Commit 59f7acef authored by Dann Frazier's avatar Dann Frazier

* bugfix/amd64-make-gart-ptes-uncacheable.patch

  Fix silent data corruption using GART iommu (closes: #404148)

svn path=/dists/etch/linux-2.6/; revision=8564
parent 49db5a63
......@@ -25,6 +25,8 @@ linux-2.6 (2.6.18.dfsg.1-13) UNRELEASED; urgency=high
See CVE-2007-2242
* Fix an oops which potentially results in data corruption in the gdth driver.
(closes: #412092)
* bugfix/amd64-make-gart-ptes-uncacheable.patch
Fix silent data corruption using GART iommu (closes: #404148)
[ maximilian attems ]
* Backport support for i965 to agp too. (closes: #406111)
......@@ -34,7 +36,7 @@ linux-2.6 (2.6.18.dfsg.1-13) UNRELEASED; urgency=high
[ Martin Michlmayr ]
* Fix wrong checksum for split TCP packets on 64-bit MIPS. (closes: #421283)
-- dann frazier <dannf@debian.org> Tue, 01 May 2007 19:11:48 -0600
-- dann frazier <dannf@debian.org> Fri, 04 May 2007 15:21:07 -0600
linux-2.6 (2.6.18.dfsg.1-12etch2) stable-security; urgency=high
......
From: Joachim Deguara <joachim.deguara@amd.com>
Date: Tue, 24 Apr 2007 11:05:36 +0000 (+0200)
Subject: [PATCH] x86-64: make GART PTEs uncacheable
X-Git-Tag: v2.6.21~9^2~3
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=cf6387daf8858bdcb3e123034ca422e8979d73f1
[PATCH] x86-64: make GART PTEs uncacheable
This patches fixes the silent data corruption problems being seen using the
GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804
systems). This fix, to mark the memory regin the GART PTEs reside on as
uncacheable, also brings the code in line with the AGP specification.
Signed-off-by: Joachim Deguara <joachim.deguara@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>
---
diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index 2bac8c6..0bae862 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -519,7 +519,11 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
gatt_size = (aper_size >> PAGE_SHIFT) * sizeof(u32);
gatt = (void *)__get_free_pages(GFP_KERNEL, get_order(gatt_size));
if (!gatt)
- panic("Cannot allocate GATT table");
+ panic("Cannot allocate GATT table");
+ if (change_page_attr_addr((unsigned long)gatt, gatt_size >> PAGE_SHIFT, PAGE_KERNEL_NOCACHE))
+ panic("Could not set GART PTEs to uncacheable pages");
+ global_flush_tlb();
+
memset(gatt, 0, gatt_size);
agp_gatt_table = gatt;
......@@ -5,3 +5,4 @@
+ bugfix/jmicron-generic-device-conflict.patch
+ bugfix/ipv6-disallow-RH0-by-default.patch
+ bugfix/gdth_copy_cmd-oops-fix.patch
+ bugfix/amd64-make-gart-ptes-uncacheable.patch
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment