linux-kernel - [PATCH 0/2] xen/x86: use extended destination mode if available

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Message-ID: <20220120152527.7524-1-roger.pau@citrix.com>
Date:   Thu, 20 Jan 2022 16:25:25 +0100
From:   Roger Pau Monne <roger.pau@...rix.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Roger Pau Monne <roger.pau@...rix.com>
Subject: [PATCH 0/2] xen/x86: use extended destination mode if available

Hello,

Following two patches enable the usage of the extended destination ID if
supported by Xen. This is the same feature already supported by QEMU/KVM
and HyperV.

First patch can probably go in regardless of whether Xen ends up
implementing the extended destination ID, there's no reason to prevent a
VM from using x2APIC mode.

Thanks, Roger.

Roger Pau Monne (2):
  xen/x2apic: enable x2apic mode when supported
  xen/x86: detect support for extended destination ID

 arch/x86/include/asm/xen/cpuid.h | 7 +++++++
 arch/x86/xen/enlighten_hvm.c     | 9 ++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

-- 
2.34.1