From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Peter Xu <peterx@redhat.com>,
kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: lapic: stop advertising DIRECTED_EOI when in-kernel IOAPIC is in use
Date: Mon, 05 Mar 2018 11:29:46 +0100 [thread overview]
Message-ID: <87r2oyzug5.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <20180209130133.28387-1-vkuznets@redhat.com> (Vitaly Kuznetsov's message of "Fri, 9 Feb 2018 14:01:33 +0100")
Vitaly Kuznetsov <vkuznets@redhat.com> writes:
> Devices which use level-triggered interrupts under Windows 2016 with
> Hyper-V role enabled don't work: Windows disables EOI broadcast in SPIV
> unconditionally. Our in-kernel IOAPIC implementation emulates an old IOAPIC
> version which has no EOI register so EOI never happens.
>
> The issue was discovered and discussed a while ago:
> https://www.spinics.net/lists/kvm/msg148098.html
>
Radim, Paolo,
do we have a consensus here? (I wouldn't mind re-writing commit message
in case you think we shouldn't blame Windows, I just want to have the
annoying bug fixed :-)
--
Vitaly
next prev parent reply other threads:[~2018-03-05 10:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-09 13:01 [PATCH] KVM: lapic: stop advertising DIRECTED_EOI when in-kernel IOAPIC is in use Vitaly Kuznetsov
2018-02-09 15:20 ` Nikita Leshenko
2018-02-09 16:32 ` Vitaly Kuznetsov
2018-02-11 5:25 ` Peter Xu
2018-02-12 11:30 ` Vitaly Kuznetsov
2018-02-12 11:31 ` Paolo Bonzini
2018-03-05 10:29 ` Vitaly Kuznetsov [this message]
2018-03-07 13:53 ` Radim Krčmář
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