ACPI FADT HW register interface fields are
optional but current UPL common entry code made it
as mandatory which caused compatibility issue on
some platforms.
Solution is to move those FADT HW register fields
check code to consumer code so only ASSERT when
those fields are consumed with error.
Currently only AcpiTimerLib and ResetSystemLib
consuming those register fields so if platforms
configured UPL to different library instances the
FADT HW register fields are not consumed thus will
not cause ASSERT.
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
DT has a way to provide reserved images in a simpler tabular
manner. UPL should be able to support that.
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
In order to properly enable multisegment RB, we need
to grab ecam data from the FDT for each bridge.
Current UNIVERSAL_PAYLOAD_PCI_ROOT_BRIDGES struct from
MdeModulePkg does not include definition for ecam. In
order to maintain backward compatibility and also avoid
diverging too much from core, we are going to define a
new HOB for UPL segment information and pass it to
GetPciSegmentInfo function. Ths function then grabs specifically
ecam info from the segment hob along with other rb specific
information to create final RB info required by multi segment
PCI driver.
Additionally we would like to support legacy implementations which
rely on ACPIBoard HOB to fill up segment info. So if UplSegmentInfo Hob
is not found we try and look for other hob.
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
We need to let UEFI know that there are cetain memory types
which are special purpose (CXL/HBM) etc and we may want to
avoid using them for UEFI purposes. Hence UPL needs to know
about such memory types.
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
Option node provides info that is to be consumed by during
metadata creation for other nodes like root bridge; pci-enum-done
etc. Handle that dependency by storing option values in a variable
and then apply it during post processing. Ideally such cross node
dependency should be avoided in design. Scope for futher improvements.
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
The IMD entry uses the 32bit start field as relative offset
to root. On Ia32X64 this works fine as UINTN is also 32 bit and
negative relative offsets are properly calculated due to an
integer overflow.
On X64 this doesn't work as UINTN is 64 bit and the offset
is no longer subtracted, but it's added to the root. Fix that
by sign extending the start field to 64 bit.
Test: Booting UefiPayloadPkg still works on Ia32X64 and now also
works on X64.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4166
Fix integer overflow in various CreateHob instances.
Fixes: CVE-2022-36765
The CreateHob() function aligns the requested size to 8
performing the following operation:
```
HobLength = (UINT16)((HobLength + 0x7) & (~0x7));
```
No checks are performed to ensure this value doesn't
overflow, and could lead to CreateHob() returning a smaller
HOB than requested, which could lead to OOB HOB accesses.
Reported-by: Marc Beatove <mbeatove@google.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Cc: John Mathew <john.mathews@intel.com>
Authored-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Gua Guo <gua.guo@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4347
To put UiApp.inf and BootManagerMenuApp.inf to proper FV(BDSFV)
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: MarsX Lin <marsx.lin@intel.com>
After moving BDS driver to a new FV for universal UEFI payload,
the shell boot option path is not correct since it used the BDS
FV instead of DXE FV in its device path.
This patch would find the correct FV by reading shell file.
It also removed PcdShellFile by using gUefiShellFileGuid.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Cc: Gua Guo <gua.guo@intel.com>
Reviewed-by: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Reviewed-by: Mike Maslenkin <mike.maslenkin@gmail.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4427
1. Since UART speed is slower than CPU, BIOS need to check the write
buffer is empty, to avoid overwrite the buffer content.
2. LPSS UART might disable MMIO space for Windows debug usage during
ExitBootServices event. BIOS need to avoid access the MMIO space
after ExitBootServices.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: PaytonX Hsieh <paytonx.hsieh@intel.com>
__FUNCTION__ is a pre-standard extension that gcc and Visual C++ among
others support, while __func__ was standardized in C99.
Since it's more standard, replace __FUNCTION__ with __func__ throughout
UefiPayloadPkg.
Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Reviewed-by: James Lu <james.lu@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4241
Since UefiPayloadPkg had supported multiple firmware volume,
remove the platform specific logic via protocol
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: Gua Guo <gua.guo@intel.com>
Reviewed-by: James Lu <james.lu@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: MarsX Lin <marsx.lin@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4264
Fix debug print error level hob not save correct DebugPrintErrorlevel
Should cover the case:
Header.Length == UNIVERSAL_PAYLOAD_SIZEOF_THROUGH_FIELD ()
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Cc: Gua Guo <gua.guo@intel.com>
Signed-off-by: Ning Feng <ning.feng@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Add condition to return success if mUartCount is greater
than zero in SerialPortInitialize() to avoid filling mUartInfo
with the same hob data when SerialPortInitialize() is called
multiple times. Also add proper conditions in SerialPortRead
function to read the data properly from multiple UART's.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: Kavya <k.kavyax.sravanthi@intel.com>
Add new Serial port library instance that consumes the HOB defined
in MdeModulePkg/Include/UniversalPayload/SerialPortInfo.h to support
multiple UART's.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: Kavya <k.kavyax.sravanthi@intel.com>
Return PciRootBridges instead of NULL and set
PcdPciDisableBusEnumeration to FALSE when
root bridge count is zero.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: Kavya <k.kavyax.sravanthi@intel.com>
Add a macro called BOOTSPLASH_IMAGE, which when enabled, will
display a logo at boot time.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Writes TianoCore debug logs into the CBMEM console ringbuffer, from
where the user can retrieve them with the `cbmem` userspace utility.
The intention is to aid in debugging non-fatal issues even in release
builds, or simply make TianoCore's logs available to those interested.
Consequently, MDEPKG_NDEBUG must be masked. As an in-memory debug
logging library, ASSERTs must be non-fatal to be seen, so they neither
dead-loop nor create a breakpoint. It is assumed that ASSERT() neither
enforces fatal conditions nor security integrity, as release builds do
not call DebugAssert() from the ASSERT macro.
More detailed debug logs are produced with the DEBUG_CODE macro, but
this guards other debug-related code throughout the codebase. To avoid
changing behaviour on release builds, this is only set for debug builds.
Tested on QEMU, dumping the appropriate memory region in the UEFI shell
shows the TianoCore log. An improved revision of the debug library used
in several coreboot-related EDK2 forks, including MrChromebox's.
Previous revisions also tested on an Acer Aspire VN7-572G laptop.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
Add 4 spaces before the boot prompt "F2 or Down..." so that the
spacing is equadistant from the top, which is spaced with a `\n`,
and the left.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Some ConIn or ConOut device may not in the first root bridge, so connect all
root bridge before detect ConIn and ConOut device.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
Current code follow some rules to check if the PCI device connected to a
serial port device, but some platform or hardware doesn't follow such rule.
By locating gEfiSerialIoProtocolGuid protocol, we can find the related
device path.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
A little overdesign about VisitAllPciInstances function, since there are
two call back functions. Simplify the code logic by combining the two call
back functions, and unused parameters.
Change the PROTOCOL_INSTANCE_CALLBACK to SIMPLE_PROTOCOL_INSTANCE_CALLBACK
because the former is also defined in OvmfPkg. Rename it to avoid confusion.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
Don't assume a 64bit register always holds an address greater than 4GB.
Check the value in the register and decide which Aperature it should be
assigned to.
Fixes assertion
"ASSERT [PciHostBridgeDxe] Bridge->MemAbove4G.Base >= 0x0000000100000000ULL".
Tested with coreboot as bootloader on platforms that have PCI resource
above 4GiB and on platforms that don't have resource above 4GiB.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Guo Dong <guo.dong@intel.com>
It consumes the HOB defined in
UefiPayloadPkg/Include/Guid/DebugPrintErrorLevel.h, and allow bootloader
to config DebugPrintErrorLevel.
Cc: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
This fixes an issue where the framebuffer provided by coreboot or
slimbootloader will only work on the primary VGA device. If the
framebuffer corresponds to a different device the screen will stay black.
In addition, the code doesn't work for multiple graphic cards, has
reference to non existing functions, and is a duplication of common code.
Call EfiBootManagerConnectVideoController on every display device found,
not only the legacy VGA device. This is the same as OvmfPkg does.
