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KVM: nVMX: Drop unnecessary check on ept caps for execute-only

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Drop the call to cpu_has_vmx_ept_execute_only() when calculating which
EPT capabilities will be exposed to L1 for nested EPT.  The resulting
configuration is immediately sanitized by the passed in @ept_caps, and
except for the call from vmx_check_processor_compat(), @ept_caps is the
capabilities that are queried by cpu_has_vmx_ept_execute_only().  For
vmx_check_processor_compat(), KVM *wants* to ignore vmx_capability.ept
so that a divergence in EPT capabilities between CPUs is detected.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-03-02 18:02:40 -08:00 committed by Paolo Bonzini
parent d8dd54e063
commit 96d4701049
1 changed files with 3 additions and 4 deletions
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7
arch/x86/kvm/vmx/nested.c
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@ -6133,10 +6133,9 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
VMX_EPT_PAGE_WALK_4_BIT |
VMX_EPT_PAGE_WALK_5_BIT |
VMX_EPTP_WB_BIT |
VMX_EPT_INVEPT_BIT;
if (cpu_has_vmx_ept_execute_only())
msrs->ept_caps |=
VMX_EPT_EXECUTE_ONLY_BIT;
VMX_EPT_INVEPT_BIT |
VMX_EPT_EXECUTE_ONLY_BIT;
msrs->ept_caps &= ept_caps;
msrs->ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
VMX_EPT_EXTENT_CONTEXT_BIT | VMX_EPT_2MB_PAGE_BIT |