Add an ioctl to communicate the consign limit to the host.
Signed-off-by: Michael Wolf <mjw@xxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 6 ++++++
include/linux/kvm_host.h | 2 ++
include/uapi/linux/kvm.h | 2 ++
virt/kvm/kvm_main.c | 7 +++++++
4 files changed, 17 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c91f4c9..5d57469 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5938,6 +5938,12 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
return 0;
}
+int kvm_arch_vcpu_ioctl_set_entitlement(struct kvm_vcpu *vcpu, long entitlement)
+{
+ vcpu->arch.consigned_limit = entitlement;
+ return 0;
+}
+
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
struct i387_fxsave_struct *fxsave =
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 0e2212f..de13648 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -590,6 +590,8 @@ void kvm_arch_hardware_unsetup(void);
void kvm_arch_check_processor_compat(void *rtn);
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
+int kvm_arch_vcpu_ioctl_set_entitlement(struct kvm_vcpu *vcpu,
+ long entitlement);
void kvm_free_physmem(struct kvm *kvm);
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 0a6d6ba..86f24bb 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -921,6 +921,8 @@ struct kvm_s390_ucas_mapping {
#define KVM_SET_ONE_REG _IOW(KVMIO, 0xac, struct kvm_one_reg)
/* VM is being stopped by host */
#define KVM_KVMCLOCK_CTRL _IO(KVMIO, 0xad)
+/* Set the consignment limit which will be used to separete steal time */
+#define KVM_SET_ENTITLEMENT _IOW(KVMIO, 0xae, unsigned long)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index be70035..c712fe5 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2062,6 +2062,13 @@ out_free2:
r = 0;
break;
}
+ case KVM_SET_ENTITLEMENT: {
+ r = kvm_arch_vcpu_ioctl_set_entitlement(vcpu, arg);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
default:
r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
}
--
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