Peter Zijlstra 3cded41794 x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted() ...

Avoid the pointless function call to pv_lock_ops.vcpu_is_preempted()
when a paravirt spinlock enabled kernel is ran on native hardware.

Do this by patching out the CALL instruction with "XOR %RAX,%RAX"
which has the same effect (0 return value).

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: benh@kernel.crashing.org
Cc: boqun.feng@gmail.com
Cc: borntraeger@de.ibm.com
Cc: bsingharora@gmail.com
Cc: dave@stgolabs.net
Cc: jgross@suse.com
Cc: kernellwp@gmail.com
Cc: konrad.wilk@oracle.com
Cc: mpe@ellerman.id.au
Cc: paulmck@linux.vnet.ibm.com
Cc: paulus@samba.org
Cc: pbonzini@redhat.com
Cc: rkrcmar@redhat.com
Cc: will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-11-22 12:48:11 +01:00

..

apic.c

x86/apic: Remove the unused struct apic::apic_id_mask field

2016-07-15 10:39:05 +02:00

debugfs.c

x86/xen: Audit and remove any unnecessary uses of module.h

2016-07-14 15:06:59 +02:00

debugfs.h

debugfs: Add support to print u32 array in debugfs

2012-04-17 00:18:36 -04:00

efi.c

XEN: EFI: Move x86 specific codes to architecture directory

2016-07-06 10:34:46 +01:00

enlighten.c

Merge tag 'for-linus-4.9-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2016-10-24 19:52:24 -07:00

grant-table.c

xen/grant-table: Use kmalloc_array() in arch_gnttab_valloc()

2016-08-26 10:44:22 +01:00

irq.c

x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op

2016-07-25 13:32:34 +01:00

Kconfig

Merge tag 'for-linus-4.3-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2015-09-08 11:46:48 -07:00

Makefile

xen/PMU: Initialization code for Xen PMU

2015-08-20 12:25:20 +01:00

mmu.c

x86/xen: Audit and remove any unnecessary uses of module.h

2016-07-14 15:06:59 +02:00

mmu.h

xen: make a pile of mmu pvop functions static

2011-05-20 14:25:24 -07:00

multicalls.c

x86: Replace __get_cpu_var uses

2014-08-26 13:45:49 -04:00

multicalls.h

xen: use this_cpu_xxx replace percpu_xxx funcs

2012-01-24 12:20:24 -05:00

p2m.c

x86/xen: Audit and remove any unnecessary uses of module.h

2016-07-14 15:06:59 +02:00

pci-swiotlb-xen.c

pci-swiotlb-xen: call pci_request_acs only ifdef CONFIG_PCI

2013-11-08 15:21:44 -05:00

platform-pci-unplug.c

x86/xen: add missing \n at end of printk warning message

2016-09-30 11:21:45 +01:00

pmu.c

xen: Make VPMU init message look less scary

2016-08-24 18:45:38 +01:00

pmu.h

xen/PMU: Intercept PMU-related MSR and APIC accesses

2015-08-20 12:25:25 +01:00

setup.c

x86/e820: Prepare e280 code for switch to dynamic storage

2016-09-21 15:02:12 +02:00

smp.c

xen/x86: Update topology map for PV VCPUs

2016-10-06 11:47:05 +01:00

smp.h

xen/x86: Move irq allocation from Xen smp_op.cpu_up()

2016-08-24 18:44:40 +01:00

spinlock.c

x86/paravirt: Optimize native pv_lock_ops.vcpu_is_preempted()

2016-11-22 12:48:11 +01:00

suspend.c

Merge tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2016-01-12 13:05:36 -08:00

time.c

xen: Remove event channel notification through Xen PCI platform device

2016-09-30 11:44:34 +01:00

trace.c

xen: use generated hypervisor symbols in arch/x86/xen/trace.c

2015-03-16 14:49:13 +00:00

vdso.h

…

vga.c

xen/vga: add the xen EFI video mode support

2012-09-24 09:28:57 -04:00

xen-asm_32.S

x86/paravirt: Remove the unused irq_enable_sysexit pv op

2015-11-23 10:48:16 +01:00

xen-asm_64.S

x86/asm/xen: Set ELF function type for xen_adjust_exception_frame()

2016-02-24 08:35:41 +01:00

xen-asm.h

…

xen-asm.S

x86/asm/xen: Create stack frames in xen-asm.S

2016-02-24 08:35:42 +01:00

xen-head.S

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-03-24 09:47:32 -07:00

xen-ops.h

xen/pvhvm: run xen_vcpu_setup() for the boot CPU

2016-07-25 13:34:23 +01:00