linux-kernel - Re: [PATCH 2/2] xen/x86: detect support for extended destination ID

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Message-ID: <af1d3964-74fb-3a34-b154-3983773cc2da@suse.com>
Date:   Mon, 7 Feb 2022 10:03:46 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Roger Pau Monne <roger.pau@...rix.com>,
        linux-kernel@...r.kernel.org
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 2/2] xen/x86: detect support for extended destination ID

On 20.01.22 16:25, Roger Pau Monne wrote:
> Xen allows the usage of some previously reserved bits in the IO-APIC
> RTE and the MSI address fields in order to store high bits for the
> target APIC ID. Such feature is already implemented by QEMU/KVM and
> HyperV, so in order to enable it just add the handler that checks for
> it's presence.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@...rix.com>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen

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