Hi Sean,

This solves my problem, thank you very much!

Cheers,
Tom

On 01/11/2018 16:43, Sean Brogan wrote:
> Tom,
>
> Short answer:  It is tool dependent. 
>
> On Windows where the ESRT and FMP have been used for years there is another 
> file that contains that information (Capsules are just driver packages so 
> there is an INF and CAT file along with the BIN).  
> Once the firmware gets to processing the actual payload (after stripping all 
> the standard headers/structures) our firmware implementation makes use of a 
> EDK2 defined header that contains this information as well as lowest 
> supported version.   See here.  
> https://github.com/tianocore/edk2/blob/master/FmpDevicePkg/Include/Library/FmpPayloadHeaderLib.h
>   
>
> Hope that helps. 
>
> Thanks
> Sean
>
>
>
> -----Original Message-----
> From: edk2-devel <edk2-devel-boun...@lists.01.org> On Behalf Of Tomas Pilar 
> (tpilar)
> Sent: Thursday, November 1, 2018 7:22 AM
> To: edk2-devel@lists.01.org
> Subject: [edk2] Capsules and versions
>
> Hi,
>
> I am trying to implement FMP in our IHV UEFI driver so that we can update 
> firmware and the driver using capsules. I get the ESRT populated by the 
> platform EsrtFmpDxe, that's all great.
>
> However, it seems that EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER does not 
> contain any version information about the firmware blob (neither Version nor 
> ImageId). How is the OS tool that stages capsules supposed to know whether 
> the capsule contains firmware that has been in fact already applied?
>
> Cheers,
> Tom
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