2018-03-15 0:11 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>: > On 12/03/2018 12:53, Wanpeng Li wrote: >> Provides userspace with per-VM capability(KVM_CAP_X86_DISABLE_EXITS) to >> not intercept MWAIT/HLT/PAUSE in order that to improve latency in some >> workloads. >> >> The patchset implements the original proposal from Radim. >> https://www.spinics.net/lists/kvm/msg146879.html >> >> In addition, thanks to Jan H. Schönherr's attempt last year. >> >> v1 -> v2: >> * remove blinding setting KVM_ENABLE_CAP statement in doc >> * move PV_UNHALT associated statement to 2/3 >> * rename kvm_mwait_can_in_guest to kvm_can_mwait_in_guest >> * remove unconditionally set INTERCEPT HLT in svm >> * call vmx_clear_hlt() from pre_enter_smm() >> * add a check to kvm_update_cpuid() that forbits KVM_FEATURE_PV_UNHALT >> when halt exits are disabld >> >> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> >> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> >> Cc: Jan H. Schönherr <jschoenh@xxxxxxxxx> >> >> Wanpeng Li (3): >> KVM: X86: Provides userspace with a capability to not intercept MWAIT >> KVM: X86: Provides userspace with a capability to not intercept HLT >> KVM: X86: Provides userspace with a capability to not intercept PAUSE >> >> Documentation/virtual/kvm/api.txt | 24 ++++++++++++------- >> arch/x86/include/asm/kvm_host.h | 4 ++++ >> arch/x86/kvm/cpuid.c | 5 ++++ >> arch/x86/kvm/svm.c | 9 ++++--- >> arch/x86/kvm/vmx.c | 50 ++++++++++++++++++++++++++++++++------- >> arch/x86/kvm/x86.c | 29 +++++++++++++++++++---- >> arch/x86/kvm/x86.h | 24 +++++++++++++++---- >> include/uapi/linux/kvm.h | 2 +- >> tools/include/uapi/linux/kvm.h | 2 +- >> 9 files changed, 118 insertions(+), 31 deletions(-) >> > > Queued, thanks. Thanks Paolo. :) >Do you have QEMU patches to automatically enable this > together with HINTS_DEDICATED? I will cook the patches. :) Regards, Wanpeng Li
