tag 3.4.7-1.fc16.gnu

1 files changed, 75 insertions, 0 deletions

diff --git a/freed-ora/tags/f16/3.4.7-1.fc16.gnu/linux-2.6-intel-iommu-igfx.patch b/freed-ora/tags/f16/3.4.7-1.fc16.gnu/linux-2.6-intel-iommu-igfx.patch
new file mode 100644
index 000000000..3a45abaec
--- /dev/null
+++ b/freed-ora/tags/f16/3.4.7-1.fc16.gnu/linux-2.6-intel-iommu-igfx.patch
@@ -0,0 +1,75 @@
+From 602e1f209dd983e40d989e871cd253e8187899b8 Mon Sep 17 00:00:00 2001
+From: drago01 <drago01@gmail.com>
+Date: Wed, 26 Oct 2011 13:37:27 -0400
+Subject: [PATCH] Default to igfx_off
+
+This option seems to causes way to many issues, it is
+being investigated by Intel's chipset team for months now and
+we still don't have any outcome.
+
+The results so far are "black screen when starting X",
+"system hangs when using GL", "system does not resume".
+
+The patch adds an intel_iommu=igfx_on option, which makes it opt in,
+rather than opt out.
+
+Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
+Reviewed-by: Adam Jackson <ajax@redhat.com>
+---
+ Documentation/kernel-parameters.txt |   11 +++++------
+ drivers/iommu/intel-iommu.c         |    9 +++++----
+ 2 files changed, 10 insertions(+), 10 deletions(-)
+
+diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
+index 81c287f..ee5693b 100644
+--- a/Documentation/kernel-parameters.txt
++++ b/Documentation/kernel-parameters.txt
+@@ -1014,12 +1014,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
+ 			Enable intel iommu driver.
+ 		off
+ 			Disable intel iommu driver.
+-		igfx_off [Default Off]
+-			By default, gfx is mapped as normal device. If a gfx
+-			device has a dedicated DMAR unit, the DMAR unit is
+-			bypassed by not enabling DMAR with this option. In
+-			this case, gfx device will use physical address for
+-			DMA.
++		igfx_on [Default Off]
++			By default, the gfx's DMAR unit is bypassed by not enabling
++			DMAR with this option. So the gfx device will use physical
++			address for DMA. When this option is enabled it the gfx is
++			mapped as normal device.
+ 		forcedac [x86_64]
+ 			With this option iommu will not optimize to look
+ 			for io virtual address below 32-bit forcing dual
+diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
+index bdc447f..240db6b 100644
+--- a/drivers/iommu/intel-iommu.c
++++ b/drivers/iommu/intel-iommu.c
+@@ -408,7 +408,8 @@ int dmar_disabled = 1;
+ int intel_iommu_enabled = 0;
+ EXPORT_SYMBOL_GPL(intel_iommu_enabled);
+ 
+-static int dmar_map_gfx = 1;
++/* disabled by default; causes way too many issues */
++static int dmar_map_gfx = 0;
+ static int dmar_forcedac;
+ static int intel_iommu_strict;
+ static int intel_iommu_superpage = 1;
+@@ -433,10 +434,10 @@ static int __init intel_iommu_setup(char *str)
+ 		} else if (!strncmp(str, "off", 3)) {
+ 			dmar_disabled = 1;
+ 			printk(KERN_INFO "Intel-IOMMU: disabled\n");
+-		} else if (!strncmp(str, "igfx_off", 8)) {
+-			dmar_map_gfx = 0;
++		} else if (!strncmp(str, "igfx_on", 7)) {
++			dmar_map_gfx = 1;
+ 			printk(KERN_INFO
+-				"Intel-IOMMU: disable GFX device mapping\n");
++				"Intel-IOMMU: enabled GFX device mapping\n");
+ 		} else if (!strncmp(str, "forcedac", 8)) {
+ 			printk(KERN_INFO
+ 				"Intel-IOMMU: Forcing DAC for PCI devices\n");
+-- 
+1.7.7.4
+