From 03ea81550676296d94596e4337c771c6ba29f542 Mon Sep 17 00:00:00 2001 From: Weidong Han Date: Fri, 17 Apr 2009 16:42:15 +0800 Subject: x86, intr-remap: add option to disable interrupt remapping Add option "nointremap" to disable interrupt remapping. [ Impact: add new boot option ] Signed-off-by: Suresh Siddha Signed-off-by: Weidong Han Acked-by: David Woodhouse Cc: iommu@lists.linux-foundation.org Cc: allen.m.kay@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1239957736-6161-5-git-send-email-weidong.han@intel.com> Signed-off-by: Ingo Molnar --- drivers/pci/intr_remapping.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index 5c2142656e96..842039e4955b 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -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; -- cgit v1.2.1