Re: Windows on ARM64 not able to use attached TPM 2

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Adding Leif who might add someone who knows ;)

On 8/2/21 2:09 PM, Ard Biesheuvel wrote:
> On Mon, 2 Aug 2021 at 11:51, Eric Auger <eric.auger@redhat.com> wrote:
>>
>> and also adding Ard if he is aware of any limitation the TPM2
>> integration may suffer for Windows support. On my end I am only able to
>> test on Linux atm.
>>
> 
> I never tested Windows with the TPM2 support, so I cannot answer this,
> unfortunately.
> 
>>
>> On 8/2/21 11:04 AM, Philippe Mathieu-Daudé wrote:
>>> Cc'ing Marc-André who is your EDK2 co-maintainer.
>>>
>>> On 8/1/21 2:28 AM, Stefan Berger wrote:
>>>> Hello!
>>>>
>>>>  I maintain the TPM support in QEMU and the TPM emulator (swtpm). I have
>>>> a report from a user who would like to use QEMU on ARM64 (aarch64) with
>>>> EDK2 and use an attached TPM 2 but it doesn't seem to work for him. We
>>>> know that Windows on x86_64 works with EDK2 and can use an attached TPM
>>>> 2 (using swtpm). I don't have an aarch64 host myself nor a Microsoft
>>>> account to be able to access the Windows ARM64 version, so maybe someone
>>>> here has the necessary background, credentials, and hardware to run QEMU
>>>> on using kvm to investigate what the problems may be due to on that
>>>> platform.
>>>>
>>>> https://github.com/stefanberger/swtpm/issues/493
>>>>
>>>> On Linux it seems to access the TPM emulator with the normal tpm_tis
>>>> driver.
>>>>
>>>> Regards,
>>>>
>>>>    Stefan
>>>>
>>>>
>>>>
>>
>