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| author | Wanpeng Li | 2018-02-13 02:05:40 +0100 |
|---|---|---|
| committer | Radim Krčmář | 2018-03-06 18:40:44 +0100 |
| commit | a4429e53c9b3082b05e51224c3d58dbdd39306c5 (patch) | |
| tree | d0fbeff12679477198902c365cb23ad6b645747c /arch/s390 | |
| parent | kvm: use insert sort in kvm_io_bus_register_dev function (diff) | |
| download | kernel-qcow2-linux-a4429e53c9b3082b05e51224c3d58dbdd39306c5.tar.gz kernel-qcow2-linux-a4429e53c9b3082b05e51224c3d58dbdd39306c5.tar.xz kernel-qcow2-linux-a4429e53c9b3082b05e51224c3d58dbdd39306c5.zip | |
KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATED
This patch introduces kvm_para_has_hint() to query for hints about
the configuration of the guests. The first hint KVM_HINTS_DEDICATED,
is set if the guest has dedicated physical CPUs for each vCPU (i.e.
pinning and no over-commitment). This allows optimizing spinlocks
and tells the guest to avoid PV TLB flush.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/kvm_para.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm_para.h b/arch/s390/include/asm/kvm_para.h index 74eeec9c0a80..cbc7c3a68e4d 100644 --- a/arch/s390/include/asm/kvm_para.h +++ b/arch/s390/include/asm/kvm_para.h @@ -193,6 +193,11 @@ static inline unsigned int kvm_arch_para_features(void) return 0; } +static inline unsigned int kvm_arch_para_hints(void) +{ + return 0; +} + static inline bool kvm_check_and_clear_guest_paused(void) { return false; |