mainline inclusion
from mainline-5.13
commit b8921dcc
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5EZEK
CVE: NA

Intel-SIG: commit b8921dcc x86/cpufeatures: Add SGX1 and SGX2 sub-features.
Backport for SGX virtualization support

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

Add SGX1 and SGX2 feature flags, via CPUID.0x12.0x0.EAX, as scattered
features, since adding a new leaf for only two bits would be wasteful.
As part of virtualizing SGX, KVM will expose the SGX CPUID leafs to its
guest, and to do so correctly needs to query hardware and kernel support
for SGX1 and SGX2.

Suppress both SGX1 and SGX2 from /proc/cpuinfo. SGX1 basically means
SGX, and for SGX2 there is no concrete use case of using it in
/proc/cpuinfo.
Signed-off-by: NSean Christopherson <seanjc@google.com>
Signed-off-by: NKai Huang <kai.huang@intel.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Acked-by: NDave Hansen <dave.hansen@intel.com>
Acked-by: NJarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/d787827dbfca6b3210ac3e432e3ac1202727e786.1616136308.git.kai.huang@intel.comSigned-off-by: NFan Du <fan.du@intel.com>
Signed-off-by: NZhiquan Li <zhiquan1.li@intel.com>