Wanpeng Li a9ab13ff6e KVM: X86: Improve latency for single target IPI fastpath ... IPI and Timer cause the main MSRs write vmexits in cloud environment observation, let's optimize virtual IPI latency more aggressively to inject target IPI as soon as possible. Running kvm-unit-tests/vmexit.flat IPI testing on SKX server, disable adaptive advance lapic timer and adaptive halt-polling to avoid the interference, this patch can give another 7% improvement. w/o fastpath -> x86.c fastpath 4238 -> 3543 16.4% x86.c fastpath -> vmx.c fastpath 3543 -> 3293 7% w/o fastpath -> vmx.c fastpath 4238 -> 3293 22.3% Cc: Haiwei Li <lihaiwei@tencent.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200410174703.1138-3-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-04-21 09:13:10 -04:00
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asm	KVM: X86: Improve latency for single target IPI fastpath	2020-04-21 09:13:10 -04:00
uapi/asm	KVM: nVMX: Emulate MTF when performing instruction emulation	2020-02-23 09:36:23 +01:00