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

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Only allow FIXED or LOW_PRIO modes.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2021-03-18 10:35:22 +01:00 • committed by Anas Nashif
commit 811fc76780
1 changed files with 8 additions and 1 deletions
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9
drivers/interrupt_controller/intc_intel_vtd.c
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@ -350,6 +350,7 @@ static int vtd_ictl_remap(const struct device *dev,
{ {
struct vtd_ictl_data *data = dev->data; struct vtd_ictl_data *data = dev->data;
union vtd_irte irte = { 0 }; union vtd_irte irte = { 0 };
uint32_t delivery_mode;
irte.bits.vector = vector; irte.bits.vector = vector;
@ -361,8 +362,14 @@ static int vtd_ictl_remap(const struct device *dev,
irte.bits.dst_id = 0xFF << 8; 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.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.redirection_hint = 1;
irte.bits.dst_mode = 1; /* Always logical */ irte.bits.dst_mode = 1; /* Always logical */
irte.bits.present = 1; irte.bits.present = 1;