commit 811fc76780e4dc5296ad0f971485b9bbc9616ed5
author Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> Thu Mar 18 10:35:22 2021 +0100
committer Anas Nashif <anas.nashif@intel.com> Fri Jan 07 10:47:27 2022 -0500
tree 35ad9bda75392289d86f1924b83ca4c2668329ab
parent 92884ba44abc8745f90d4c648acc7d904d428f5c

drivers/interrupt_controller: Fix IRTE delivery mode on VT-D

Only allow FIXED or LOW_PRIO modes.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

drivers/interrupt_controller/intc_intel_vtd.c

diff --git a/drivers/interrupt_controller/intc_intel_vtd.c b/drivers/interrupt_controller/intc_intel_vtd.c
index 2631ae3..47596d1 100644
--- a/drivers/interrupt_controller/intc_intel_vtd.c
+++ b/drivers/interrupt_controller/intc_intel_vtd.c
@@ -350,6 +350,7 @@
 {
 	struct vtd_ictl_data *data = dev->data;
 	union vtd_irte irte = { 0 };
+	uint32_t delivery_mode;
 
 	irte.bits.vector = vector;
 
@@ -361,8 +362,14 @@
 		irte.bits.dst_id = 0xFF << 8;
 	}
 
+	delivery_mode = (flags & IOAPIC_DELIVERY_MODE_MASK);
+	if ((delivery_mode != IOAPIC_FIXED) ||
+	    (delivery_mode != IOAPIC_LOW)) {
+		delivery_mode = IOAPIC_LOW;
+	}
+
 	irte.bits.trigger_mode = (flags & IOAPIC_TRIGGER_MASK) >> 15;
-	irte.bits.delivery_mode = (flags & IOAPIC_DELIVERY_MODE_MASK) >> 8;
+	irte.bits.delivery_mode = delivery_mode >> 8;
 	irte.bits.redirection_hint = 1;
 	irte.bits.dst_mode = 1; /* Always logical */
 	irte.bits.present = 1;