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KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode 

We were using either APIC_DEST_PHYSICAL|APIC_DEST_LOGICAL or 0|1 to
fill in kvm_lapic_irq.dest_mode.  It's fine only because in most cases
when we check against dest_mode it's against APIC_DEST_PHYSICAL (which
equals to 0).  However, that's not consistent.  We'll have problem
when we want to start checking against APIC_DEST_LOGICAL, which does
not equals to 1.

This patch firstly introduces kvm_lapic_irq_dest_mode() helper to take
any boolean of destination mode and return the APIC_DEST_* macro.
Then, it replaces the 0|1 settings of irq.dest_mode with the helper.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Xu 2019-12-04 20:07:18 +01:00 committed by Paolo Bonzini
parent 59508b303e
commit c96001c570
4 changed files with 16 additions and 7 deletions
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5
arch/x86/include/asm/kvm_host.h
View File

@ -1022,6 +1022,11 @@ struct kvm_lapic_irq {
bool msi_redir_hint;
};
static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode_logical)
{
return dest_mode_logical ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL;
}
struct kvm_x86_ops {
int (*cpu_has_kvm_support)(void); /* __init */
int (*disabled_by_bios)(void); /* __init */

9
arch/x86/kvm/ioapic.c
View File

@ -331,7 +331,8 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
irq.vector = e->fields.vector;
irq.delivery_mode = e->fields.delivery_mode << 8;
irq.dest_id = e->fields.dest_id;
irq.dest_mode = e->fields.dest_mode;
irq.dest_mode =
kvm_lapic_irq_dest_mode(!!e->fields.dest_mode);
bitmap_zero(&vcpu_bitmap, 16);
kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
&vcpu_bitmap);
@ -343,7 +344,9 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
* keep ioapic_handled_vectors synchronized.
*/
irq.dest_id = old_dest_id;
irq.dest_mode = old_dest_mode;
irq.dest_mode =
kvm_lapic_irq_dest_mode(
!!e->fields.dest_mode);
kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
&vcpu_bitmap);
}
@ -369,7 +372,7 @@ static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)
irqe.dest_id = entry->fields.dest_id;
irqe.vector = entry->fields.vector;
irqe.dest_mode = entry->fields.dest_mode;
irqe.dest_mode = kvm_lapic_irq_dest_mode(!!entry->fields.dest_mode);
irqe.trig_mode = entry->fields.trig_mode;
irqe.delivery_mode = entry->fields.delivery_mode << 8;
irqe.level = 1;

7
arch/x86/kvm/irq_comm.c
View File

@ -52,8 +52,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
unsigned long dest_vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)];
unsigned int dest_vcpus = 0;
if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
kvm_lowest_prio_delivery(irq)) {
if (irq->dest_mode == APIC_DEST_PHYSICAL &&
irq->dest_id == 0xff && kvm_lowest_prio_delivery(irq)) {
printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
irq->delivery_mode = APIC_DM_FIXED;
}
@ -114,7 +114,8 @@ void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
irq->dest_id |= MSI_ADDR_EXT_DEST_ID(e->msi.address_hi);
irq->vector = (e->msi.data &
MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
irq->dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
irq->dest_mode = kvm_lapic_irq_dest_mode(
!!((1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo));
irq->trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
irq->delivery_mode = e->msi.data & 0x700;
irq->msi_redir_hint = ((e->msi.address_lo

2
arch/x86/kvm/x86.c
View File

@ -7358,7 +7358,7 @@ static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
struct kvm_lapic_irq lapic_irq;
lapic_irq.shorthand = 0;
lapic_irq.dest_mode = 0;
lapic_irq.dest_mode = APIC_DEST_PHYSICAL;
lapic_irq.level = 0;
lapic_irq.dest_id = apicid;
lapic_irq.msi_redir_hint = false;