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Date: Thu, 07 Jul 2022 18:27:38 -0000
From: "tip-bot2 for Reinette Chatre" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Reinette Chatre <reinette.chatre@...el.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Jarkko Sakkinen <jarkko@...nel.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/sgx] Documentation/x86: Introduce enclave runtime
management section
The following commit has been merged into the x86/sgx branch of tip:
Commit-ID: 629b5155d01b699e50ee63a3973402c64d0ac5d6
Gitweb: https://git.kernel.org/tip/629b5155d01b699e50ee63a3973402c64d0ac5d6
Author: Reinette Chatre <reinette.chatre@...el.com>
AuthorDate: Tue, 10 May 2022 11:08:57 -07:00
Committer: Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Thu, 07 Jul 2022 10:13:03 -07:00
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@...el.com>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
Link: https://lkml.kernel.org/r/1da0b9a938b28e68e6870ebd5291490d680e700b.1652137848.git.reinette.chatre@intel.com
---
Documentation/x86/sgx.rst | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/Documentation/x86/sgx.rst b/Documentation/x86/sgx.rst
index 265568a..2bcbffa 100644
--- a/Documentation/x86/sgx.rst
+++ b/Documentation/x86/sgx.rst
@@ -100,6 +100,21 @@ 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_restrict_permissions
+ sgx_ioc_enclave_modify_types
+ sgx_ioc_enclave_remove_pages
+
Enclave vDSO
------------
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