x86/sgx: Rename sgx_encl_ewb_cpumask() as sgx_encl_cpumask()

mainline inclusion
from mainline-6.0-rc1
commit bdaa8799
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5USAM


CVE: NA

Intel-SIG: commit bdaa8799 x86/sgx: Rename sgx_encl_ewb_cpumask() as
sgx_encl_cpumask().
Backport for SGX EDMM support.

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

sgx_encl_ewb_cpumask() is no longer unique to the reclaimer where it
is used during the EWB ENCLS leaf function when EPC pages are written
out to main memory and sgx_encl_ewb_cpumask() is used to learn which
CPUs might have executed the enclave to ensure that TLBs are cleared.

Upcoming SGX2 enabling will use sgx_encl_ewb_cpumask() during the
EMODPR and EMODT ENCLS leaf functions that make changes to enclave
pages. The function is needed for the same reason it is used now: to
learn which CPUs might have executed the enclave to ensure that TLBs
no longer point to the changed pages.

Rename sgx_encl_ewb_cpumask() to sgx_encl_cpumask() to reflect the
broader usage.

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/d4d08c449450a13d8dd3bb6c2b1af03895586d4f.1652137848.git.reinette.chatre@intel.com


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