[PATCH 3/3] aarch64: kvm: introduce CONFIG_KVM_MAX_VCPUS
Andrew Jones
drjones at redhat.com
Sat Sep 14 08:10:56 EDT 2013
Take CONFIG_KVM_MAX_VCPUS from arm32, but set the default to 8.
Signed-off-by: Andrew Jones <drjones at redhat.com>
---
arch/arm64/include/asm/kvm_host.h | 7 ++++++-
arch/arm64/kvm/Kconfig | 11 +++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 0859a4ddd1e7d..d1af8c49a5ca4 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -26,7 +26,12 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
-#define KVM_MAX_VCPUS 4
+#if defined(CONFIG_KVM_MAX_VCPUS)
+#define KVM_MAX_VCPUS CONFIG_KVM_MAX_VCPUS
+#else
+#define KVM_MAX_VCPUS 0
+#endif
+
#define KVM_USER_MEM_SLOTS 32
#define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index 21e90820bd23c..c9924b02e84f7 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -35,6 +35,17 @@ config KVM_ARM_HOST
---help---
Provides host support for ARM processors.
+config KVM_MAX_VCPUS
+ int "Number maximum supported virtual CPUs per VM"
+ depends on KVM_ARM_HOST
+ default 8
+ help
+ Static number of max supported virtual CPUs per VM.
+
+ The default is set to the highest number of vcpus that
+ current hardware supports. Set to a lower number to save
+ some resources. Set to a higher number to test scalability.
+
config KVM_ARM_VGIC
bool
depends on KVM_ARM_HOST && OF
--
1.8.1.4
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