EDAC/amd64: Add support for family 0x19, models 0x90-9f devices

AMD Models 90h-9fh are APUs. They have built-in HBM3 memory. ECC support
is enabled by default.

APU models have a single Data Fabric (DF) per Package. Each DF is
visible to the OS in the same way as chiplet-based systems like Zen2
CPUs and later. However, the Unified Memory Controllers (UMCs) are
arranged in the same way as GPU-based MI200 devices rather than
CPU-based systems.

Use the existing gpu_ops for hetergeneous systems to support enumeration
of nodes and memory topology with few fixups.

  [ bp: Massage comments. ]

Signed-off-by: Muralidhara M K <muralidhara.mk@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231102114225.2006878-5-muralimk@amd.com

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 5a4e4a59682b..1665f7932bac 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -362,6 +362,7 @@ struct amd64_pvt {
 	u32 dct_sel_lo;		/* DRAM Controller Select Low */
 	u32 dct_sel_hi;		/* DRAM Controller Select High */
 	u32 online_spare;	/* On-Line spare Reg */
+	u32 gpu_umc_base;	/* Base address used for channel selection on GPUs */
 
 	/* x4, x8, or x16 syndromes in use */
 	u8 ecc_sym_sz;