linux-kernel - [patch 1/4] x86: vSMP: Fix is_vsmp

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: <20080320073902.GB9414@localdomain>
Date:	Thu, 20 Mar 2008 00:39:02 -0700
From:	Ravikiran G Thirumalai <kiran@...lex86.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Glauber de Oliveira Costa <gcosta@...hat.com>,
	Andi Kleen <ak@...e.de>, shai@...lex86.org
Subject: [patch 1/4] x86: vSMP: Fix is_vsmp_box()

is_vsmp_box() currently does not work on vSMPowered systems,  as pci cfg
space is not read correctly -- This patch fixes it.

Signed-off-by: Ravikiran Thirumalai <kiran@...lex86.org>

Index: linux.git.trees/arch/x86/kernel/vsmp_64.c
===================================================================
--- linux.git.trees.orig/arch/x86/kernel/vsmp_64.c	2008-03-19 13:30:35.116766719 -0700
+++ linux.git.trees/arch/x86/kernel/vsmp_64.c	2008-03-19 13:39:20.074685590 -0700
@@ -84,8 +84,10 @@ int is_vsmp_box(void)
 		return vsmp;
 
 	/* Check if we are running on a ScaleMP vSMP box */
-	if (read_pci_config(0, 0x1f, 0, PCI_VENDOR_ID) ==
-	     (PCI_VENDOR_ID_SCALEMP || (PCI_DEVICE_ID_SCALEMP_VSMP_CTL << 16)))
+	if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) ==
+	     PCI_VENDOR_ID_SCALEMP) &&
+	    (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) ==
+	    PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
 		vsmp = 1;
 
 	return vsmp;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/