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From 20acb57bc235f289b2d083a408d134a0db676ed1 Mon Sep 17 00:00:00 2001
From: Reinette Chatre <reinette.chatre@intel.com>
Date: Mon, 7 Feb 2022 16:45:46 -0800
Subject: [PATCH 24/34] Documentation/x86: Introduce enclave runtime management
section
Enclave runtime management is introduced following the pattern
of the section describing enclave building. Provide a brief
summary of enclave runtime management, pointing to the functions
implementing the ioctl()s that will contain details within their
kernel-doc.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
Documentation/x86/sgx.rst | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/Documentation/x86/sgx.rst b/Documentation/x86/sgx.rst
index 9df620b59f83..4059efbb4d2e 100644
--- a/Documentation/x86/sgx.rst
+++ b/Documentation/x86/sgx.rst
@@ -138,6 +138,22 @@ pages and establish enclave page permissions.
sgx_ioc_enclave_init
sgx_ioc_enclave_provision
+Enclave runtime management
+--------------------------
+
+Systems supporting SGX2 additionally support changes to initialized
+enclaves: modifying enclave page permissions and type, and dynamically
+adding and removing of enclave pages. When an enclave accesses an address
+within its address range that does not have a backing page then a new
+regular page will be dynamically added to the enclave. The enclave is
+still required to run EACCEPT on the new page before it can be used.
+
+.. kernel-doc:: arch/x86/kernel/cpu/sgx/ioctl.c
+ :functions: sgx_ioc_enclave_relax_perm
+ sgx_ioc_enclave_restrict_perm
+ sgx_ioc_enclave_modt
+ sgx_ioc_enclave_remove_pages
+
Enclave vDSO
------------
--
2.35.1
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