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.
Reviewed-by: Jarkko Sakkinen jarkko@kernel.org Signed-off-by: Reinette Chatre reinette.chatre@intel.com --- Changes since V4: - Rename sgx_ioc_enclave_modify_type -> sgx_ioc_enclave_modify_types. (Jarkko) - Add Jarkko's Reviewed-by tag.
Changes since V2: - Remove references to ioctl() to relax permissions and update to reflect function renaming sgx_ioc_enclave_restrict_perm() -> sgx_ioc_enclave_restrict_permissions(). - Rename sgx_ioc_enclave_modt -> sgx_ioc_enclave_modify_type
Changes since V1: - New patch.
Documentation/x86/sgx.rst | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
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 ------------