From: Paolo Bonzini <pbonzini@redhat.com>
To: "James Sullivan" <sullivan.james.f@gmail.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org, gleb@kernel.org
Subject: Re: [Patch v5] x86: irq_comm: Add check for RH bit in kvm_set_msi_irq
Date: Tue, 21 Apr 2015 14:18:26 +0200 [thread overview]
Message-ID: <55364012.2040004@redhat.com> (raw)
In-Reply-To: <550B5309.1090805@gmail.com>
On 19/03/2015 23:51, James Sullivan wrote:
> I played around with native_compose_msi_msg and discovered the following:
>
> * dm=0, rh=0 => Physical Destination Mode
> * dm=0, rh=1 => Failed delivery
> * dm=1, rh=0 => Logical Destination Mode, No Redirection
> * dm=1, rh=1 => Logical Destination Mode, Redirection
>
> So it seems to be the case that logical destination mode is used whenever
> DM=1, regardless of RH. Furthermore, the case where DM=0 and RH=1 is
> undefined, as was indicated in the closing response to the thread in
> https://software.intel.com/en-us/forums/topic/288883 :
So this means this patch is not necessary, right?
Paolo
next prev parent reply other threads:[~2015-04-21 12:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-13 15:14 [Patch v5] x86: irq_comm: Add check for RH bit in kvm_set_msi_irq James Sullivan
2015-03-13 15:48 ` Radim Krčmář
2015-03-17 15:23 ` James Sullivan
2015-03-18 22:52 ` Marcelo Tosatti
2015-03-19 0:59 ` James Sullivan
2015-03-19 1:09 ` Marcelo Tosatti
2015-03-19 13:00 ` Radim Krčmář
2015-03-19 22:51 ` James Sullivan
2015-03-20 15:15 ` Radim Krčmář
2015-03-20 15:22 ` James Sullivan
2015-03-20 17:50 ` James Sullivan
2015-03-23 21:13 ` Radim Krčmář
2015-03-23 22:46 ` James Sullivan
2015-03-24 14:03 ` Radim Krčmář
2015-03-24 14:17 ` James Sullivan
2015-04-02 22:08 ` James Sullivan
2015-04-03 10:11 ` Radim Krčmář
2015-04-21 12:18 ` Paolo Bonzini [this message]
2015-04-21 12:44 ` Radim Krčmář
2015-03-19 1:11 ` Marcelo Tosatti
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