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x86, dmar: start with sane state while enabling dma and interrupt-remapping

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Impact: cleanup/sanitization

Start from a sane state while enabling dma and interrupt-remapping, by
clearing the previous recorded faults and disabling previously
enabled queued invalidation and interrupt-remapping.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Suresh Siddha
2009-03-16 17:04:57 -07:00
committed by H. Peter Anvin
parent eba67e5da6
commit 1531a6a6b8
4 changed files with 49 additions and 4 deletions
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2
include/linux/dmar.h
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@ -24,6 +24,7 @@
#include <linux/acpi.h>
#include <linux/types.h>
#include <linux/msi.h>
#include <linux/irqreturn.h>
#if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP)
struct intel_iommu;
@ -125,6 +126,7 @@ extern void dmar_msi_mask(unsigned int irq);
extern void dmar_msi_read(int irq, struct msi_msg *msg);
extern void dmar_msi_write(int irq, struct msi_msg *msg);
extern int dmar_set_interrupt(struct intel_iommu *iommu);
extern irqreturn_t dmar_fault(int irq, void *dev_id);
extern int arch_setup_dmar_msi(unsigned int irq);
#ifdef CONFIG_DMAR