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authorYouquan Song <youquan.song@intel.com>2008-10-16 16:31:57 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-10-17 08:05:30 +0100
commitcacd4213d8ffed83676f38d5d8e93c673e0f1af7 (patch)
treeffaba6f6b6597973ac7f605809446621dbc8fc6c /drivers/pci/dmar.c
parenta77b67d4023770805141014b8fa9eb5467457817 (diff)
downloadop-kernel-dev-cacd4213d8ffed83676f38d5d8e93c673e0f1af7.zip
op-kernel-dev-cacd4213d8ffed83676f38d5d8e93c673e0f1af7.tar.gz
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>
Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r--drivers/pci/dmar.c20
1 files changed, 5 insertions, 15 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 0f409e2..44d6c70 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -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
+ }
}
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