x86/sgx: Initialize virtual EPC driver even when SGX driver is disabled

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Modify sgx_init() to always try to initialize the virtual EPC driver,
even if the SGX driver is disabled.  The SGX driver might be disabled
if SGX Launch Control is in locked mode, or not supported in the
hardware at all.  This allows (non-Linux) guests that support non-LC
configurations to use SGX.

 [ bp: De-silli-fy the test. ]

Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Link: https://lkml.kernel.org/r/d35d17a02bbf8feef83a536cec8b43746d4ea557.1616136308.git.kai.huang@intel.com

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Kai Huang 2021-03-19 20:23:02 +13:00 • committed by Borislav Petkov

parent 332bfc7bec

commit faa7d3e6f3

1 changed files with 10 additions and 1 deletions

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arch/x86/kernel/cpu/sgx/main.c

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