Home Explore Help
Register Sign In
FangSoftSoft
/
qemu
mirror of https://github.com/utmapp/qemu.git
2
0
Fork 0
Files Issues 0 Wiki
Browse Source

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: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1563154124-18579-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Wanpeng Li 6 years ago
parent
138985c1ef
commit
d38d201f0e
2 changed files with 5 additions and 2 deletions
Split View Show Diff Stats
  1. 3 1
      linux-headers/linux/kvm.h
  2. 2 1
      target/i386/kvm.c

+ 3 - 1
linux-headers/linux/kvm.h
View File 

@@ -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 {

+ 2 - 1
target/i386/kvm.c
View File 

@@ -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,