From: "Roger Pau Monné" <roger.pau@citrix.com>
To: <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Wei Liu <wl@xen.org>,
Jan Beulich <jbeulich@suse.com>
Subject: Re: [Xen-devel] [PATCH v2 2/4] x86/apic: force phys mode if interrupt remapping is disabled
Date: Fri, 29 Nov 2019 12:38:13 +0100 [thread overview]
Message-ID: <20191129113813.GX980@Air-de-Roger> (raw)
In-Reply-To: <20191129112851.19273-3-roger.pau@citrix.com>
On Fri, Nov 29, 2019 at 12:28:49PM +0100, Roger Pau Monne wrote:
> Cluster mode can only be used with interrupt remapping support, since
> the top 16bits of the APIC ID are filled with the cluster ID, and
> hence on systems where the physical ID is still smaller than 255 the
> cluster ID is not. Force x2APIC to use physical mode if there's no
> interrupt remapping support.
>
> Note that this requires a further patch in order to enable x2APIC
> without interrupt remapping support.
>
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
This is missing a command line doc update and the logic below ignores
a user-set x2apic_phys value. Will wait for comments on other patches
before resending, sorry.
Roger.
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next prev parent reply other threads:[~2019-11-29 11:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 11:28 [Xen-devel] [PATCH v2 0/4] x86: enable x2APIC mode regardless of interrupt remapping support Roger Pau Monne
2019-11-29 11:28 ` [Xen-devel] [PATCH v2 1/4] x86/ioapic: only use dest32 with x2apic and interrupt remapping enabled Roger Pau Monne
2019-12-03 15:11 ` Jan Beulich
2019-12-04 10:47 ` Roger Pau Monné
2019-11-29 11:28 ` [Xen-devel] [PATCH v2 2/4] x86/apic: force phys mode if interrupt remapping is disabled Roger Pau Monne
2019-11-29 11:38 ` Roger Pau Monné [this message]
2019-12-03 15:14 ` Jan Beulich
2019-12-04 9:17 ` Roger Pau Monné
2019-12-04 9:34 ` Jan Beulich
2019-12-04 10:50 ` Roger Pau Monné
2019-11-29 11:28 ` [Xen-devel] [PATCH v2 3/4] x86/smp: check APIC ID on AP bringup Roger Pau Monne
2019-12-03 15:23 ` Jan Beulich
2019-11-29 11:28 ` [Xen-devel] [PATCH v2 4/4] x86/apic: allow enabling x2APIC mode regardless of interrupt remapping Roger Pau Monne
2019-12-03 15:33 ` Jan Beulich
2019-12-04 13:51 ` Roger Pau Monné
2019-12-04 14:28 ` Jan Beulich
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