linux-kernel - [RFC PATCH 10/18] KVM: VMX: Extend EPT Violation protection bits

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Message-ID: <20250313203702.575156-11-jon@nutanix.com>
Date: Thu, 13 Mar 2025 13:36:49 -0700
From: Jon Kohler <jon@...anix.com>
To: seanjc@...gle.com, pbonzini@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: Jon Kohler <jon@...anix.com>
Subject: [RFC PATCH 10/18] KVM: VMX: Extend EPT Violation protection bits

Define macros for READ, WRITE, EXEC protection bits, to be used by
MBEC-enabled systems.

No functional change intended.

Signed-off-by: Jon Kohler <jon@...anix.com>

---
 arch/x86/include/asm/vmx.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index d7ab0ad63be6..ffc90d672b5d 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -593,8 +593,17 @@ enum vm_entry_failure_code {
 #define EPT_VIOLATION_GVA_IS_VALID	BIT(7)
 #define EPT_VIOLATION_GVA_TRANSLATED	BIT(8)
 
+#define EPT_VIOLATION_READ_TO_PROT(__epte) (((__epte) & VMX_EPT_READABLE_MASK) << 3)
+#define EPT_VIOLATION_WRITE_TO_PROT(__epte) (((__epte) & VMX_EPT_WRITABLE_MASK) << 3)
+#define EPT_VIOLATION_EXEC_TO_PROT(__epte) (((__epte) & VMX_EPT_EXECUTABLE_MASK) << 3)
 #define EPT_VIOLATION_RWX_TO_PROT(__epte) (((__epte) & VMX_EPT_RWX_MASK) << 3)
 
+static_assert(EPT_VIOLATION_READ_TO_PROT(VMX_EPT_READABLE_MASK) ==
+	      (EPT_VIOLATION_PROT_READ));
+static_assert(EPT_VIOLATION_WRITE_TO_PROT(VMX_EPT_WRITABLE_MASK) ==
+	      (EPT_VIOLATION_PROT_WRITE));
+static_assert(EPT_VIOLATION_EXEC_TO_PROT(VMX_EPT_EXECUTABLE_MASK) ==
+	      (EPT_VIOLATION_PROT_EXEC));
 static_assert(EPT_VIOLATION_RWX_TO_PROT(VMX_EPT_RWX_MASK) ==
 	      (EPT_VIOLATION_PROT_READ | EPT_VIOLATION_PROT_WRITE | EPT_VIOLATION_PROT_EXEC));
 
-- 
2.43.0