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Subject[PATCH v4 22/24] EDAC/amd64: Match hash function to reference code
Date
The reference code for DF2 hashing was changed to XOR the interleave
address bit rather than the CS ID. Match that here.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lore.kernel.org/r/20211028175728.121452-28-yazen.ghannam@amd.com

v3->v4:
* No change.

v2->v3:
* Was patch 28 in v2.

v1->v2:
* Moved from arch/x86 to EDAC.

drivers/edac/amd64_edac.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index e293aefd486e..601ececf5106 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1142,7 +1142,7 @@ static int dehash_addr_df2(struct addr_ctx *ctx)
(ctx->ret_addr >> 18) ^
(ctx->ret_addr >> 21) ^
(ctx->ret_addr >> 30) ^
- ctx->cs_id;
+ (ctx->ret_addr >> ctx->intlv_addr_bit);

hashed_bit &= BIT(0);

--
2.25.1
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