From: Zhuocheng Ding <[email protected]>
When the vCPU migrates to a different pCPU, the virtual hfi data
corresponding to the vCPU's hfi index should be updated to the new
pCPU's data.
We don't need to re-register HFI notifier because currently ITD/HFI
virtualization is only supported for client platforms (with only one
HFI instance).
In this case, make the request to update the virtual hfi table.
Tested-by: Yanting Jiang <[email protected]>
Signed-off-by: Zhuocheng Ding <[email protected]>
Co-developed-by: Zhao Liu <[email protected]>
Signed-off-by: Zhao Liu <[email protected]>
---
arch/x86/kvm/vmx/vmx.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 0ad5e3473a28..44c09c995120 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1735,6 +1735,17 @@ static void vmx_dynamic_update_hfi_table(struct kvm_vcpu *vcpu)
mutex_unlock(&kvm_vmx->pkg_therm.pkg_therm_lock);
}
+static void vmx_vcpu_hfi_load(struct kvm_vcpu *vcpu, int cpu)
+{
+ if (!intel_hfi_enabled())
+ return;
+
+ if (!vmx_hfi_initialized(to_kvm_vmx(vcpu->kvm)))
+ return;
+
+ kvm_make_request(KVM_REQ_HFI_UPDATE, vcpu);
+}
+
/*
* Switches to specified vcpu, until a matching vcpu_put(), but assumes
* vcpu mutex is already taken.
@@ -1748,6 +1759,9 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
vmx_vcpu_pi_load(vcpu, cpu);
vmx->host_debugctlmsr = get_debugctlmsr();
+
+ if (unlikely(vcpu->cpu != cpu))
+ vmx_vcpu_hfi_load(vcpu, cpu);
}
static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
--
2.34.1