linux-kernel - Re: [PATCH 0/8] KVM: minor APIC fixes and cleanups

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

Date:	Fri, 30 Jan 2015 16:24:13 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krčmář <rkrcmar@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Nadav Amit <namit@...technion.ac.il>,
	Gleb Natapov <gleb@...nel.org>
Subject: Re: [PATCH 0/8] KVM: minor APIC fixes and cleanups



On 30/01/2015 16:20, Radim Krčmář wrote:
>> > +	/* XXX: A superset of x2APIC broadcasts is fine in practice as long as
>> > +	 * we don't support APIC ID > 0xfeffffff.
>> > +	 */
>> > 
>> > It's ugly. :)
> Yeah, there is: don't deliver x2APIC broadcasts to xAPIC.
> (I'm not even sure if it is correct ...)
> 
> Without that delivery, we could do something like
>   if (irq->dest_id == (x2apic_ipi ? X2APIC_BROADCAST : APIC_BROADCAST))

Nadav, do you know what real hardware does?

Paolo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/