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@xxxxxxxxx> > --- > 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@xxxxxxxxxx> BR, Jarkko
