linux-kernel - [PATCH 02/16] x86/amd_nb: Restrict init function to AMD-based systems

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: <20241023172150.659002-3-yazen.ghannam@amd.com>
Date: Wed, 23 Oct 2024 17:21:36 +0000
From: Yazen Ghannam <yazen.ghannam@....com>
To: <linux-edac@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <tony.luck@...el.com>, <x86@...nel.org>,
	<avadhut.naik@....com>, <john.allen@....com>, <mario.limonciello@....com>,
	<bhelgaas@...gle.com>, <Shyam-sundar.S-k@....com>, <richard.gong@....com>,
	<jdelvare@...e.com>, <linux@...ck-us.net>, <clemens@...isch.de>,
	<hdegoede@...hat.com>, <ilpo.jarvinen@...ux.intel.com>,
	<linux-pci@...r.kernel.org>, <linux-hwmon@...r.kernel.org>,
	<platform-driver-x86@...r.kernel.org>, <naveenkrishna.chatradhi@....com>,
	<carlos.bilbao.osdev@...il.com>, Yazen Ghannam <yazen.ghannam@....com>
Subject: [PATCH 02/16] x86/amd_nb: Restrict init function to AMD-based systems

The code implicitly operates on AMD-based systems by matching on PCI
IDs. However, the use of these IDs is going away.

Add an explicit CPU vendor check instead of relying on PCI IDs.

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
---
 arch/x86/kernel/amd_nb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index 9fe9972d2071..37b8244899d8 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -582,6 +582,10 @@ static __init void fix_erratum_688(void)
 
 static __init int init_amd_nbs(void)
 {
+	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+	    boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
+		return 0;
+
 	amd_cache_northbridges();
 	amd_cache_gart();
 
-- 
2.43.0