_hole_base=0x%x", df_cfg.dram_hole_base); pr_debug("flags.legacy_ficaa=%u", df_cfg.flags.legacy_ficaa); pr_debug("flags.socket_id_shift_quirk=%u", df_cfg.flags.socket_id_shift_quirk); } @@ -282,6 +298,9 @@ int get_df_system_info(void) get_num_maps(); + if (get_dram_hole_base()) + pr_warn("Failed to read DRAM hole base"); + dump_df_cfg(); return 0; |