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Juergen Gross e6fd28eb35 locking/spinlocks, paravirt, xen: Correct the xen_nopvspin case 
With the boot parameter "xen_nopvspin" specified a Xen guest should not
make use of paravirt spinlocks, but behave as if running on bare
metal. This is not true, however, as the qspinlock code will fall back
to a test-and-set scheme when it is detecting a hypervisor.

In order to avoid this disable the virt_spin_lock_key.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akataria@vmware.com
Cc: boris.ostrovsky@oracle.com
Cc: chrisw@sous-sol.org
Cc: hpa@zytor.com
Cc: jeremy@goop.org
Cc: rusty@rustcorp.com.au
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20170906173625.18158-3-jgross@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-10 11:50:13 +02:00
..
apic.c
x86/apic: Move cpumask and to core code
2017-06-22 18:21:22 +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
x86/xen/efi: Initialize only the EFI struct members used by Xen
2017-06-23 11:11:03 +02:00
enlighten_hvm.c
xen: fix hvm guest with kaslr enabled
2017-08-11 15:50:26 +02:00
enlighten_pv.c
x86/paravirt: Remove no longer used paravirt functions
2017-09-13 10:55:15 +02:00
enlighten_pvh.c
xen/pvh: Do not fill kernel's e820 map in init_pvh_bootparams()
2017-05-02 11:17:39 +02:00
enlighten.c
xen/vcpu: Handle xen_vcpu_setup() failure in hotplug
2017-06-13 16:10:55 +02:00
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: Get rid of paravirt op adjust_exception_frame
2017-08-31 21:35:10 +02:00
Kconfig
x86: Enable 5-level paging support via CONFIG_X86_5LEVEL=y
2017-07-21 10:05:19 +02:00
Makefile
objtool, x86: Add several functions and files to the objtool whitelist
2017-06-30 10:19:19 +02:00
mmu_hvm.c
x86/xen: split off mmu_hvm.c
2017-05-02 11:05:10 +02:00
mmu_pv.c
xen: fixes for 4.14-rc3
2017-09-29 12:24:28 -07:00
mmu.c
xen/mmu: set MMU_NORMAL_PT_UPDATE in remap_area_mfn_pte_fn
2017-08-31 09:45:55 -04:00
mmu.h
x86/xen: Change __xen_pgd_walk() and xen_cleanmfnmap() to support p4d
2017-03-27 08:56:49 +02:00
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
xen: remove tests for pvh mode in pure pv paths
2017-08-31 09:45:55 -04:00
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
xen: Make VPMU init message look less scary
2016-08-24 18:45:38 +01:00
pmu.h
x86/xen: put setup.c, pmu.c and apic.c under CONFIG_XEN_PV
2017-05-02 11:09:28 +02:00
setup.c
xen: remove tests for pvh mode in pure pv paths
2017-08-31 09:45:55 -04:00
smp_hvm.c
xen/vcpu: Handle xen_vcpu_setup() failure at boot
2017-06-13 16:10:58 +02:00
smp_pv.c
xen/x86: fix cpu hotplug
2017-07-23 08:13:11 +02:00
smp.c
xen/vcpu: Handle xen_vcpu_setup() failure at boot
2017-06-13 16:10:58 +02:00
smp.h
xen/vcpu: Handle xen_vcpu_setup() failure at boot
2017-06-13 16:10:58 +02:00
spinlock.c
locking/spinlocks, paravirt, xen: Correct the xen_nopvspin case
2017-10-10 11:50:13 +02:00
suspend_hvm.c
xen/pvh*: Support > 32 VCPUs at domain restore
2017-06-13 16:05:17 +02:00
suspend_pv.c
x86/xen: split suspend.c for PV and PVHVM guests
2017-05-02 11:09:17 +02:00
suspend.c
x86/xen: split suspend.c for PV and PVHVM guests
2017-05-02 11:09:17 +02:00
time.c
xen/x86: Don't BUG on CPU0 offlining
2017-07-23 08:09:24 +02:00
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/xen: Remove xen_patch()
2017-08-24 09:57:24 +02:00
xen-asm_64.S
x86/xen: Get rid of paravirt op adjust_exception_frame
2017-08-31 21:35:10 +02:00
xen-asm.S
x86/paravirt/xen: Remove xen_patch()
2017-08-24 09:57:24 +02:00
xen-head.S
x86/xen: Redefine XEN_ELFNOTE_INIT_P2M using PUD_SIZE * PTRS_PER_PUD
2017-07-21 10:05:18 +02:00
xen-ops.h
x86/xen: Get rid of paravirt op adjust_exception_frame
2017-08-31 21:35:10 +02:00
xen-pvh.S
x86/boot/64: Rename init_level4_pgt and early_level4_pgt
2017-06-13 08:56:55 +02:00