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Zhenzhong Duan 05eee619ed x86/kvm: Add "nopvspin" parameter to disable PV spinlocks 
There are cases where a guest tries to switch spinlocks to bare metal
behavior (e.g. by setting "xen_nopvspin" on XEN platform and
"hv_nopvspin" on HYPER_V).

That feature is missed on KVM, add a new parameter "nopvspin" to disable
PV spinlocks for KVM guest.

The new 'nopvspin' parameter will also replace Xen and Hyper-V specific
parameters in future patches.

Define variable nopvsin as global because it will be used in future
patches as above.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-08 16:21:57 -04:00
..
acpi
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
apic
The X86 entry, exception and interrupt code rework
2020-06-13 10:05:47 -07:00
cpu
KVM: VMX: Stop context switching MSR_IA32_UMWAIT_CONTROL
2020-06-22 20:54:57 -04:00
fpu
Most of the changes here related to 'XSAVES supervisor state' support,
2020-06-01 14:09:26 -07:00
kprobes
x86/entry: Unbreak __irqentry_text_start/end magic
2020-06-11 15:15:29 +02:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
x86/int3: Inline bsearch()
2020-06-11 15:14:54 +02:00
amd_gart_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
amd_nb.c
x86/amd_nb: Add AMD family 17h model 60h PCI IDs
2020-05-22 18:24:40 +02:00
apb_timer.c
x86/apb_timer: Drop unused TSC calibration
2020-05-27 13:05:59 +02:00
aperture_64.c
…
apm_32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
asm-offsets_32.c
x86 entry code updates:
2020-03-30 19:14:28 -07:00
asm-offsets_64.c
x86/entry: Remove DBn stacks
2020-06-11 15:15:23 +02:00
asm-offsets.c
efi/x86: Avoid using code32_start
2020-03-08 09:58:17 +01:00
audit_64.c
x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall()
2020-05-19 18:03:07 +02:00
bootflag.c
…
check.c
…
cpuid.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 142
2019-05-30 11:25:17 -07:00
crash_core_32.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_core_64.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
crash_dump_32.c
…
crash_dump_64.c
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
crash.c
x86/crash: Use resource_size()
2020-01-09 14:40:03 +01:00
devicetree.c
…
doublefault_32.c
x86/entry: Convert double fault exception to IDTENTRY_DF
2020-06-11 15:15:03 +02:00
dumpstack_32.c
x86/32: Remove CONFIG_DOUBLEFAULT
2020-04-14 14:24:05 +02:00
dumpstack_64.c
x86/entry: Remove DBn stacks
2020-06-11 15:15:23 +02:00
dumpstack.c
kernel: rename show_stack_loglvl() => show_stack()
2020-06-09 09:39:13 -07:00
e820.c
Rebase locking/kcsan to locking/urgent
2020-06-11 20:02:46 +02:00
early_printk.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
early-quirks.c
x86/intel: Disable HPET on Intel Ice Lake platforms
2019-11-29 12:17:58 +01:00
ebda.c
…
eisa.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243
2019-06-19 17:09:07 +02:00
espfix_64.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
ftrace_32.S
x86: Change {JMP,CALL}_NOSPEC argument
2020-04-30 20:14:34 +02:00
ftrace_64.S
x86/entry/64: Move non entry code into .text section
2020-06-11 15:14:37 +02:00
ftrace.c
Linux 5.7-rc6
2020-05-18 13:09:37 +03:00
head32.c
…
head64.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
head_32.S
x86/boot: Remove KEEP_SEGMENTS support
2020-02-22 23:37:37 +01:00
head_64.S
x86/entry: Remove the apic/BUILD interrupt leftovers
2020-06-11 15:15:16 +02:00
hpet.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
hw_breakpoint.c
x86/entry: Optimize local_db_save() for virt
2020-06-11 15:15:22 +02:00
i8237.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
i8253.c
x86/timer: Skip PIT initialization on modern chipsets
2019-06-29 11:35:35 +02:00
i8259.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
idt.c
x86/idt: Consolidate idt functionality
2020-06-11 15:15:26 +02:00
ima_arch.c
EFI updates for v5.7:
2020-02-26 15:21:22 +01:00
io_delay.c
x86/io_delay: Define IO_DELAY macros in C instead of Kconfig
2019-05-24 08:46:06 +02:00
ioport.c
x86/ioperm: Prevent a memory leak when fork fails
2020-05-28 21:36:20 +02:00
irq_32.c
x86/irq: Rework handle_irq() for 64-bit
2020-06-11 15:15:12 +02:00
irq_64.c
x86/entry/64: Move do_softirq_own_stack() to C
2020-06-11 15:15:07 +02:00
irq_work.c
x86/entry: Convert various system vectors
2020-06-11 15:15:14 +02:00
irq.c
x86/entry: Convert KVM vectors to IDTENTRY_SYSVEC*
2020-06-11 15:15:15 +02:00
irqflags.S
x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_*
2019-10-18 11:58:33 +02:00
irqinit.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
itmt.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
jailhouse.c
x86/jailhouse: Only enable platform UARTs if available
2019-10-10 15:43:59 +02:00
jump_label.c
x86/jump_label: Move 'inline' keyword placement
2020-03-27 11:05:41 +01:00
kdebugfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kexec-bzimage64.c
efi/x86: Make fw_vendor, config_table and runtime sysfs nodes x86 specific
