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From: Roger Pau Monne <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>,
	Roger Pau Monne <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH 0/3] x86: enable x2APIC mode regardless of interrupt remapping support
Date: Thu, 21 Nov 2019 16:54:08 +0100	[thread overview]
Message-ID: <20191121155411.13250-1-roger.pau@citrix.com> (raw)

Hello,

The following series aims to allow enabling x2APIC mode without
interrupt remapping support. The main usage of this would be in
virtualized environments, that usually provide x2APIC support but not
interrupt remapping.

See the last patch for some performance numbers of using x2APIC over
xAPIC when running Xen in pvshim mode.

Thanks, Roger.

Roger Pau Monne (3):
  x86/ioapic: only use dest32 with x2apic and interrupt remapping
    enabled
  x86/smp: check APIC ID on AP bringup
  x86/apic: allow enabling x2APIC mode regardless of interrupt remapping

 xen/arch/x86/apic.c    | 94 +++++++++++++++++++++---------------------
 xen/arch/x86/io_apic.c | 12 +++---
 xen/arch/x86/smpboot.c |  7 ++++
 3 files changed, 59 insertions(+), 54 deletions(-)

-- 
2.24.0


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             reply	other threads:[~2019-11-21 15:54 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-21 15:54 Roger Pau Monne [this message]
2019-11-21 15:54 ` [Xen-devel] [PATCH 1/3] x86/ioapic: only use dest32 with x2apic and interrupt remapping enabled Roger Pau Monne
2019-11-21 15:54 ` [Xen-devel] [PATCH 2/3] x86/smp: check APIC ID on AP bringup Roger Pau Monne
2019-11-21 15:54 ` [Xen-devel] [PATCH 3/3] x86/apic: allow enabling x2APIC mode regardless of interrupt remapping Roger Pau Monne

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