linux-kernel - [PATCH 1/2] KVM: vmx: Add defines for SGX ENCLS exiting

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Date:   Tue, 14 Aug 2018 08:53:11 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     linux-kernel@...r.kernel.org
Cc:     sean.j.christopherson@...el.com
Subject: [PATCH 1/2] KVM: vmx: Add defines for SGX ENCLS exiting

Hardware support for basic SGX virtualization adds a new execution
control (ENCLS_EXITING), VMCS field (ENCLS_EXITING_BITMAP) and exit
reason (ENCLS), that enables a VMM to intercept specific ENCLS leaf
functions, e.g. to inject faults when the VMM isn't exposing SGX to
a VM.  When ENCLS_EXITING is enabled, the VMM can set/clear bits in
the bitmap to intercept/allow ENCLS leaf functions in non-root, e.g.
setting bit 2 in the ENCLS_EXITING_BITMAP will cause ENCLS[EINIT]
to VMExit(ENCLS).

Note: EXIT_REASON_ENCLS was previously added by commit 1f5199927034
("KVM: VMX: add missing exit reasons").

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/include/asm/vmx.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 6aa8499e1f62..2665c10ece4c 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -74,6 +74,7 @@
 #define SECONDARY_EXEC_ENABLE_INVPCID		0x00001000
 #define SECONDARY_EXEC_ENABLE_VMFUNC            0x00002000
 #define SECONDARY_EXEC_SHADOW_VMCS              0x00004000
+#define SECONDARY_EXEC_ENCLS_EXITING		0x00008000
 #define SECONDARY_EXEC_RDSEED_EXITING		0x00010000
 #define SECONDARY_EXEC_ENABLE_PML               0x00020000
 #define SECONDARY_EXEC_XSAVES			0x00100000
@@ -213,6 +214,8 @@ enum vmcs_field {
 	VMWRITE_BITMAP_HIGH             = 0x00002029,
 	XSS_EXIT_BITMAP                 = 0x0000202C,
 	XSS_EXIT_BITMAP_HIGH            = 0x0000202D,
+	ENCLS_EXITING_BITMAP		= 0x0000202E,
+	ENCLS_EXITING_BITMAP_HIGH	= 0x0000202F,
 	TSC_MULTIPLIER                  = 0x00002032,
 	TSC_MULTIPLIER_HIGH             = 0x00002033,
 	GUEST_PHYSICAL_ADDRESS          = 0x00002400,
-- 
2.18.0