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dmar: remove the quirk which disables dma-remapping when intr-remapping enabled 

Now that we have DMA-remapping support for queued invalidation, we
can enable both DMA-remapping and interrupt-remapping at the same time.

Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Youquan Song 2008-10-16 16:31:57 -07:00 committed by David Woodhouse
parent a77b67d402
commit cacd4213d8
1 changed files with 5 additions and 15 deletions
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20
drivers/pci/dmar.c
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@ -455,8 +455,8 @@ void __init detect_intel_iommu(void)
ret = early_dmar_detect();
#ifdef CONFIG_DMAR
{
#ifdef CONFIG_INTR_REMAP
struct acpi_table_dmar *dmar;
/*
* for now we will disable dma-remapping when interrupt
@ -465,28 +465,18 @@ void __init detect_intel_iommu(void)
* is added, we will not need this any more.
*/
dmar = (struct acpi_table_dmar *) dmar_tbl;
if (ret && cpu_has_x2apic && dmar->flags & 0x1) {
if (ret && cpu_has_x2apic && dmar->flags & 0x1)
printk(KERN_INFO
"Queued invalidation will be enabled to support "
"x2apic and Intr-remapping.\n");
printk(KERN_INFO
"Disabling IOMMU detection, because of missing "
"queued invalidation support for IOTLB "
"invalidation\n");
printk(KERN_INFO
"Use \"nox2apic\", if you want to use Intel "
" IOMMU for DMA-remapping and don't care about "
" x2apic support\n");
dmar_disabled = 1;
return;
}
#endif
#ifdef CONFIG_DMAR
if (ret && !no_iommu && !iommu_detected && !swiotlb &&
!dmar_disabled)
iommu_detected = 1;
}
#endif
}
}