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9ee83635d8
linux/arch/x86/kernel
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Li RongQing 9ee83635d8 KVM: x86: Yield to IPI target vCPU only if it is busy 
When sending a call-function IPI-many to vCPUs, yield to the
IPI target vCPU which is marked as preempted.

but when emulating HLT, an idling vCPU will be voluntarily
scheduled out and mark as preempted from the guest kernel
perspective. yielding to idle vCPU is pointless and increase
unnecessary vmexit, maybe miss the true preempted vCPU

so yield to IPI target vCPU only if vCPU is busy and preempted

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Message-Id: <1644380201-29423-1-git-send-email-lirongqing@baidu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-02-25 10:09:35 -05:00
..
acpi - Get rid of all the .fixup sections because this generates 2022-01-12 16:31:19 -08:00
apic bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
cpu x86/cpu: Add Xeon Icelake-D to list of CPUs that support PPIN 2022-01-25 18:40:30 +01:00
fpu x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0 2022-02-17 10:05:57 -05:00
kprobes x86: Prepare inline-asm for straight-line-speculation 2021-12-08 19:23:12 +01:00
.gitignore
alternative.c x86/alternative: Relax text_poke_bp() constraint 2021-12-09 11:04:50 +01:00
amd_gart_64.c x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR 2021-08-09 17:13:06 +02:00
amd_nb.c hwmon updates for v5.17 2022-01-11 10:25:36 -08:00
aperture_64.c proc/vmcore: convert oldmem_pfn_is_ram callback to more generic vmcore callbacks 2021-11-09 10:02:48 -08:00
apm_32.c x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
asm-offsets_32.c x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
asm-offsets_64.c x86/xen: Drop USERGS_SYSRET64 paravirt call 2021-02-10 12:32:07 +01:00
asm-offsets.c um, x86: bury crypto_tfm_ctx_offset 2021-12-21 21:31:35 +01:00
audit_64.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
bootflag.c
cc_platform.c hyperv-next for 5.17 2022-01-16 15:53:00 +02:00
check.c
cpuid.c
crash_core_32.c
crash_core_64.c
crash_dump_32.c
crash_dump_64.c x86/sev: Replace occurrences of sev_active() with cc_platform_has() 2021-10-04 11:46:58 +02:00
crash.c x86/crash: Remove crash_reserve_low_1M() 2021-06-07 12:14:45 +02:00
devicetree.c Devicetree updates for v5.16: 2021-11-02 22:22:13 -07:00
doublefault_32.c exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit 2021-10-20 13:09:43 -05:00
dumpstack_32.c
dumpstack_64.c x86/mm/64: Improve stack overflow warnings 2021-09-21 13:57:43 +02:00
dumpstack.c exit: Add and use make_task_dead. 2021-12-13 12:04:45 -06:00
e820.c Power management updates for 5.13-rc1 2021-04-26 15:10:25 -07:00
early_printk.c
early-quirks.c pci-v5.17-fixes-1 2022-01-21 09:10:46 +02:00
ebda.c
eisa.c
espfix_64.c
ftrace_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
ftrace_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
ftrace.c x86: Add straight-line-speculation mitigation 2021-12-09 13:32:25 +01:00
head32.c
head64.c - Flush *all* mappings from the TLB after switching to the trampoline 2022-01-10 09:51:38 -08:00
head_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
head_64.S x86/mm/64: Flush global TLB on boot and AP bringup 2021-12-06 09:38:48 +01:00
hpet.c rtc: Check return value from mc146818_get_time() 2021-12-16 21:50:06 +01:00
hw_breakpoint.c x86/debug: Prevent data breakpoints on cpu_dr7 2021-02-05 20:13:12 +01:00
i8237.c
i8253.c
i8259.c x86: Avoid magic number with ELCR register accesses 2021-08-10 23:31:43 +02:00
idt.c X86 interrupt related changes: 2021-06-29 12:36:59 -07:00
io_delay.c
ioport.c
irq_32.c x86/softirq: Disable softirq stacks on PREEMPT_RT 2021-09-27 12:28:32 +02:00
irq_64.c x86/softirq/64: Inline do_softirq_own_stack() 2021-02-10 23:34:17 +01:00
irq_work.c
irq.c x86/irq: Ensure PI wakeup handler is unregistered before module unload 2021-10-22 12:45:35 -04:00
irqflags.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
irqinit.c
itmt.c x86/sched: Decrease further the priorities of SMT siblings 2021-10-05 15:51:59 +02:00
jailhouse.c
jump_label.c jump_labels: Mark __jump_label_transform() as __always_inlined to work around aggressive compiler un-inlining 2021-07-13 06:32:05 +02:00
kdebugfs.c
kexec-bzimage64.c x86: Use ELF fields defined in 'struct kimage' 2021-03-08 12:06:29 -07:00
kgdb.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
ksysfs.c
kvm.c KVM: x86: Yield to IPI target vCPU only if it is busy 2022-02-25 10:09:35 -05:00
kvmclock.c x86/kvmclock: Fix Hyper-V Isolated VM's boot issue when vCPUs > 64 2022-02-25 10:09:34 -05:00
ldt.c memcg: enable accounting for ldt_struct objects 2021-09-03 09:58:13 -07:00
