Merge sgx2 into master

Signed-off-by: Huang, Haitao <[email protected]>

Author: haitaohuang

Makefile

@@ -5,14 +5,15 @@ ifneq ($(KERNELRELEASE),)
 		sgx_ioctl.o \
 		sgx_vma.o \
 		sgx_util.o\
-		sgx_encl.o
+		sgx_encl.o \
+		sgx_encl2.o
 	obj-m += isgx.o
 else
 KDIR := /lib/modules/$(shell uname -r)/build
 PWD  := $(shell pwd)
 
 default:
-	$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
+	$(MAKE) -C $(KDIR) M=$(PWD) modules
 
 install: default
 	$(MAKE) INSTALL_MOD_DIR=kernel/drivers/intel/sgx -C $(KDIR) M=$(PWD) modules_install

README.md

@@ -44,7 +44,10 @@ Build and Install the Intel(R) SGX Driver
 - Ensure that you have the following required operating systems:  
   * Ubuntu* 16.04.3 LTS Desktop 64bits
   * Ubuntu* 16.04.3 LTS Server 64bits
+  * Ubuntu* 18.04 LTS Desktop 64bits
+  * Ubuntu* 18.04 LTS Server 64bits
   * Red Hat Enterprise Linux Server release 7.4 64bits
+  * Red Hat Enterprise Linux Server release 8.0 64bits
   * CentOS 7.4.1708 64bits
   * SUSE Linux Enterprise Server 12 64bits
 - Ensure that you have the following required hardware:  
@@ -74,6 +77,10 @@ Build and Install the Intel(R) SGX Driver
         $ sudo yum install kernel
         $ sudo reboot
         ```
+     * On RHEL 8.0 elfutils-libelf-devel package is required:
+        ```
+        $ sudo yum install elfutils-libelf-devel
+        ```
 
 
 **Note:** Refer to the *"Intel® SGX Resource Enumeration Leaves"* section in the [Intel SGX Programming reference guide](https://software.intel.com/en-us/articles/intel-sdm) to make sure your cpu has the SGX feature.