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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2014-04-30 12:29:41 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-04-30 12:29:41 +0200 |
| commit | 57b5981cd38cbca3554c5e663b2361d9adea70c2 (patch) | |
| tree | 7e5403858549becc65710a15889b3c69d498ba8e /include | |
| parent | KVM: x86: expose invariant tsc cpuid bit (v2) (diff) | |
| parent | KVM: s390: enable IBS for single running VCPUs (diff) | |
| download | linux-dev-57b5981cd38cbca3554c5e663b2361d9adea70c2.tar.xz linux-dev-57b5981cd38cbca3554c5e663b2361d9adea70c2.zip | |
Merge tag 'kvm-s390-20140429' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next
1. Guest handling fixes
The handling of MVPG, PFMF and Test Block is fixed to better follow
the architecture. None of these fixes is critical for any current
Linux guests, but let's play safe.
2. Optimization for single CPU guests
We can enable the IBS facility if only one VCPU is running (!STOPPED
state). We also enable this optimization for guest > 1 VCPU as soon
as all but one VCPU is in stopped state. Thus will help guests that
have tools like cpuplugd (from s390-utils) that do dynamic offline/
online of CPUs.
3. NOTES
There is one non-s390 change in include/linux/kvm_host.h that
introduces 2 defines for VCPU requests:
define KVM_REQ_ENABLE_IBS 23
define KVM_REQ_DISABLE_IBS 24
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 820fc2e1d9df..1e125b055327 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -134,6 +134,8 @@ static inline bool is_error_page(struct page *page) #define KVM_REQ_EPR_EXIT 20 #define KVM_REQ_SCAN_IOAPIC 21 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22 +#define KVM_REQ_ENABLE_IBS 23 +#define KVM_REQ_DISABLE_IBS 24 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 |