linux/arch/x86/kernel/apic
Jiang Liu 5fcee53ce7 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>
2015-01-15 11:24:23 +01:00
..
apic_flat_64.c x86, apic: Remove enable_apic_mode callback 2014-07-31 08:05:44 -07:00
apic_noop.c x86, apic: Remove enable_apic_mode callback 2014-07-31 08:05:44 -07:00
apic_numachip.c x86: numachip: APIC driver cleanups 2014-11-04 18:17:27 +01:00
apic.c x86/apic: Only disable CPU x2apic mode when necessary 2015-01-15 11:24:23 +01:00
bigsmp_32.c x86, apic: Remove enable_apic_mode callback 2014-07-31 08:05:44 -07:00
htirq.c x86, irq: Use helpers to access irq_cfg data structure associated with IRQ 2014-12-16 14:08:17 +01:00
hw_nmi.c x86/nmi: Fix use of unallocated cpumask_var_t 2014-11-25 14:15:30 -05:00
io_apic.c x86, irq: Use helpers to access irq_cfg data structure associated with IRQ 2014-12-16 14:08:17 +01:00
ipi.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
Makefile x86, irq: Move HT IRQ related code from io_apic.c into htirq.c 2014-12-16 14:08:17 +01:00
msi.c x86, irq: Use helpers to access irq_cfg data structure associated with IRQ 2014-12-16 14:08:17 +01:00
probe_32.c x86, apic: Remove enable_apic_mode callback 2014-07-31 08:05:44 -07:00
probe_64.c x86/platform: Introduce APIC post-initialization callback 2012-06-06 09:06:19 +02:00
vector.c x86, irq: Use helpers to access irq_cfg data structure associated with IRQ 2014-12-16 14:08:17 +01:00
x2apic_cluster.c percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix 2014-09-09 07:17:43 +09:00
x2apic_phys.c x86, apic: Remove enable_apic_mode callback 2014-07-31 08:05:44 -07:00
x2apic_uv_x.c Merge branches 'x86-ras-for-linus', 'x86-uv-for-linus' and 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-14 02:31:22 +02:00