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Commit b7d20631 authored by Feng Wu's avatar Feng Wu Committed by Paolo Bonzini
Browse files

iommu/vt-d: Add a command line parameter for VT-d posted-interrupts 



Enable VT-d Posted-Interrtups and add a command line
parameter for it.

Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Acked-by: default avatarJoerg Roedel <joro@8bytes.org>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent bf9f6ac8

Documentation/kernel-parameters.txt

+1 −0
Original line number Diff line number Diff line
@@ -1553,6 +1553,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 
			nosid	disable Source ID checking

			no_x2apic_optout

				BIOS x2APIC opt-out request will be ignored

			nopost	disable Interrupt Posting



	iomem=		Disable strict checking of access to MMIO memory

		strict	regions from userspace.

drivers/iommu/irq_remapping.c

+8 −4
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ int irq_remap_broken; 
int disable_sourceid_checking;

int no_x2apic_optout;



int disable_irq_post = 1;

int disable_irq_post = 0;



static int disable_irq_remap;

static struct irq_remap_ops *remap_ops;
@@ -58,14 +58,18 @@ static __init int setup_irqremap(char *str) 
		return -EINVAL;



	while (*str) {

		if (!strncmp(str, "on", 2))

		if (!strncmp(str, "on", 2)) {

			disable_irq_remap = 0;

		else if (!strncmp(str, "off", 3))

			disable_irq_post = 0;

		} else if (!strncmp(str, "off", 3)) {

			disable_irq_remap = 1;

		else if (!strncmp(str, "nosid", 5))

			disable_irq_post = 1;

		} else if (!strncmp(str, "nosid", 5))

			disable_sourceid_checking = 1;

		else if (!strncmp(str, "no_x2apic_optout", 16))

			no_x2apic_optout = 1;

		else if (!strncmp(str, "nopost", 6))

			disable_irq_post = 1;



		str += strcspn(str, ",");

		while (*str == ',')