From d1423d5679875ebbbc2fc63b33d465baceee0430 Mon Sep 17 00:00:00 2001 From: Chris Wright Date: Tue, 20 Jul 2010 11:06:49 -0700 Subject: intr-remap: allow disabling source id checking Allow disabling the source id checking while programming the interrupt remap table entry. Useful for debugging or working around the broken source id checks on some platforms. Signed-off-by: Chris Wright Acked-by: Suresh Siddha Acked-by: Weidong Han Signed-off-by: David Woodhouse --- drivers/pci/intr_remapping.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index 1315ac688aa2..45478ef7dd74 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -21,6 +21,8 @@ static int ir_ioapic_num, ir_hpet_num; int intr_remapping_enabled; static int disable_intremap; +static int disable_sourceid_checking; + static __init int setup_nointremap(char *str) { disable_intremap = 1; @@ -28,6 +30,22 @@ static __init int setup_nointremap(char *str) } early_param("nointremap", setup_nointremap); +static __init int setup_intremap(char *str) +{ + if (!str) + return -EINVAL; + + if (!strncmp(str, "on", 2)) + disable_intremap = 0; + else if (!strncmp(str, "off", 3)) + disable_intremap = 1; + else if (!strncmp(str, "nosid", 5)) + disable_sourceid_checking = 1; + + return 0; +} +early_param("intremap", setup_intremap); + struct irq_2_iommu { struct intel_iommu *iommu; u16 irte_index; @@ -453,6 +471,8 @@ int free_irte(int irq) static void set_irte_sid(struct irte *irte, unsigned int svt, unsigned int sq, unsigned int sid) { + if (disable_sourceid_checking) + svt = SVT_NO_VERIFY; irte->svt = svt; irte->sq = sq; irte->sid = sid; -- cgit v1.2.1