* One-line patch: Make ACPI provide CEDT table
[not found] <9d2182c6-9c63-f3dd-91a6-efdf3671ed61@boldcoder.com>
@ 2022-01-12 5:20 ` Robert Kiraly
2022-01-12 14:46 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Robert Kiraly @ 2022-01-12 5:20 UTC (permalink / raw)
To: linux-pm; +Cc: linux-kernel, Len Brown, Rafael J. Wysocki
[-- Attachment #1: Type: text/plain, Size: 524 bytes --]
The attached patch is a one-line change to linux-pm 5.16-rc8.
The patch simply adds ACPI_SIG_CEDT to table_sigs[] in
"drivers/acpi/tables.c".
Presently, CXL code isn't able to make use of the CEDT table. Subsequent
to the change, the CEDT table can be used.
If a developer plans to use the CEDT table to program the CXL ports,
this change is needed. Otherwise, it isn't expected to make a difference.
If this should go to linux-acpi as opposed to linux-pm, please excuse
the error.
Regards, Robert (the Old Coder)
[-- Attachment #2: 220111-cedt-patch.txt --]
[-- Type: text/plain, Size: 1083 bytes --]
Subject: Make ACPI subsystem provide CEDT table
Author: Robert Kiraly <me@boldcoder.com>
This is a one-line patch to the "linux-pm" ACPI subsystem 5.16-
rc8.
The patch simply adds ACPI_SIG_CEDT to table_sigs[] in "drivers/
acpi/tables.c".
Presently, CXL code isn't able to make use of the CEDT table.
Subsequent to the change, the CEDT table can be used.
If a developer plans to use the CEDT table to program the CXL
ports, this change is needed. Otherwise, it isn't expected to
make a difference.
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 71419eb16e09..3cccd7a12f22 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -500,7 +500,7 @@ static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = {
ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT,
ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
- ACPI_SIG_NHLT };
+ ACPI_SIG_NHLT, ACPI_SIG_CEDT };
#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
=== end of patch ====
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: One-line patch: Make ACPI provide CEDT table
2022-01-12 5:20 ` One-line patch: Make ACPI provide CEDT table Robert Kiraly
@ 2022-01-12 14:46 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2022-01-12 14:46 UTC (permalink / raw)
To: Robert Kiraly
Cc: Linux PM, Linux Kernel Mailing List, Len Brown, Rafael J. Wysocki
On Wed, Jan 12, 2022 at 6:20 AM Robert Kiraly <me@boldcoder.com> wrote:
>
> The attached patch is a one-line change to linux-pm 5.16-rc8.
>
> The patch simply adds ACPI_SIG_CEDT to table_sigs[] in
> "drivers/acpi/tables.c".
>
> Presently, CXL code isn't able to make use of the CEDT table. Subsequent
> to the change, the CEDT table can be used.
>
> If a developer plans to use the CEDT table to program the CXL ports,
> this change is needed. Otherwise, it isn't expected to make a difference.
>
> If this should go to linux-acpi as opposed to linux-pm, please excuse
> the error.
Yes, it should, but please see this PR too:
https://patchwork.kernel.org/project/linux-acpi/patch/CAPcyv4j0NfC4RKr=VU6yUKrqVRKdAer9YeSezRctpp-k31iAzA@mail.gmail.com/
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-01-12 5:20 ` One-line patch: Make ACPI provide CEDT table Robert Kiraly
2022-01-12 14:46 ` Rafael J. Wysocki
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