linux-kernel - Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 3 Dec 2019 08:32:55 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org,
        Nitesh Narayan Lal <nitesh@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to
 use correct macros

On Tue, Dec 03, 2019 at 11:27:47AM -0500, Peter Xu wrote:
> On Tue, Dec 03, 2019 at 02:23:47PM +0100, Vitaly Kuznetsov wrote:
> > > @@ -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@...hat.com>
> 
> I'll move the declaration in with your r-b.  'dm' is a silly trick of
> mine to avoid the 80-char line limit.  Thanks,

The 80-char limit isn't an unbreakable rule, it's ok for a line to run a
few chars over when there is no better alternative.