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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2015-01-07 15:31:38 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-01-15 11:24:23 +0100 |
| commit | 5fcee53ce705d49c766f8a302c7e93bdfc33c124 (patch) | |
| tree | 922d80887e04bfa00f9686fc284aa93783d29831 /drivers/iommu/amd_iommu_init.c | |
| parent | 13d09b6603df9df3aa3e410bc2a876889a55c744 (diff) | |
| download | linux-next-5fcee53ce705d49c766f8a302c7e93bdfc33c124.tar.gz | |
x86/apic: Only disable CPU x2apic mode when necessary
When interrupt remapping hardware is not in X2APIC, CPU X2APIC mode
will be disabled if:
1) Maximum CPU APIC ID is bigger than 255
2) hypervisior doesn't support x2apic mode.
But we should only check whether hypervisor supports X2APIC mode when
hypervisor(CONFIG_HYPERVISOR_GUEST) is enabled, otherwise X2APIC will
always be disabled when CONFIG_HYPERVISOR_GUEST is disabled and IR
doesn't work in X2APIC mode.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Tested-by: Joerg Roedel <joro@8bytes.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Rientjes <rientjes@google.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Oren Twaig <oren@scalemp.com>
Link: http://lkml.kernel.org/r/1420615903-28253-12-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
0 files changed, 0 insertions, 0 deletions