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| author | Kyle McMartin <kyle@redhat.com> | 2009-02-04 14:29:19 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-05 16:48:38 +0100 |
| commit | 0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c (patch) | |
| tree | 4dc6093ee08e668a182b38bd13cd85436555c4b6 /drivers/pci/intel-iommu.c | |
| parent | b534816b552d35bbd3c60702139ed5c7da2f55c2 (diff) | |
| download | blackbird-op-linux-0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c.tar.gz blackbird-op-linux-0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c.zip | |
x86: disable intel_iommu support by default
Due to recurring issues with DMAR support on certain platforms.
There's a number of filesystem corruption incidents reported:
https://bugzilla.redhat.com/show_bug.cgi?id=479996
http://bugzilla.kernel.org/show_bug.cgi?id=12578
Provide a Kconfig option to change whether it is enabled by
default.
If disabled, it can still be reenabled by passing intel_iommu=on to the
kernel. Keep the .config option off by default.
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 3dfecb20d5e7..f4b7c79023ff 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -268,7 +268,12 @@ static long list_size; static void domain_remove_dev_info(struct dmar_domain *domain); -int dmar_disabled; +#ifdef CONFIG_DMAR_DEFAULT_ON +int dmar_disabled = 0; +#else +int dmar_disabled = 1; +#endif /*CONFIG_DMAR_DEFAULT_ON*/ + static int __initdata dmar_map_gfx = 1; static int dmar_forcedac; static int intel_iommu_strict; @@ -284,9 +289,12 @@ static int __init intel_iommu_setup(char *str) if (!str) return -EINVAL; while (*str) { - if (!strncmp(str, "off", 3)) { + if (!strncmp(str, "on", 2)) { + dmar_disabled = 0; + printk(KERN_INFO "Intel-IOMMU: enabled\n"); + } else if (!strncmp(str, "off", 3)) { dmar_disabled = 1; - printk(KERN_INFO"Intel-IOMMU: disabled\n"); + printk(KERN_INFO "Intel-IOMMU: disabled\n"); } else if (!strncmp(str, "igfx_off", 8)) { dmar_map_gfx = 0; printk(KERN_INFO |
