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From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
	Zwane Mwaikambo <zwane@arm.linux.org.uk>,
	"Theodore Ts'o" <tytso@mit.edu>,
	Randy Dunlap <rdunlap@xenotime.net>,
	Dave Jones <davej@redhat.com>,
	Chuck Wolber <chuckw@quantumlinux.com>,
	Chris Wedgwood <reviews@ml.cw.f00f.org>,
	Michael Krufky <mkrufky@linuxtv.org>,
	Chuck Ebbert <cebbert@redhat.com>,
	Domenico Andreoli <cavokz@gmail.com>, Willy Tarreau <w@1wt.eu>,
	Rodrigo Rubira Branco <rbranco@la.checkpoint.com>,
	Jake Edge <jake@lwn.net>, Eugene Teo <eteo@redhat.com>,
	torvalds@linux-foundation.org, akpm@linux-foundation.org,
	alan@lxorguk.ukuu.org.uk, Joerg Roedel <joerg.roedel@amd.com>
Subject: [patch 01/22] AMD IOMMU: enable device isolation per default
Date: Tue, 16 Dec 2008 16:03:53 -0800	[thread overview]
Message-ID: <20081217000353.GB4504@kroah.com> (raw)
In-Reply-To: <20081217000306.GA4504@kroah.com>

[-- Attachment #1: amd-iommu-enable-device-isolation-per-default.patch --]
[-- Type: text/plain, Size: 1772 bytes --]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Joerg Roedel <joerg.roedel@amd.com>

commit 3ce1f93c6d53c3f91c3846cf66b018276c8ac2e7 upstream.

Impact: makes device isolation the default for AMD IOMMU

Some device drivers showed double-free bugs of DMA memory while testing
them with AMD IOMMU. If all devices share the same protection domain
this can lead to data corruption and data loss. Prevent this by putting
each device into its own protection domain per default.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 Documentation/kernel-parameters.txt |    2 +-
 arch/x86/kernel/amd_iommu_init.c    |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -120,7 +120,7 @@ u16 amd_iommu_last_bdf;			/* largest PCI
 LIST_HEAD(amd_iommu_unity_map);		/* a list of required unity mappings
 					   we find in ACPI */
 unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
-int amd_iommu_isolate;			/* if 1, device isolation is enabled */
+int amd_iommu_isolate = 1;		/* if 1, device isolation is enabled */
 
 LIST_HEAD(amd_iommu_list);		/* list of all AMD IOMMUs in the
 					   system */
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -283,7 +283,7 @@ and is between 256 and 4096 characters. 
 			Possible values are:
 			isolate - enable device isolation (each device, as far
 			          as possible, will get its own protection
-			          domain)
+			          domain) [default]
 	amd_iommu_size= [HW,X86-64]
 			Define the size of the aperture for the AMD IOMMU
 			driver. Possible values are:


  reply	other threads:[~2008-12-17  0:05 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20081216235704.347182084@mini.kroah.org>
2008-12-17  0:03 ` [patch 00/22] 2.6.27.10 stable review Greg KH
2008-12-17  0:03   ` Greg KH [this message]
2008-12-18 13:00     ` [patch 01/22] AMD IOMMU: enable device isolation per default Pavel Machek
2008-12-19 11:21       ` Joerg Roedel
2008-12-20 11:26         ` Pavel Machek
2008-12-20 21:48           ` Joerg Roedel
2008-12-19 16:14       ` Greg KH
2008-12-17  0:04   ` [patch 02/22] bonding: fix miimon failure counter Greg KH
2008-12-17  0:04   ` [patch 03/22] Revert "sched_clock: prevent scd->clock from moving backwards" Greg KH
2008-12-17  0:04   ` [patch 04/22] x86 Fix VMI crash on boot in 2.6.28-rc8 Greg KH
2008-12-17  0:04   ` [patch 05/22] lib/idr.c: Fix bug introduced by RCU fix Greg KH
2008-12-17  0:04   ` [patch 06/22] libata: fix Seagate NCQ+FLUSH blacklist Greg KH
2008-12-17  0:04   ` [patch 07/22] e1000e: fix double release of mutex Greg KH
2008-12-17  0:04   ` [patch 08/22] can: Fix CAN_(EFF|RTR)_FLAG handling in can_filter Greg KH
2008-12-17  0:04   ` [patch 09/22] can: omit received RTR frames for single ID filter lists Greg KH
2008-12-17  0:04   ` [patch 10/22] iwlwifi: clean key table in iwl_clear_stations_table function Greg KH
2008-12-17  0:04   ` [patch 11/22] net: eliminate warning from NETIF_F_UFO on bridge Greg KH
2008-12-17  0:04   ` [patch 12/22] unicode table for cp437 Greg KH
2008-12-17  0:04   ` [patch 13/22] console ASCII glyph 1:1 mapping Greg KH
2008-12-17  0:04   ` [patch 14/22] iwlagn: fix RX skb alignment Greg KH
2008-12-17  0:04   ` [patch 15/22] key: fix setkey(8) policy set breakage Greg KH
2008-12-17  0:04   ` [patch 16/22] firewire: fw-ohci: fix IOMMU resource exhaustion Greg KH
2008-12-17  0:04   ` [patch 17/22] ieee1394: add quirk fix for Freecom HDD Greg KH
2008-12-17  0:04   ` [patch 18/22] SUNRPC: Fix a performance regression in the RPC authentication code Greg KH
2008-12-17  0:04   ` [patch 19/22] b1isa: fix b1isa_exit() to really remove registered capi controllers Greg KH
2008-12-17  0:04   ` [patch 20/22] macfb: Do not overflow fb_fix_screeninfo.id Greg KH
2008-12-17  0:04   ` [patch 21/22] V4L/DVB (9621): Avoid writing outside shadow.bytes[] array Greg KH
2008-12-17  0:04   ` [patch 22/22] setup_per_zone_pages_min(): take zone->lock instead of zone->lru_lock Greg KH

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