Allows to display output on the framebuffer set up by firmware, which might
not be the VGA device.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
On modern platforms with TBT devices the coreboot resource allocator
opens large PCI bridge MMIO windows above 4GiB to place hotplugable
PCI BARs there as they won't fit below 4GiB. In addition modern
GPGPU devices have very big PCI bars that doesn't fit below 4GiB.
The PciHostBridgeLib made lots of assumptions about the coreboot
resource allocator that were not verified at runtime and are no
longer true.
Remove all of the 'coreboot specific' code and implement the same
logic as OvmfPkg's ScanForRootBridges.
Fixes assertion
"ASSERT [PciHostBridgeDxe] Bridge->Mem.Limit < 0x0000000100000000ULL".
Tested with coreboot as bootloader on platforms that have PCI resources
above 4GiB and on platforms that don't have resources above 4GiB.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Provide a build option to use [Esc] instead of [F2] for devices
such as Chromebooks that don't have F-keys.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Ray Ni <ray.ni@Intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
The library PciSegmentInfoLibAcpiBoardInfo consumes the Guid gUefiAcpiBoardInfoGuid.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737
Apply uncrustify changes to .c/.h files in the UefiPayloadPkg package
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3760
Update all use of ', OPTIONAL' to ' OPTIONAL,' for function params.
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
SystemTableInfo GUID is not a Spec defined GUID.
The latest SBL and CBL produces ACPI and SMBIOS table information.
So removing the SystemTableInfo GUID implementation.
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: Thiyagu Kesavan Balakrishnan <thiyagux.kesavan.balakrishnan@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
This library provides FlashDeviceLib APIs based on
SpiFlashLib and consumed by FVB driver.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Benjamin You <benjamin.you@intel.com>
This is a common SPI Flash library used for the Intel platform that
supports SPI hardware sequence. This library provides actual SPI flash
operation via Intel PCH SPI controller.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Benjamin You <benjamin.you@intel.com>
V2: Fix more header files on #ifdef variable
ECC reported some issues on UefiPayloadPkg, this patch fixed
most of them except several files including ElfLib\Elf32.h,
coreboot.h, CbParseLib.c, etc.
It also removed unused functions in ResetSystemLib and Hob.c.
Signed-off-by: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Fixes simple typo, no behavioral change.
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Moritz Fischer <moritzf@google.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
V2: Fix GCC build issue.
There is typo in previous change caused coreboot build failure.
This patch fixed the build issue.
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Current UefiPayloadPkg can suport PCI root bridge info HOB
provided by bootloader. For UniversalPayload, bootloader can
directly provide this HOB for payload consumption. However,
for legacy UEFI payload, it is required to migrate the HOB
information from bootloader HOB space to UEFI payload HOB
space. This patch added the missing part for the bootloader
ParseLib in order to support both legacy and universal UEFI
payload.
This patch was tested on Slim Bootloader with latest UEFI
payload, and it worked as expected.
Cc: Ray Ni <ray.ni@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Remove asm code used for payload entry.
Use patchable PCD instead a fixed PCD PcdPayloadStackTop to avoid
potential conflict.
Based on the removal, use same HobLib regardless UNIVERSAL_PAYLOAD.
Use same PlatformHookLib regardless UNIVERSAL_PAYLOAD. The original
PlatformHookLib was removed and UniversalPayloadPlatformHookLib was
rename to new PlatformHookLib.
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
The Library constructor is only used for library dependency.
So use a dummy function to make it clear instead of using an
actual function.
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Signed-off-by: Guo Dong <guo.dong@intel.com>
V1: Add quotes when using $(ARCH) in .dsc and .fdf file.
The quotes are added due to the way by which Core ci parse the .dsc file.
Add UINTN in Hob.c to fix cast from pointer to integer of different size error.
V2: Delete lines which reference ShellBinPkg.The pkg doesn't exist in edk2.
Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: DunTan <dun.tan@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Define some PCDs as DynamicEX PCD to be used as global variable.
Because PcdUartDefaultBaudRate is defined as DynamicEX, remove the code
to set it in platformlib. That code was actually redundant.
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
Consume the BootManagerMenuFile HOB in PlatformBootManagerLib
This Lib is in UefiPayloadPkg
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: DunTan <dun.tan@intel.com>
Update the function defination of HobConstructor to align the Phit Hob
structure.
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>