linux-kernel - [PATCH v13 12/12] PCI: ACPI: Limit the Intel specific opt-in to D3 to 2024

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20230818051319.551-13-mario.limonciello@amd.com>
Date:   Fri, 18 Aug 2023 00:13:19 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Bjorn Helgaas <helgaas@...nel.org>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>,
        <linux-acpi@...r.kernel.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Iain Lane" <iain@...ngesquash.org.uk>,
        Shyam-sundar S-k <Shyam-sundar.S-k@....com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v13 12/12] PCI: ACPI: Limit the Intel specific opt-in to D3 to 2024

Intel systems that need to have PCIe ports in D3 for low power idle
specify this by constraints on the ACPI PNP0D80 device. As this information
is queried, limit the DMI BIOS year check to stop at 2024. This will
allow future systems to rely on the constraints check to set up policy
like non-Intel systems do.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v12->v13:
 * New patch
---
 drivers/pci/pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0fc8d35154f97..5b9e11e254f34 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3049,10 +3049,11 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
 			return true;
 
 		/*
-		 * It is safe to put Intel PCIe ports from 2015 or newer
+		 * It is safe to put Intel PCIe ports from 2015 to 2024
 		 * to D3.
 		 */
 		if (bridge->vendor == PCI_VENDOR_ID_INTEL &&
+		    dmi_get_bios_year() <= 2024 &&
 		    dmi_get_bios_year() >= 2015)
 			return true;
 		break;
-- 
2.34.1