KVM: Add config to support ple or cpu relax optimzation

Suggested-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> # on s390x
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
index 78eb9847008f2cc8eff307a89e330d42b3dcd69a..a6e2677724e169238a8dfa0a6b97200a764734fb 100644 (file)
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/Kconfig
@@ -21,6 +21,7 @@ config KVM
        depends on HAVE_KVM && EXPERIMENTAL
        select PREEMPT_NOTIFIERS
        select ANON_INODES
+       select HAVE_KVM_CPU_RELAX_INTERCEPT
        ---help---
          Support hosting paravirtualized guest machines using the SIE
          virtualization capability on the mainframe. This should work

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index a28f338843eaa083a046ea69dca78f6e3ff541fe..45c044f0fff7a8a4862a2bf05bbacfbb76d3d407 100644 (file)
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -37,6 +37,7 @@ config KVM
        select TASK_DELAY_ACCT
        select PERF_EVENTS
        select HAVE_KVM_MSI
+       select HAVE_KVM_CPU_RELAX_INTERCEPT
        ---help---
          Support hosting fully virtualized guest machines using hardware
          virtualization extensions.  You will need a fairly recent

diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 28694f4a91398998f569c234c7faee104a945259..d01b24b72c61e75f3225776541c2f99824df443e 100644 (file)
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -21,3 +21,6 @@ config KVM_ASYNC_PF
 
 config HAVE_KVM_MSI
        bool
+
+config HAVE_KVM_CPU_RELAX_INTERCEPT
+       bool