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ENCLS is the userspace instruction which wraps virtually all
unprivileged SGX functionality for managing enclaves. It is essentially
the ioctl() of instructions with each function implementing different
SGX-related functionality.
Add macros to wrap the ENCLS functionality. There are two main groups,
one for functions which do not return error codes and a “ret_” set for
those that do.
ENCLS functions are documented in Intel SDM section 36.6.
Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Jethro Beekman <jethro@fortanix.com>
Link: https://lkml.kernel.org/r/20201112220135.165028-3-jarkko@kernel.org
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