[edk2-devel] [PATCH] BaseTools: GenerateCapsule.py: Add support for version 3 of FMP Image Header structure
Michael D Kinney
michael.d.kinney at intel.com
Wed Apr 21 15:34:16 UTC 2021
Sughosh,
My feedback on compatibility was for the parameter list to the Python methods. Not the C structures. The python modules in the Common directory could be used by other tools.
Mike
From: Sughosh Ganu <sughosh.ganu at linaro.org>
Sent: Wednesday, April 21, 2021 12:02 AM
To: Kinney, Michael D <michael.d.kinney at intel.com>
Cc: devel at edk2.groups.io; Feng, Bob C <bob.c.feng at intel.com>; Liming Gao <gaoliming at byosoft.com.cn>; Chen, Christine <yuwei.chen at intel.com>
Subject: Re: [edk2-devel] [PATCH] BaseTools: GenerateCapsule.py: Add support for version 3 of FMP Image Header structure
hi Michael,
Thanks for your review.
On Tue, 20 Apr 2021 at 21:26, Kinney, Michael D <michael.d.kinney at intel.com<mailto:michael.d.kinney at intel.com>> wrote:
Hi,
I think this patch is functional, but there are a few things that can be improved.
1) We should not use of the hard coded constants for the ImageCapsuleSupport values.
The UEFI spec has #defines for these values, and we need to figure out how to add
those define values in the scope of the FMP Capsule Image Header. Perhaps add the
values to FmpCapsuleImageHeaderClass in FmpCapsuleHeader.py:
class FmpCapsuleImageHeaderClass (object):
CAPSULE_SUPPORT_AUTHENTICATION = 0x0000000000000001
CAPSULE_SUPPORT_DEPENDENCY = 0x0000000000000002
From GenerateCapsule.py, you can use these values to set ImageCapsuleSupport.
Value 0 is not defined by the UEFI Spec. Though that appears to be the value used
for a raw payload without authentication or dependency information.
Since GenerateCapsule does not import FmpCapsuleImageHeaderClass, these defines
may have to be added to the FmpCapsuleHeaderClass instead.
Okay. I will make the changes as per your suggestion.
2) The ImageCapsuleSupport parameter is added in the middle of the python function arguments.
Since this is a new field added at the end of the V3 structure, I recommend we add arguments
at the end of the argument list. This will be an optional argument, so any existing use
of these methods for V2 use cases will not be impacted. These python methods can be
potentially used by other consumers, so we should always consider backwards compatibility
when updating BaseTools/Source/Python/Common areas.
I believe that adding support for compatibility with previous versions will be a more involved effort. If you look at the code, the way it is right now, the EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER structure currently supports version 2 -- there is no provision for generating a capsule with version 1 for example. So the way the code is structured right now, we can only support one version. So, if you are looking for having support for previous versions as well, I think that would require adding support for passing the structure version that we need, and then based on. this information, the structure would have certain fields present/absent. Would it be fine to add this field in the structure for now. If you think it necessary, support for multiple versions of the structure can be added as a separate exercise. Is my understanding of your comment correct, or am I missing something.
-sughosh
Thanks,
Mike
> -----Original Message-----
> From: devel at edk2.groups.io<mailto:devel at edk2.groups.io> <devel at edk2.groups.io<mailto:devel at edk2.groups.io>> On Behalf Of Sughosh Ganu
> Sent: Monday, April 19, 2021 4:40 AM
> To: devel at edk2.groups.io<mailto:devel at edk2.groups.io>
> Cc: Feng, Bob C <bob.c.feng at intel.com<mailto:bob.c.feng at intel.com>>; Liming Gao <gaoliming at byosoft.com.cn<mailto:gaoliming at byosoft.com.cn>>; Chen, Christine <yuwei.chen at intel.com<mailto:yuwei.chen at intel.com>>;
> Sughosh Ganu <sughosh.ganu at linaro.org<mailto:sughosh.ganu at linaro.org>>
> Subject: [edk2-devel] [PATCH] BaseTools: GenerateCapsule.py: Add support for version 3 of FMP Image Header structure
>
> Add support for the ImageCapsuleSupport field, introduced in version 3
> of the EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER structure. This
> structure member is used to indicate if the corresponding payload has
> support for authentication and dependency.
