linux/arch/x86/kvm
Wanpeng Li d5361678e6 KVM: X86: Micro-optimize IPI fastpath delay
This patch optimizes the virtual IPI fastpath emulation sequence:

write ICR2                          send virtual IPI
read ICR2                           write ICR2
send virtual IPI         ==>        write ICR
write ICR

We can observe ~0.67% performance improvement for IPI microbenchmark
(https://lore.kernel.org/kvm/20171219085010.4081-1-ynorov@caviumnetworks.com/)
on Skylake server.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1585189202-1708-4-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-26 05:58:26 -04:00
..
mmu KVM: x86: rename set_cr3 callback and related flags to load_mmu_pgd 2020-03-16 17:58:52 +01:00
vmx KVM: VMX: Gracefully handle faults on VMXON 2020-03-23 15:44:26 -04:00
cpuid.c KVM: x86: Expose fast short REP MOV for supported cpuid 2020-03-23 15:44:24 -04:00
cpuid.h KVM: x86: Refactor kvm_cpuid() param that controls out-of-range logic 2020-03-16 17:58:50 +01:00
debugfs.c KVM: no need to check return value of debugfs_create functions 2019-08-05 12:55:49 +02:00
emulate.c KVM: x86: Refactor kvm_cpuid() param that controls out-of-range logic 2020-03-16 17:58:50 +01:00
hyperv.c kvm: x86: hyperv: Use APICv update request interface 2020-02-05 15:17:43 +01:00
hyperv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
i8254.c KVM: x86: Fix print format and coding style 2020-03-16 17:57:08 +01:00
i8254.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i8259.c KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks 2020-01-27 19:59:37 +01:00
ioapic.c kvm: ioapic: Lazy update IOAPIC EOI 2020-02-05 15:17:44 +01:00
ioapic.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
irq_comm.c KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI 2020-02-21 18:04:57 +01:00
irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 2019-06-05 17:37:05 +02:00
irq.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
Kconfig KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs 2020-01-13 19:35:33 +01:00
kvm_cache_regs.h KVM: x86: Fold decache_cr3() into cache_reg() 2019-10-22 13:34:16 +02:00
kvm_emulate.h KVM: x86: Refactor kvm_cpuid() param that controls out-of-range logic 2020-03-16 17:58:50 +01:00
lapic.c KVM: X86: Micro-optimize IPI fastpath delay 2020-03-26 05:58:26 -04:00
lapic.h KVM: X86: Micro-optimize IPI fastpath delay 2020-03-26 05:58:26 -04:00
Makefile KVM: x86: enable -Werror 2020-02-12 20:15:29 +01:00
mmu_audit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
mmu.h KVM: x86: rename set_cr3 callback and related flags to load_mmu_pgd 2020-03-16 17:58:52 +01:00
mmutrace.h KVM: x86: fix incorrect comparison in trace event 2020-02-20 18:13:44 +01:00
mtrr.c KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks 2020-01-27 19:59:39 +01:00
pmu_amd.c KVM: x86/vPMU: Add lazy mechanism to release perf_event per vPMC 2019-11-15 11:44:10 +01:00
pmu.c KVM: x86: Adjust counter sample period after a wrmsr 2020-03-16 17:57:30 +01:00
pmu.h KVM: x86: Adjust counter sample period after a wrmsr 2020-03-16 17:57:30 +01:00
svm.c KVM: nSVM: check for EFER.SVME=1 before entering guest 2020-03-18 13:41:32 +01:00
trace.h KVM: x86: Add blurb to CPUID tracepoint when using max basic leaf values 2020-03-18 13:44:43 +01:00
tss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x86.c KVM: X86: Micro-optimize IPI fastpath delay 2020-03-26 05:58:26 -04:00
x86.h KVM: CPUID: add support for supervisor states 2020-03-16 17:58:45 +01:00