Hi Jarkko,
On 4/14/2022 4:21 AM, Jarkko Sakkinen wrote:
On Wed, 2022-04-13 at 14:10 -0700, Reinette Chatre wrote:
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
No changes since V3.
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..10287c558485 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_type + sgx_ioc_enclave_remove_pages
Enclave vDSO ------------
Reviewed-by: Jarkko Sakkinen jarkko@kernel.org
Thank you.
Reinette