linux-kernel - [PATCH] cxl: Fix use of phys_to_target

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Message-ID: <Zfl9Efxe7DwuU_i3@rric.localdomain>
Date: Tue, 19 Mar 2024 12:54:57 +0100
From: Robert Richter <rrichter@....com>
To: Dan Williams <dan.j.williams@...el.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Alison Schofield <alison.schofield@...el.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-cxl@...r.kernel.org, Derick Marks <derick.w.marks@...el.com>,
	Len Brown <lenb@...nel.org>
Subject: [PATCH] cxl: Fix use of phys_to_target_node() outside of init section

Hi Dan,

patch below. I have not included it into v2 of the SRAT/CEDT changes
as it is cxl specific and can be applied separately.

Thanks,

-Robert


On 18.03.24 14:26:41, Dan Williams wrote:
> It should also be the case that cxl_acpi needs this:
> 
> diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
> index 67998dbd1d46..1bf25185c35b 100644
> --- a/drivers/cxl/Kconfig
> +++ b/drivers/cxl/Kconfig
> @@ -6,6 +6,7 @@ menuconfig CXL_BUS
>         select FW_UPLOAD
>         select PCI_DOE
>         select FIRMWARE_TABLE
> +       select NUMA_KEEP_MEMINFO if NUMA
>         help
>           CXL is a bus that is electrically compatible with PCI Express, but
>           layers three protocols on that signalling (CXL.io, CXL.cache, and

>From be5b495980bae41d879909212db02dac0fba978e Mon Sep 17 00:00:00 2001
From: Robert Richter <rrichter@....com>
Date: Tue, 19 Mar 2024 09:28:33 +0100
Subject: [PATCH] cxl: Fix use of phys_to_target_node() outside of init section

The CXL driver uses both functions phys_to_target_node() and
memory_add_physaddr_to_nid(). The x86 architecture relies on the
NUMA_KEEP_MEMINFO kernel option to be set. Enable the option for the
driver accordingly.

Suggested-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Robert Richter <rrichter@....com>
---
 drivers/cxl/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
index 67998dbd1d46..6140b3529a29 100644
--- a/drivers/cxl/Kconfig
+++ b/drivers/cxl/Kconfig
@@ -6,6 +6,7 @@ menuconfig CXL_BUS
 	select FW_UPLOAD
 	select PCI_DOE
 	select FIRMWARE_TABLE
+	select NUMA_KEEP_MEMINFO if (NUMA && X86)
 	help
 	  CXL is a bus that is electrically compatible with PCI Express, but
 	  layers three protocols on that signalling (CXL.io, CXL.cache, and
-- 
2.39.2