linux-kernel - [PATCH v1 09/20] ACPICA: Allow PCC Data Type in MCTP resource

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <9335495.CDJkKcVGEf@rjwysocki.net>
Date: Thu, 29 Aug 2024 20:34:40 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Bob Moore <robert.moore@...el.com>,
 Saket Dumbre <saket.dumbre@...el.com>
Subject: [PATCH v1 09/20] ACPICA: Allow PCC Data Type in MCTP resource

From: Adam Young <ayoung@...erecomputing.com>

ACPICA commit f0776a465cc2c20393bec534c16bdee4a78f7bb7

Explicitly allow QWord address space description type
to be 0xA to indicate it refers to a Platform Communication channel
IAW  ACPI_ECR_PCC_DESCRIPTORS_CF_V2

An entity in a DSDT or in SSDTs that requires
a platform communication channel table (PCCT) entry
to communicate with a remote service will have a single
value that is the index of the entry in the PCCT.

This data type with have a resource_type value of 0xA.

This value indicates that the type shares the same
footprint as a Dword_space section.

Link: https://bugzilla.tianocore.org/show_bug.cgi?id=4594
Link: https://github.com/acpica/acpica/commit/f0776a46
Signed-off-by: Adam Young <ayoung@...erecomputing.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/acpica/rsaddr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/acpica/rsaddr.c b/drivers/acpi/acpica/rsaddr.c
index fff48001d7ef..27384ee245f0 100644
--- a/drivers/acpi/acpica/rsaddr.c
+++ b/drivers/acpi/acpica/rsaddr.c
@@ -282,7 +282,8 @@ acpi_rs_get_address_common(struct acpi_resource *resource,

 	/* Validate the Resource Type */

-	if ((address.resource_type > 2) && (address.resource_type < 0xC0)) {
+	if ((address.resource_type > 2) &&
+	    (address.resource_type < 0xC0) && (address.resource_type != 0x0A)) {
 		return (FALSE);
 	}

-- 
2.43.0