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x86, intr-remap: add option to disable interrupt remapping

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Add option "nointremap" to disable interrupt remapping.

[ Impact: add new boot option ]

Signed-off-by: Suresh Siddha <[email protected]>
Signed-off-by: Weidong Han <[email protected]>
Acked-by: David Woodhouse <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Weidong Han 2009-04-17 16:42:15 +08:00 • committed by Ingo Molnar
commit 03ea815506
2 changed files with 14 additions and 0 deletions
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11
drivers/pci/intr_remapping.c
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@ -15,6 +15,14 @@ static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
static int ir_ioapic_num;
int intr_remapping_enabled;
static int disable_intremap;
static __init int setup_nointremap(char *str)
{
disable_intremap = 1;
return 0;
}
early_param("nointremap", setup_nointremap);
struct irq_2_iommu {
struct intel_iommu *iommu;
u16 irte_index;
@ -506,6 +514,9 @@ int __init intr_remapping_supported(void)
{
struct dmar_drhd_unit *drhd;
if (disable_intremap)
return 0;
for_each_drhd_unit(drhd) {
struct intel_iommu *iommu = drhd->iommu;