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Subject[PATCH 1/3] x86/kvm/hyper-v: remove stale evmcs_already_enabled check from nested_enable_evmcs()
Date
In nested_enable_evmcs() evmcs_already_enabled check doesn't really do
anything: controls are already sanitized and we return '0' regardless.
Just drop the check.

Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/evmcs.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/arch/x86/kvm/vmx/evmcs.c b/arch/x86/kvm/vmx/evmcs.c
index 72359709cdc1..89c3e0caf39f 100644
--- a/arch/x86/kvm/vmx/evmcs.c
+++ b/arch/x86/kvm/vmx/evmcs.c
@@ -350,17 +350,12 @@ int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
- bool evmcs_already_enabled = vmx->nested.enlightened_vmcs_enabled;

vmx->nested.enlightened_vmcs_enabled = true;

if (vmcs_version)
*vmcs_version = nested_get_evmcs_version(vcpu);

- /* We don't support disabling the feature for simplicity. */
- if (evmcs_already_enabled)
- return 0;
-
vmx->nested.msrs.pinbased_ctls_high &= ~EVMCS1_UNSUPPORTED_PINCTRL;
vmx->nested.msrs.entry_ctls_high &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
vmx->nested.msrs.exit_ctls_high &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
--
2.24.1
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