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47b428d14f
linux/arch/x86/xen
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Waiman Long 47b428d14f xen/spinlock: Don't use pvqspinlock if only 1 vCPU 
On a VM with only 1 vCPU, the locking fast paths will always be
successful. In this case, there is no need to use the the PV qspinlock
code which has higher overhead on the unlock side than the native
qspinlock code.

The xen_pvspin veriable is also turned off in this 1 vCPU case to
eliminate unneeded pvqspinlock initialization in xen_init_lock_cpu()
which is run after xen_init_spinlocks().

Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2018-07-26 23:05:14 -04:00
..
apic.c Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready 2018-04-12 09:42:34 +02:00
debugfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi.c x86/xen/efi: Initialize UEFI secure boot state during dom0 boot 2018-05-14 08:57:46 +02:00
enlighten_hvm.c x86/xen: Reset VCPU0 info pointer after shared_info remap 2018-05-07 15:03:43 -04:00
enlighten_pv.c xen: setup pv irq ops vector earlier 2018-07-13 08:23:27 +02:00
enlighten_pvh.c xen: share start flags between PV and PVH 2018-06-19 13:51:00 +02:00
enlighten.c xen: share start flags between PV and PVH 2018-06-19 13:51:00 +02:00
grant-table.c xen: re-introduce support for grant v2 interface 2017-11-06 15:50:17 -05:00
irq.c xen: setup pv irq ops vector earlier 2018-07-13 08:23:27 +02:00
Kconfig x86/xen: Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL 2018-02-21 10:19:18 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmu_hvm.c x86/gart: Exclude GART aperture from vmcore 2018-01-11 15:09:24 +01:00
mmu_pv.c tracing/x86/xen: Remove zero data size trace events trace_xen_mmu_flush_tlb{_all} 2018-05-14 17:02:30 -04:00
mmu.c xen: fixes and features for v4-18-rc1 2018-06-08 09:24:54 -07:00
mmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
multicalls.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
multicalls.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
p2m.c xen: Fix {set,clear}_foreign_p2m_mapping on autotranslating guests 2018-02-08 10:40:49 +01:00
pci-swiotlb-xen.c xen-swiotlb: consolidate xen_swiotlb_dma_ops 2017-06-20 11:12:59 +02:00
platform-pci-unplug.c xen/pvh: PVH guests always have PV devices 2017-02-07 08:07:01 -05:00
pmu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
setup.c xen: fixes for 4.15-rc5 2017-12-22 12:30:10 -08:00
smp_hvm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp_pv.c x86/xen: Add call of speculative_store_bypass_ht_init() to PV paths 2018-06-21 10:55:52 +02:00
smp.c x86/xen: Calculate __max_logical_packages on PV domains 2018-02-17 09:40:45 +01:00
smp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock.c xen/spinlock: Don't use pvqspinlock if only 1 vCPU 2018-07-26 23:05:14 -04:00
suspend_hvm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
suspend_pv.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
suspend.c x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend 2018-02-28 16:03:19 +01:00
time.c x86: Convert x86_platform_ops to timespec64 2018-05-19 14:03:14 +02:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso.h
vga.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-asm_32.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-asm_64.S x86/xen: Support early interrupts in xen pv guests 2017-11-28 00:28:56 +01:00
xen-asm.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-head.S xen/pvh: Indicate XENFEAT_linux_rsdp_unrestricted to Xen 2018-04-10 09:22:22 -04:00
xen-ops.h xen: fixes for 4.15-rc8 2018-01-12 10:00:15 -08:00
xen-pvh.S xen/PVH: Make GDT selectors PVH-specific 2018-06-04 10:06:08 +02:00