mainline inclusion
from mainline-5.13
commit 70210c04
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5EZEK
CVE: NA

Intel-SIG: commit 70210c04 KVM: VMX: Add SGX ENCLS[ECREATE] handler
to enforce CPUID restrictions.
Backport for SGX virtualization support

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

Add an ECREATE handler that will be used to intercept ECREATE for the
purpose of enforcing and enclave's MISCSELECT, ATTRIBUTES and XFRM, i.e.
to allow userspace to restrict SGX features via CPUID.  ECREATE will be
intercepted when any of the aforementioned masks diverges from hardware
in order to enforce the desired CPUID model, i.e. inject #GP if the
guest attempts to set a bit that hasn't been enumerated as allowed-1 in
CPUID.

Note, access to the PROVISIONKEY is not yet supported.
Signed-off-by: NSean Christopherson <sean.j.christopherson@intel.com>
Co-developed-by: NKai Huang <kai.huang@intel.com>
Signed-off-by: NKai Huang <kai.huang@intel.com>
Message-Id: <c3a97684f1b71b4f4626a1fc3879472a95651725.1618196135.git.kai.huang@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NFan Du <fan.du@intel.com>
Signed-off-by: NZhiquan Li <zhiquan1.li@intel.com>