[RFC PATCH v3 07/10] x86/sgx: Define error codes for ENCLS[EUPDATESVN]

[Cathy Zhang <cathy.zhang@intel.com>]

Add error codes for ENCLS[EUPDATESVN], then SGX CPUSVN update
process can know the execution state of EUPDATESVN and notify
userspace.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
---
 arch/x86/include/asm/sgx.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/include/asm/sgx.h b/arch/x86/include/asm/sgx.h
index 03ec7e32659c..4a8ca7281229 100644
--- a/arch/x86/include/asm/sgx.h
+++ b/arch/x86/include/asm/sgx.h
@@ -65,17 +65,27 @@ enum sgx_encls_function {
 
 /**
  * enum sgx_return_code - The return code type for ENCLS, ENCLU and ENCLV
+ * %SGX_EPC_PAGE_CONFLICT	Page is being written by other ENCLS function.
  * %SGX_NOT_TRACKED:		Previous ETRACK's shootdown sequence has not
  *				been completed yet.
  * %SGX_CHILD_PRESENT		SECS has child pages present in the EPC.
  * %SGX_INVALID_EINITTOKEN:	EINITTOKEN is invalid and enclave signer's
  *				public key does not match IA32_SGXLEPUBKEYHASH.
+ * %SGX_INSUFFICIENT_ENTROPY:	Insufficient entropy in RNG.
+ * %SGX_EPC_NOT_READY:		EPC is not ready for SVN update.
+ * %SGX_NO_UPDATE:		EUPDATESVN was successful, but CPUSVN was not
+ *				updated because current SVN was not newer than
+ *				CPUSVN.
  * %SGX_UNMASKED_EVENT:		An unmasked event, e.g. INTR, was received
  */
 enum sgx_return_code {
+	SGX_EPC_PAGE_CONFLICT		= 7,
 	SGX_NOT_TRACKED			= 11,
 	SGX_CHILD_PRESENT		= 13,
 	SGX_INVALID_EINITTOKEN		= 16,
+	SGX_INSUFFICIENT_ENTROPY	= 29,
+	SGX_EPC_NOT_READY		= 30,
+	SGX_NO_UPDATE			= 31,
 	SGX_UNMASKED_EVENT		= 128,
 };
 
-- 
2.17.1