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authorReinette Chatre <reinette.chatre@intel.com>2022-05-10 21:08:57 +0300
committerDave Hansen <dave.hansen@linux.intel.com>2022-07-07 20:13:03 +0300
commit629b5155d01b699e50ee63a3973402c64d0ac5d6 (patch)
tree630c041c4132897a2ac9282ea21816cc204186c3 /Documentation/x86
parenta0506b3b063641f0a05b2a4399442a38aad22291 (diff)
downloadlinux-629b5155d01b699e50ee63a3973402c64d0ac5d6.tar.xz
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> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Link: https://lkml.kernel.org/r/1da0b9a938b28e68e6870ebd5291490d680e700b.1652137848.git.reinette.chatre@intel.com
Diffstat (limited to 'Documentation/x86')
-rw-r--r--Documentation/x86/sgx.rst15
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/x86/sgx.rst b/Documentation/x86/sgx.rst
index 265568a9292c..2bcbffacbed5 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
------------