linux-kernel - [PATCH 3/4] x86/sgx: Define error codes for ENCLS[EUPDATESVN]

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Message-ID: <20250321123938.802763-4-elena.reshetova@intel.com>
Date: Fri, 21 Mar 2025 14:34:42 +0200
From: Elena Reshetova <elena.reshetova@...el.com>
To: dave.hansen@...el.com
Cc: jarkko@...nel.org,
	linux-sgx@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	x86@...nel.org,
	asit.k.mallick@...el.com,
	vincent.r.scarlata@...el.com,
	chongc@...gle.com,
	erdemaktas@...gle.com,
	vannapurve@...gle.com,
	dionnaglaze@...gle.com,
	bondarn@...gle.com,
	scott.raynor@...el.com,
	Elena Reshetova <elena.reshetova@...el.com>,
	Cathy Zhang <cathy.zhang@...el.com>
Subject: [PATCH 3/4] 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.

Code is from previous submission in https://lore.kernel.org/all/20220520103904.1216-1-cathy.zhang@intel.com/T/#m1becf67078dc8c59d454e2e6c6d67ca64db341a4

Co-developed-by: Cathy Zhang <cathy.zhang@...el.com>
Signed-off-by: Cathy Zhang <cathy.zhang@...el.com>
Co-developed-by: Elena Reshetova <elena.reshetova@...el.com>
Signed-off-by: Elena Reshetova <elena.reshetova@...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 6a0069761508..8ba39bbf4e91 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,
 };
 
-- 
2.45.2