initial release

.gitignore

@@ -0,0 +1 @@
+*.efi

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Takahiro Shinagawa (The University of Tokyo)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -0,0 +1,52 @@
+CC = x86_64-w64-mingw32-gcc
+CFLAGS = -std=gnu11 -ffreestanding -shared -nostdlib -Wall -Werror \
+	 -fno-stack-check -fno-stack-protector \
+	 -mno-stack-arg-probe -mno-red-zone -mno-sse -mno-ms-bitfields \
+         -Wl,--subsystem,10 \
+         -e EfiMain \
+         -O6
+
+QEMU = qemu-system-x86_64
+QEMU_DISK = 'json:{ "fat-type": 0, "dir": "image", "driver": "vvfat", "floppy": false, "rw": true }'
+QEMU_OPTS =-nodefaults -machine accel=kvm -cpu host -m 128 -bios OVMF.fd -hda $(QEMU_DISK) -nographic -serial mon:stdio -no-reboot
+
+NESTED=$(shell cat /sys/module/kvm_intel/parameters/nested)
+ifeq ($(NESTED),N)
+	ENABLE_NESTED=enable_nested
+else
+	ENABLE_NESTED=
+endif
+
+%.efi: %.c
+	$(CC) $(CFLAGS) $< -o $@
+
+.PHONY: all enable_nested disable_nested qemu clean
+
+
+all: main.efi
+
+qemu: OVMF.fd image/EFI/BOOT/BOOTX64.EFI $(ENABLE_NESTED)
+	$(QEMU) $(QEMU_OPTS)
+
+OVMF.fd:
+	wget http://downloads.sourceforge.net/project/edk2/OVMF/OVMF-X64-r15214.zip
+	unzip OVMF-X64-r15214.zip OVMF.fd
+	rm OVMF-X64-r15214.zip
+
+image/EFI/BOOT/BOOTX64.EFI: main.efi
+	mkdir -p image/EFI/BOOT
+	ln -sf ../../../main.efi image/EFI/BOOT/BOOTX64.EFI
+
+enable_nested:
+	@echo Enabling nested virtualization in KVM ...
+	sudo modprobe -r kvm_intel;
+	sudo modprobe kvm_intel nested=1;
+
+disable_nested:
+	@echo Disabling nested virtualization in KVM ...
+	sudo modprobe -r kvm_intel;
+	sudo modprobe kvm_intel nested=0;
+
+clean:
+	rm -f main.efi OVMF.fd
+	rm -rf image

README.md

@@ -0,0 +1,64 @@
+# The VMX benchmark (VMXbench)
+
+VMXbench is a benchmark program written as a UEFI application that measures the number of cycles involved in a VM entry/exit. It currently supports Intel VT-x processors that have the Virtual Machine Extensions (VMX) capability.
+
+## Description
+
+VMXbench measures the number of cycles in a VM exit and entry ten times after warming up, and print the min/max/avg cycles to the console. It is useful for measuring the bare-metal hardware performance of the virtualization technology in different generation processors. It also helps learn the basic usage of Intel VT-x and how to make a UEFI application.
+
+## Sample Output
+
+```
+Starting VMXbench ...
+VMX is supported
+Enable VMX
+Enable VMX operation
+Enter VMX operation
+Initialize VMCS
+Launch a VM
+VM exit[0]:   330, VM entry[0]:   300
+VM exit[1]:   330, VM entry[1]:   294
+VM exit[2]:   332, VM entry[2]:   292
+VM exit[3]:   330, VM entry[3]:   293
+VM exit[4]:   330, VM entry[4]:   296
+VM exit[5]:   330, VM entry[5]:   298
+VM exit[6]:   326, VM entry[6]:   296
+VM exit[7]:   330, VM entry[7]:   293
+VM exit[8]:   332, VM entry[8]:   290
+VM exit[9]:   332, VM entry[9]:   292
+VM exit : min =   326, max =   332, avg =   330
+VM entry: min =   290, max =   330, avg =   294
+Press any key to go back to the UEFI menu
+```
+
+## Build
+
+You first need to install the mingw cross compiler.
+
+Ubuntu: `sudo apt-get install gcc-mingw-w64`
+
+Fedora: `sudo dnf install mingw64-gcc`
+
+CentOS: `sudo yum install mingw64-gcc`
+
+If you use a distribution other than the above, find a 64bit mingw cross compiler, and set its name to "CC" in the Makefile.
+
+Then, type the following command.
+
+`make`
+
+## Test-Run
+
+Typing the following command will run VMXbench on QEMU.
+
+`make qemu`
+
+This will download a UEFI firmware (OVMF-X64-r15214.zip). If you can't download it, find the latest version from http://tianocore.sourceforge.net/wiki/OVMF or in your distribution.
+
+## Run
+
+Copy main.efi into a USB frash drive as \EFI\BOOT\BOOTX64.EFI and boot from the drive. You may need to change the boot order at the boot menu.
+
+## Licence
+
+[The MIT License](http://opensource.org/licenses/MIT)