linux-kernel - [RFC PATCH v2 07/10] x86/sgx: Define error codes for ENCLS[EUPDATESVN]

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Date:   Tue, 15 Mar 2022 09:02:57 +0800
From:   Cathy Zhang <cathy.zhang@...el.com>
To:     linux-sgx@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     dave.hansen@...el.com, ashok.raj@...el.com, cathy.zhang@...el.com
Subject: [RFC PATCH v2 07/10] x86/sgx: Define error codes for ENCLS[EUPDATESVN]

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@...el.com>
---
 arch/x86/include/asm/sgx.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/x86/include/asm/sgx.h b/arch/x86/include/asm/sgx.h
index eae20fa52b93..6aa36c1be426 100644
--- a/arch/x86/include/asm/sgx.h
+++ b/arch/x86/include/asm/sgx.h
@@ -73,6 +73,11 @@ enum sgx_encls_function {
  *				public key does not match IA32_SGXLEPUBKEYHASH.
  * %SGX_PAGE_NOT_MODIFIABLE:	The EPC page cannot be modified because it
  *				is in the PENDING or MODIFIED state.
+ * %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 {
@@ -81,6 +86,9 @@ enum sgx_return_code {
 	SGX_CHILD_PRESENT		= 13,
 	SGX_INVALID_EINITTOKEN		= 16,
 	SGX_PAGE_NOT_MODIFIABLE		= 20,
+	SGX_INSUFFICIENT_ENTROPY	= 29,
+	SGX_EPC_NOT_READY		= 30,
+	SGX_NO_UPDATE			= 31,
 	SGX_UNMASKED_EVENT		= 128,
 };
 
-- 
2.17.1