>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org<mailto:sughosh.ganu at linaro.org>>
> ---
> .../Source/Python/Capsule/GenerateCapsule.py | 5 +++-
> .../Common/Uefi/Capsule/FmpCapsuleHeader.py | 26 +++++++++++++------
> 2 files changed, 22 insertions(+), 9 deletions(-)
>
> diff --git a/BaseTools/Source/Python/Capsule/GenerateCapsule.py b/BaseTools/Source/Python/Capsule/GenerateCapsule.py
> index a8de988253..6419a2ac6f 100644
> --- a/BaseTools/Source/Python/Capsule/GenerateCapsule.py
> +++ b/BaseTools/Source/Python/Capsule/GenerateCapsule.py
> @@ -561,6 +561,7 @@ if __name__ == '__main__':
> print ('GenerateCapsule: error:' + str(Msg))
> sys.exit (1)
> for SinglePayloadDescriptor in PayloadDescriptorList:
> + ImageCapsuleSupport = 0x0000000000000000
> Result = SinglePayloadDescriptor.Payload
> try:
> FmpPayloadHeader.FwVersion = SinglePayloadDescriptor.FwVersion
> @@ -575,6 +576,7 @@ if __name__ == '__main__':
> if SinglePayloadDescriptor.UseDependency:
> CapsuleDependency.Payload = Result
> CapsuleDependency.DepexExp = SinglePayloadDescriptor.DepexExp
> + ImageCapsuleSupport |= 0x0000000000000002
> Result = CapsuleDependency.Encode ()
> if args.Verbose:
> CapsuleDependency.DumpInfo ()
> @@ -607,13 +609,14 @@ if __name__ == '__main__':
> FmpAuthHeader.MonotonicCount = SinglePayloadDescriptor.MonotonicCount
> FmpAuthHeader.CertData = CertData
> FmpAuthHeader.Payload = Result
> + ImageCapsuleSupport |= 0x0000000000000001
> Result = FmpAuthHeader.Encode ()
> if args.Verbose:
> FmpAuthHeader.DumpInfo ()
> except:
> print ('GenerateCapsule: error: can not encode FMP Auth Header')
> sys.exit (1)
> - FmpCapsuleHeader.AddPayload (SinglePayloadDescriptor.Guid, Result, HardwareInstance =
> SinglePayloadDescriptor.HardwareInstance, UpdateImageIndex = SinglePayloadDescriptor.UpdateImageIndex)
> + FmpCapsuleHeader.AddPayload (SinglePayloadDescriptor.Guid, Result, ImageCapsuleSupport, HardwareInstance =
> SinglePayloadDescriptor.HardwareInstance, UpdateImageIndex = SinglePayloadDescriptor.UpdateImageIndex)
> try:
> for EmbeddedDriver in EmbeddedDriverDescriptorList:
> FmpCapsuleHeader.AddEmbeddedDriver(EmbeddedDriver)
> diff --git a/BaseTools/Source/Python/Common/Uefi/Capsule/FmpCapsuleHeader.py
> b/BaseTools/Source/Python/Common/Uefi/Capsule/FmpCapsuleHeader.py
> index 91d24919c4..a2a5cf0db8 100644
> --- a/BaseTools/Source/Python/Common/Uefi/Capsule/FmpCapsuleHeader.py
> +++ b/BaseTools/Source/Python/Common/Uefi/Capsule/FmpCapsuleHeader.py
> @@ -47,14 +47,19 @@ class FmpCapsuleImageHeaderClass (object):
> # /// therefore can be modified without changing the Auth data.
> # ///
> # UINT64 UpdateHardwareInstance;
> + #
> + # ///
> + # /// Bits which indicate authentication and depex information for the image that follows this structure
> + # ///
> + # UINT64 ImageCapsuleSupport
> # } EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER;
> #
> - # #define EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION 0x00000002
> + # #define EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION 0x00000003
>
> - _StructFormat = '<I16sB3BIIQ'
> + _StructFormat = '<I16sB3BIIQQ'
> _StructSize = struct.calcsize (_StructFormat)
>
> - EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION = 0x00000002
> + EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION = 0x00000003
>
> def __init__ (self):
> self._Valid = False
> @@ -64,6 +69,7 @@ class FmpCapsuleImageHeaderClass (object):
> self.UpdateImageSize = 0
> self.UpdateVendorCodeSize = 0
> self.UpdateHardwareInstance = 0x0000000000000000
> + self.ImageCapsuleSupport = 0x0000000000000000
> self.Payload = b''
> self.VendorCodeBytes = b''
>
> @@ -78,7 +84,8 @@ class FmpCapsuleImageHeaderClass (object):
> 0,0,0,
> self.UpdateImageSize,
> self.UpdateVendorCodeSize,
> - self.UpdateHardwareInstance
