Commit be7e0837 authored May 10, 2022 by Reinette Chatre Committed by Zhiquan Li Oct 10, 2022

Documentation/x86: Introduce enclave runtime management section

mainline inclusion
from mainline-6.0-rc1
commit 629b5155
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5USAM


CVE: NA

Intel-SIG: commit 629b5155 Documentation/x86: Introduce enclave
runtime management section.
Backport for SGX EDMM support.

--------------------------------

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


Signed-off-by: Zhiquan Li <zhiquan1.li@intel.com>

parent 1124e6cb

Documentation/x86/sgx.rst

+15 −0

Original line number	Diff line number	Diff line
		@@ -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
		------------