linux-kernel - [PATCH 5/7] EDAC/skx_common: Extend the maximum number of DRAM chip row bits

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Message-ID: <20251119134132.2389472-6-qiuxu.zhuo@intel.com>
Date: Wed, 19 Nov 2025 21:41:29 +0800
From: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
To: Tony Luck <tony.luck@...el.com>,
	Borislav Petkov <bp@...en8.de>
Cc: Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
	Yi Lai <yi1.lai@...el.com>,
	linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/7] EDAC/skx_common: Extend the maximum number of DRAM chip row bits

The allowed maximum number of row bits for DRAM chips in the Diamond
Rapids server processor is up to 19. Extend the current maximum row
bits from 18 to 19.

Tested-by: Yi Lai <yi1.lai@...el.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
---
 drivers/edac/skx_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index 32a4ef27a987..3276afe43922 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -451,7 +451,7 @@ static int skx_get_dimm_attr(u32 reg, int lobit, int hibit, int add,
 }
 
 #define numrank(reg)	skx_get_dimm_attr(reg, 12, 13, 0, 0, 2, "ranks")
-#define numrow(reg)	skx_get_dimm_attr(reg, 2, 4, 12, 1, 6, "rows")
+#define numrow(reg)	skx_get_dimm_attr(reg, 2, 4, 12, 1, 7, "rows")
 #define numcol(reg)	skx_get_dimm_attr(reg, 0, 1, 10, 0, 2, "cols")
 
 int skx_get_dimm_info(u32 mtr, u32 mcmtr, u32 amap, struct dimm_info *dimm,
-- 
2.43.0