Commit d38d201f authored by Wanpeng Li's avatar Wanpeng Li Committed by Paolo Bonzini
Browse files

i386/kvm: support guest access CORE cstate 



Allow guest reads CORE cstate when exposing host CPU power management capabilities
to the guest. PKG cstate is restricted to avoid a guest to get the whole package
information in multi-tenant scenario.

Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
Message-Id: <1563154124-18579-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 138985c1

linux-headers/linux/kvm.h

+3 −1
Original line number Diff line number Diff line
@@ -696,9 +696,11 @@ struct kvm_ioeventfd { 
#define KVM_X86_DISABLE_EXITS_MWAIT          (1 << 0)

#define KVM_X86_DISABLE_EXITS_HLT            (1 << 1)

#define KVM_X86_DISABLE_EXITS_PAUSE          (1 << 2)

#define KVM_X86_DISABLE_EXITS_CSTATE         (1 << 3)

#define KVM_X86_DISABLE_VALID_EXITS          (KVM_X86_DISABLE_EXITS_MWAIT | \

                                              KVM_X86_DISABLE_EXITS_HLT | \

                                              KVM_X86_DISABLE_EXITS_PAUSE)

                                              KVM_X86_DISABLE_EXITS_PAUSE | \

                                              KVM_X86_DISABLE_EXITS_CSTATE)



/* for KVM_ENABLE_CAP */

struct kvm_enable_cap {

target/i386/kvm.c

+2 −1
Original line number Diff line number Diff line
@@ -2076,7 +2076,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s) 
        if (disable_exits) {

            disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT |

                              KVM_X86_DISABLE_EXITS_HLT |

                              KVM_X86_DISABLE_EXITS_PAUSE);

                              KVM_X86_DISABLE_EXITS_PAUSE |

                              KVM_X86_DISABLE_EXITS_CSTATE);

        }



        ret = kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0,