linux-kernel - [PATCH v7 09/12] EDAC/amd64: Add check for when to add DRAM base and hole

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Date:   Thu, 3 Feb 2022 11:49:39 -0600
From:   Naveen Krishna Chatradhi <nchatrad@....com>
To:     <linux-edac@...r.kernel.org>, <x86@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <bp@...en8.de>, <mingo@...hat.com>,
        <mchehab@...nel.org>, <yazen.ghannam@....com>,
        Naveen Krishna Chatradhi <nchatrad@....com>
Subject: [PATCH v7 09/12] EDAC/amd64: Add check for when to add DRAM base and hole

From: Yazen Ghannam <yazen.ghannam@....com>

Some DF versions and interleaving modes require the DRAM base address
and hole adjustments to be done before accounting for hashing. Others
require this to be done after.

Add a check for this behavior. Save a boolean in the ctx struct which
can be appropriately set based on DF version or interleaving mode.

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
Signed-off-by: Naveen Krishna Chatradhi <nchatrad@....com>
---
Link:
https://lkml.kernel.org/r/20211028175728.121452-32-yazen.ghannam@amd.com

v4->v7:
* Was patch 31 in v3.

v2->v3:
* New in v3.


 drivers/edac/amd64_edac.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 241419a0be93..0f35c8519555 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1112,6 +1112,7 @@ struct addr_ctx {
 	u8 intlv_num_sockets;
 	u8 cs_id;
 	u8 node_id_shift;
+	bool late_hole_remove;
 	int (*dehash_addr)(struct addr_ctx *ctx);
 	void (*make_space_for_cs_id)(struct addr_ctx *ctx);
 	void (*insert_cs_id)(struct addr_ctx *ctx);
@@ -1676,7 +1677,7 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr
 		return -EINVAL;
 	}
 
-	if (add_base_and_hole(&ctx)) {
+	if (!ctx.late_hole_remove && add_base_and_hole(&ctx)) {
 		pr_debug("Failed to add DRAM base address and hole");
 		return -EINVAL;
 	}
@@ -1686,6 +1687,11 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr
 		return -EINVAL;
 	}
 
+	if (ctx.late_hole_remove && add_base_and_hole(&ctx)) {
+		pr_debug("Failed to add DRAM base address and hole");
+		return -EINVAL;
+	}
+
 	if (addr_over_limit(&ctx)) {
 		pr_debug("Calculated address is over limit");
 		return -EINVAL;
-- 
2.25.1