linux-kernel - [PATCH 6/7] KVM, x86: add architectural support code for #VE

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Message-ID: <20240507154459.3950778-7-pbonzini@redhat.com>
Date: Tue,  7 May 2024 11:44:58 -0400
From: Paolo Bonzini <pbonzini@...hat.com>
To: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: [PATCH 6/7] KVM, x86: add architectural support code for #VE

Dump the contents of the #VE info data structure and assert that #VE does
not happen, but do not yet do anything with it.

No functional change intended, separated for clarity only.

Extracted from a patch by Isaku Yamahata <isaku.yamahata@...el.com>.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/include/asm/vmx.h | 12 ++++++++++++
 arch/x86/kvm/vmx/vmx.c     |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index ac6da0a5f5e6..d77a31039f24 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -71,6 +71,7 @@
 #define SECONDARY_EXEC_ENCLS_EXITING		VMCS_CONTROL_BIT(ENCLS_EXITING)
 #define SECONDARY_EXEC_RDSEED_EXITING		VMCS_CONTROL_BIT(RDSEED_EXITING)
 #define SECONDARY_EXEC_ENABLE_PML               VMCS_CONTROL_BIT(PAGE_MOD_LOGGING)
+#define SECONDARY_EXEC_EPT_VIOLATION_VE		VMCS_CONTROL_BIT(EPT_VIOLATION_VE)
 #define SECONDARY_EXEC_PT_CONCEAL_VMX		VMCS_CONTROL_BIT(PT_CONCEAL_VMX)
 #define SECONDARY_EXEC_ENABLE_XSAVES		VMCS_CONTROL_BIT(XSAVES)
 #define SECONDARY_EXEC_MODE_BASED_EPT_EXEC	VMCS_CONTROL_BIT(MODE_BASED_EPT_EXEC)
@@ -226,6 +227,8 @@ enum vmcs_field {
 	VMREAD_BITMAP_HIGH              = 0x00002027,
 	VMWRITE_BITMAP                  = 0x00002028,
 	VMWRITE_BITMAP_HIGH             = 0x00002029,
+	VE_INFORMATION_ADDRESS		= 0x0000202A,
+	VE_INFORMATION_ADDRESS_HIGH	= 0x0000202B,
 	XSS_EXIT_BITMAP                 = 0x0000202C,
 	XSS_EXIT_BITMAP_HIGH            = 0x0000202D,
 	ENCLS_EXITING_BITMAP		= 0x0000202E,
@@ -631,4 +634,13 @@ enum vmx_l1d_flush_state {
 
 extern enum vmx_l1d_flush_state l1tf_vmx_mitigation;
 
+struct vmx_ve_information {
+	u32 exit_reason;
+	u32 delivery;
+	u64 exit_qualification;
+	u64 guest_linear_address;
+	u64 guest_physical_address;
+	u16 eptp_index;
+};
+
 #endif
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 6780313914f8..d780eee9b697 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6408,6 +6408,10 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
 	if (secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID)
 		pr_err("Virtual processor ID = 0x%04x\n",
 		       vmcs_read16(VIRTUAL_PROCESSOR_ID));
+	if (secondary_exec_control & SECONDARY_EXEC_EPT_VIOLATION_VE) {
+		pr_err("VE info address = 0x%016llx\n",
+		       vmcs_read64(VE_INFORMATION_ADDRESS));
+	}
 }
 
 /*
-- 
2.43.0