KVM: x86: Fixes posted interrupt check for IRQs delivery modes

Current logic incorrectly uses the enum ioapic_irq_destination_types
to check the posted interrupt destination types. However, the value was
set using APIC_DM_XXX macros, which are left-shifted by 8 bits.

Fixes by using the APIC_DM_FIXED and APIC_DM_LOWEST instead.

Fixes: (fdcf756213 'KVM: x86: Disable posted interrupts for non-standard IRQs delivery modes')
Cc: Alexander Graf <graf@amazon.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <1586239989-58305-1-git-send-email-suravee.suthikulpanit@amd.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Tested-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2020-04-07 01:13:09 -05:00 committed by Paolo Bonzini
parent 7134fa0709
commit 637543a8d6
1 changed files with 2 additions and 2 deletions

View File

@ -1663,8 +1663,8 @@ void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
static inline bool kvm_irq_is_postable(struct kvm_lapic_irq *irq)
{
/* We can only post Fixed and LowPrio IRQs */
return (irq->delivery_mode == dest_Fixed ||
irq->delivery_mode == dest_LowestPrio);
return (irq->delivery_mode == APIC_DM_FIXED ||
irq->delivery_mode == APIC_DM_LOWEST);
}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)