2020-02-23 21:59:42 +01:00
kgdb.c
x86/apic: Provide and use helper for send_IPI_allbutself()
2019-07-25 16:12:00 +02:00
ksysfs.c
x86/boot: Introduce setup_indirect
2019-11-12 16:21:15 +01:00
kvm.c
x86/kvm: Add "nopvspin" parameter to disable PV spinlocks
2020-07-08 16:21:57 -04:00
kvmclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
ldt.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
machine_kexec_32.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
machine_kexec_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
Makefile
Rebase locking/kcsan to locking/urgent
2020-06-11 20:02:46 +02:00
mmconf-fam10h_64.c
…
module.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
mpparse.c
x86/boot: Fix memory leak in default_get_smp_config()
2019-07-16 23:13:48 +02:00
msr.c
x86/msr: Restrict MSR access when the kernel is locked down
2019-08-19 21:54:16 -07:00
nmi_selftest.c
…
nmi.c
x86/entry: Make NMI use IDTENTRY_RAW
2020-06-12 14:15:48 +02:00
paravirt_patch.c
x86/paravirt: Standardize 'insn_buff' variable names
2019-04-29 16:05:49 +02:00
paravirt-spinlocks.c
…
paravirt.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
pci-dma.c
dma-mapping updates for 5.5-rc1
2019-11-28 11:16:43 -08:00
pci-iommu_table.c
…
pci-swiotlb.c
dma-mapping: fix filename references
2019-09-03 08:36:30 +02:00
pcspeaker.c
…
perf_regs.c
perf/x86/regs: Check reserved bits
2019-06-24 19:19:24 +02:00
platform-quirks.c
…
pmem.c
…
probe_roms.c
…
process_32.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
process_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
process.c
A set of fixes and updates for x86:
2020-06-11 15:54:31 -07:00
process.h
x86: Use the correct SPDX License Identifier in headers
2019-10-01 20:31:35 +02:00
ptrace.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
pvclock.c
x86/vdso: Use generic VDSO clock mode storage
2020-02-17 14:40:23 +01:00
quirks.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
reboot_fixups_32.c
…
reboot.c
A set of fixes and updates for x86:
2020-06-11 15:54:31 -07:00
relocate_kernel_32.S
x86/asm: Annotate relocate_kernel_{32,64}.c
2019-10-18 09:53:19 +02:00
relocate_kernel_64.S
x86/kexec: Make relocate_kernel_64.S objtool clean
2020-03-25 18:28:28 +01:00
resource.c
…
rtc.c
…
setup_percpu.c
x86/mm: remove vmalloc faulting
2020-06-02 10:59:12 -07:00
setup.c
x86/setup: Add an initrdmem= option to specify initrd physical address
2020-04-27 09:28:16 +02:00
signal_compat.c
…
signal.c
Merge branch 'work.set_fs-exec' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-06-01 16:21:46 -07:00
smp.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
smpboot.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
stacktrace.c
x86 user stack frame reads: switch to explicit __get_user()
2020-02-15 17:26:26 -05:00
step.c
…
sys_ia32.c
x86: switch cp_stat64() to unsafe_put_user()
2020-06-03 16:59:21 -04:00
sys_x86_64.c
x86: Remove unneeded includes
2020-03-21 16:03:25 +01:00
sysfb_efi.c
x86/sysfb_efi: Add quirks for some devices with swapped width and height
2019-07-22 10:47:11 +02:00
sysfb_simplefb.c
x86/sysfb: Fix check for bad VRAM size
2020-01-20 10:57:53 +01:00
sysfb.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tboot.c
mmap locking API: add MMAP_LOCK_INITIALIZER
2020-06-09 09:39:14 -07:00
time.c
A set of fixes and updates for x86:
2020-06-11 15:54:31 -07:00
tls.c
x86/tls: Fix possible spectre-v1 in do_get_thread_area()
2019-06-27 23:48:04 +02:00
tls.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193
2019-05-30 11:29:21 -07:00
topology.c
x86/smp: Replace cpu_up/down() with add/remove_cpu()
2020-03-25 12:59:35 +01:00
trace_clock.c
…
tracepoint.c
x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE
2020-06-11 15:15:16 +02:00
traps.c
x86/entry: Treat BUG/WARN as NMI-like entries
2020-06-12 12:12:57 +02:00
tsc_msr.c
x86 timer updates:
2020-03-30 19:55:39 -07:00
tsc_sync.c
x86: Fix a handful of typos
2020-02-16 20:58:06 +01:00
tsc.c
x86/tsc: Add tsc_early_khz command line parameter
2020-05-21 23:07:00 +02:00
umip.c
x86/umip: Make umip_insns static
2020-04-15 11:13:12 +02:00
unwind_frame.c
x86/entry: Unbreak __irqentry_text_start/end magic
2020-06-11 15:15:29 +02:00
unwind_guess.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
unwind_orc.c
x86/unwind/orc: Fix unwind_get_return_address_ptr() for inactive tasks
2020-05-22 19:55:17 +02:00
uprobes.c
x86/apic, x86/uprobes: Correct parameter names in kernel-doc comments
2019-10-27 09:00:28 +01:00
verify_cpu.S
x86/asm: Annotate local pseudo-functions
2019-10-18 10:04:04 +02:00
vm86_32.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
vmlinux.lds.S
The X86 entry, exception and interrupt code rework
2020-06-13 10:05:47 -07:00
vsmp_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 346
2019-06-05 17:37:08 +02:00
x86_init.c
x86/kvm: Handle async page faults directly through do_page_fault()
2020-05-19 15:53:57 +02:00