Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

Vitaly Kuznetsov
2019-12-03T13:23:54Z

Peter Xu <peterx@redhat.com> writes:

> Callers of kvm_apic_match_dest() should always pass in APIC_DEST_*
> macros for either dest_mode and short_hand parameters. Fix up all the
> callers of kvm_apic_match_dest() that are not following the rule.
>
> Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> arch/x86/kvm/ioapic.c | 11 +++++++----
> arch/x86/kvm/irq_comm.c | 3 ++-
> 2 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
> index 901d85237d1c..1082ca8d11e5 100644
> --- a/arch/x86/kvm/ioapic.c
> +++ b/arch/x86/kvm/ioapic.c
> @@ -108,8 +108,9 @@ static void __rtc_irq_eoi_tracking_restore_one(struct kvm_vcpu *vcpu)
> union kvm_ioapic_redirect_entry *e;
>
> e = &ioapic->redirtbl[RTC_GSI];
> - if (!kvm_apic_match_dest(vcpu, NULL, 0, e->fields.dest_id,
> - e->fields.dest_mode))
> + if (!kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> + e->fields.dest_id,
> + kvm_lapic_irq_dest_mode(e->fields.dest_mode)))
> return;
>
> new_val = kvm_apic_pending_eoi(vcpu, e->fields.vector);
> @@ -237,6 +238,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
> struct dest_map *dest_map = &ioapic->rtc_status.dest_map;
> union kvm_ioapic_redirect_entry *e;
> int index;
> + u16 dm;
>
> spin_lock(&ioapic->lock);
>
> @@ -250,8 +252,9 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
> if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
> kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||
> index == RTC_GSI) {
> - if (kvm_apic_match_dest(vcpu, NULL, 0,
> - e->fields.dest_id, e->fields.dest_mode) ||
> + dm = kvm_lapic_irq_dest_mode(e->fields.dest_mode);

Nit: you could've defined 'dm' right here in the block (after '{') but
in any case I'd suggest to stick to 'dest_mode' and not shorten it to
'dm' for consistency.

> + if (kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> + e->fields.dest_id, dm) ||
> kvm_apic_pending_eoi(vcpu, e->fields.vector))
> __set_bit(e->fields.vector,
> ioapic_handled_vectors);
> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> index 5f59e5ebdbed..e89c2160b39f 100644
> --- a/arch/x86/kvm/irq_comm.c
> +++ b/arch/x86/kvm/irq_comm.c
> @@ -417,7 +417,8 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
>
> kvm_set_msi_irq(vcpu->kvm, entry, &irq);
>
> - if (irq.level && kvm_apic_match_dest(vcpu, NULL, 0,
> + if (irq.level &&
> + kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> irq.dest_id, irq.dest_mode))
> __set_bit(irq.vector, ioapic_handled_vectors);
> }

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

--
Vitaly