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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2014-03-14 11:00:21 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-04-29 15:01:54 +0200
commit8ad357551797b1edc184fb9f6a4f80a6fa626459 (patch)
tree3700cdc96803f5be483cd79453b240c73b522f3a /include/linux/kvm_host.h
parent6852d7b69b4949234c3a8ae1f279f6a4c6563662 (diff)
KVM: s390: enable IBS for single running VCPUs
This patch enables the IBS facility when a single VCPU is running. The facility is dynamically turned on/off as soon as other VCPUs enter/leave the stopped state. When this facility is operating, some instructions can be executed faster for single-cpu guests. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h2
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