machine_kexec_32.c x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c 2021-05-21 12:36:45 +02:00
machine_kexec_64.c x86/sev: Replace occurrences of sev_active() with cc_platform_has() 2021-10-04 11:46:58 +02:00
Makefile arch: Make ARCH_STACKWALK independent of STACKTRACE 2021-12-10 14:06:03 +00:00
mmconf-fam10h_64.c x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
module.c mm: defer kmemleak object creation of module_alloc() 2022-01-15 16:30:25 +02:00
mpparse.c x86: Avoid magic number with ELCR register accesses 2021-08-10 23:31:43 +02:00
msr.c x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too 2021-01-27 19:06:47 +01:00
nmi_selftest.c
nmi.c x86/sev-es: Rename sev-es.{ch} to sev.{ch} 2021-05-10 07:40:27 +02:00
paravirt-spinlocks.c x86/paravirt: Add new features for paravirt patching 2021-03-11 19:51:49 +01:00
paravirt.c x86: Prepare inline-asm for straight-line-speculation 2021-12-08 19:23:12 +01:00
pci-dma.c
pci-iommu_table.c x86: Remove definition of DEBUG 2021-01-15 08:23:10 +01:00
pci-swiotlb.c x86/sme: Replace occurrences of sme_active() with cc_platform_has() 2021-10-04 11:46:46 +02:00
pcspeaker.c
perf_regs.c
platform-quirks.c
pmem.c
probe_roms.c x86/pci/probe_roms: Use to_pci_driver() instead of pci_dev->driver 2021-10-18 09:20:15 -05:00
process_32.c x86/fpu: Move context switch and exit to user inlines into sched.h 2021-10-20 15:27:27 +02:00
process_64.c x86/fpu: Move context switch and exit to user inlines into sched.h 2021-10-20 15:27:27 +02:00
process.c RISCV: 2022-01-16 16:15:14 +02:00
process.h x86: Snapshot thread flags 2021-12-01 00:06:43 +01:00
ptrace.c x86/fpu: Remove internal.h dependency from fpu/signal.h 2021-10-20 15:27:29 +02:00
pvclock.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
quirks.c
reboot_fixups_32.c
reboot.c x86/mm: Flush global TLB when switching to trampoline page-table 2021-12-06 09:54:10 +01:00
relocate_kernel_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
relocate_kernel_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
resource.c x86/PCI: Ignore E820 reservations for bridge windows on newer systems 2022-01-11 16:22:37 +01:00
rtc.c
setup_percpu.c mm: percpu: add generic pcpu_populate_pte() function 2022-01-20 08:52:52 +02:00
setup.c - Add support for decoding instructions which do MMIO accesses in order 2022-01-10 10:00:03 -08:00
sev_verify_cbit.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
sev-shared.c x86/sev: Shorten GHCB terminate macro names 2021-11-15 20:31:16 +01:00
sev.c - Add support for decoding instructions which do MMIO accesses in order 2022-01-10 10:00:03 -08:00
signal_compat.c signal: Verify the alignment and size of siginfo_t 2021-07-23 13:15:31 -05:00
signal.c x86/signal: Use fpu::__state_user_size for sigalt stack validation 2021-10-26 10:18:09 +02:00
smp.c x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
smpboot.c sched,x86: Don't use cluster topology for x86 hybrid CPUs 2021-12-08 22:15:37 +01:00
stacktrace.c stacktrace: Move documentation for arch_stack_walk_reliable() to header 2021-03-10 15:52:31 +01:00
static_call.c x86: Add straight-line-speculation mitigation 2021-12-09 13:32:25 +01:00
step.c entry: Ensure trap after single-step on system call return 2021-02-06 00:21:42 +01:00
sys_ia32.c
sys_x86_64.c x86/mm: Refine mmap syscall implementation 2021-01-05 19:07:42 +01:00
tboot.c x86/boot/tboot: Avoid Wstringop-overread-warning 2021-03-23 00:16:13 +01:00
time.c
tls.c x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
tls.h
topology.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
trace_clock.c
trace.c trace/osnoise: Fix an ifdef comment 2021-10-25 23:02:36 -04:00
tracepoint.c
traps.c - Do not #GP on userspace use of CLI/STI but pretend it was a NOP to 2021-11-02 07:56:47 -07:00
tsc_msr.c
tsc_sync.c x86/tsc: Add a timer to make sure TSC_adjust is always checked 2021-12-02 00:40:35 +01:00
tsc.c x86/tsc: Disable clocksource watchdog for TSC on qualified platorms 2021-12-02 00:40:36 +01:00
umip.c x86/umip: Downgrade warning messages to debug loglevel 2021-09-25 13:23:28 +02:00
unwind_frame.c x86/unwind: Recover kretprobe trampoline entry 2021-09-30 21:24:07 -04:00
unwind_guess.c x86/unwind: Recover kretprobe trampoline entry 2021-09-30 21:24:07 -04:00
unwind_orc.c Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
uprobes.c x86/uprobes: Convert to insn_decode() 2021-03-15 12:05:03 +01:00
verify_cpu.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
vm86_32.c signal: Replace force_fatal_sig with force_exit_sig when in doubt 2021-11-19 09:15:58 -06:00
vmlinux.lds.S x86: Remove .fixup section 2021-12-11 09:09:50 +01:00
vsmp_64.c
x86_init.c PCI/MSI: Make arch_restore_msi_irqs() less horrible. 2021-12-09 11:52:21 +01:00