From: Youquan Song <youquan.song@intel.com>
Subject: 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>
---
Index: tip/drivers/pci/dmar.c
===================================================================
--- tip.orig/drivers/pci/dmar.c 2008-10-08 09:49:30.000000000 -0700
+++ tip/drivers/pci/dmar.c 2008-10-08 10:13:36.000000000 -0700
@@ -462,39 +462,22 @@
ret = dmar_table_detect();
-#ifdef CONFIG_DMAR
{
+#ifdef CONFIG_INTR_REMAP
struct acpi_table_dmar *dmar;
- /*
- * for now we will disable dma-remapping when interrupt
- * remapping is enabled.
- * When support for queued invalidation for IOTLB invalidation
- * 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;
- goto end;
- }
+#endif
+#ifdef CONFIG_DMAR
if (ret && !no_iommu && !iommu_detected && !swiotlb &&
!dmar_disabled)
iommu_detected = 1;
- }
-end:
#endif
+ }
if (dmar_tbl)
early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size);
--
--
