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Reinette Chatre 7f391752d4 x86/sgx: Export sgx_encl_ewb_cpumask()

Using sgx_encl_ewb_cpumask() to learn which CPUs might have executed
an enclave is useful to ensure that TLBs are cleared when changes are
made to enclave pages.

sgx_encl_ewb_cpumask() is used within the reclaimer when an enclave
page is evicted. The upcoming SGX2 support enables changes to be
made to enclave pages and will require TLBs to not refer to the
changed pages and thus will be needing sgx_encl_ewb_cpumask().

Relocate sgx_encl_ewb_cpumask() to be with the rest of the enclave
code in encl.c now that it is no longer unique to the reclaimer.

Take care to ensure that any future usage maintains the
current context requirement that ETRACK has been called first.
Expand the existing comments to highlight this while moving them
to a more prominent location before the function.

No functional change.

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/05b60747fd45130cf9fc6edb1c373a69a18a22c5.1652137848.git.reinette.chatre@intel.com

2022-07-07 10:13:01 -07:00

alpha

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2022-04-01 19:57:03 -07:00

arc

ARC: remove redundant READ_ONCE() in cmpxchg loop

2022-04-18 14:47:05 -07:00

arm

hotfixes for 5.18-rc7

2022-05-13 10:22:37 -07:00

arm64

hotfixes for 5.18-rc7