> + self.UpdateHardwareInstance,
> + self.ImageCapsuleSupport
> )
> self._Valid = True
> return FmpCapsuleImageHeader + self.Payload + self.VendorCodeBytes
> @@ -86,7 +93,7 @@ class FmpCapsuleImageHeaderClass (object):
> def Decode (self, Buffer):
> if len (Buffer) < self._StructSize:
> raise ValueError
> - (Version, UpdateImageTypeId, UpdateImageIndex, r0, r1, r2, UpdateImageSize, UpdateVendorCodeSize,
> UpdateHardwareInstance) = \
> + (Version, UpdateImageTypeId, UpdateImageIndex, r0, r1, r2, UpdateImageSize, UpdateVendorCodeSize,
> UpdateHardwareInstance, ImageCapsuleSupport) = \
> struct.unpack (
> self._StructFormat,
> Buffer[0:self._StructSize]
> @@ -105,6 +112,7 @@ class FmpCapsuleImageHeaderClass (object):
> self.UpdateImageSize = UpdateImageSize
> self.UpdateVendorCodeSize = UpdateVendorCodeSize
> self.UpdateHardwareInstance = UpdateHardwareInstance
> + self.ImageCapsuleSupport = ImageCapsuleSupport
> self.Payload = Buffer[self._StructSize:self._StructSize + UpdateImageSize]
> self.VendorCodeBytes = Buffer[self._StructSize + UpdateImageSize:]
> self._Valid = True
> @@ -119,6 +127,7 @@ class FmpCapsuleImageHeaderClass (object):
> print ('EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER.UpdateImageSize = {UpdateImageSize:08X}'.format
> (UpdateImageSize = self.UpdateImageSize))
> print ('EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER.UpdateVendorCodeSize = {UpdateVendorCodeSize:08X}'.format
> (UpdateVendorCodeSize = self.UpdateVendorCodeSize))
> print ('EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER.UpdateHardwareInstance =
> {UpdateHardwareInstance:016X}'.format (UpdateHardwareInstance = self.UpdateHardwareInstance))
> + print ('EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER.ImageCapsuleSupport = {ImageCapsuleSupport:016X}'.format
> (ImageCapsuleSupport = self.ImageCapsuleSupport))
> print ('sizeof (Payload) = {Size:08X}'.format (Size = len
> (self.Payload)))
> print ('sizeof (VendorCodeBytes) = {Size:08X}'.format (Size = len
> (self.VendorCodeBytes)))
>
> @@ -172,8 +181,8 @@ class FmpCapsuleHeaderClass (object):
> raise ValueError
> return self._EmbeddedDriverList[Index]
>
> - def AddPayload (self, UpdateImageTypeId, Payload = b'', VendorCodeBytes = b'', HardwareInstance = 0, UpdateImageIndex
> = 1):
> - self._PayloadList.append ((UpdateImageTypeId, Payload, VendorCodeBytes, HardwareInstance, UpdateImageIndex))
> + def AddPayload (self, UpdateImageTypeId, Payload = b'', ImageCapsuleSupport = 0, VendorCodeBytes = b'',
> HardwareInstance = 0, UpdateImageIndex = 1):
> + self._PayloadList.append ((UpdateImageTypeId, Payload, ImageCapsuleSupport, VendorCodeBytes, HardwareInstance,
> UpdateImageIndex))
>
> def GetFmpCapsuleImageHeader (self, Index):
> if Index >= len (self._FmpCapsuleImageHeaderList):
> @@ -198,13 +207,14 @@ class FmpCapsuleHeaderClass (object):
> self._ItemOffsetList.append (Offset)
> Offset = Offset + len (EmbeddedDriver)
> Index = 1
> - for (UpdateImageTypeId, Payload, VendorCodeBytes, HardwareInstance, UpdateImageIndex) in self._PayloadList:
> + for (UpdateImageTypeId, Payload, ImageCapsuleSupport, VendorCodeBytes, HardwareInstance, UpdateImageIndex) in
> self._PayloadList:
> FmpCapsuleImageHeader = FmpCapsuleImageHeaderClass ()
> FmpCapsuleImageHeader.UpdateImageTypeId = UpdateImageTypeId
> FmpCapsuleImageHeader.UpdateImageIndex = UpdateImageIndex
> FmpCapsuleImageHeader.Payload = Payload
> FmpCapsuleImageHeader.VendorCodeBytes = VendorCodeBytes
> FmpCapsuleImageHeader.UpdateHardwareInstance = HardwareInstance
> + FmpCapsuleImageHeader.ImageCapsuleSupport = ImageCapsuleSupport
> FmpCapsuleImage = FmpCapsuleImageHeader.Encode ()
> FmpCapsuleData = FmpCapsuleData + FmpCapsuleImage
>
> --
> 2.17.1
>
>
>
>
>
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