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Re: [PATCH v4 0/6] Dynamic allocation of memory regions and IBM vTPM 2.0
From: |
Robbie Harwood |
Subject: |
Re: [PATCH v4 0/6] Dynamic allocation of memory regions and IBM vTPM 2.0 |
Date: |
Tue, 28 Feb 2023 12:50:39 -0500 |
Stefan Berger <stefanb@linux.ibm.com> writes:
> Hello,
>
> This is an addition to the series sent from Daniel Axtens
> (https://lists.gnu.org/archive/html/grub-devel/2022-04/msg00064.html).
>
> Patch 'ieee1275: request memory with ibm,client-architecture-support'
> implements vectors 1-4 of client-architecture-support negotiation
> However, during some tests, we found this can be a problem if:
>
> - we have more than 64 CPUs
> - Hardware Management Console (HMC) is configured to minimum of CPUs >64 (for
> example, min of 200 CPUs)
> - Grub needs to request memory.
>
> If vector 5 is not implemented, Power Hypervisor will consider the default
> value for vector 5 and 64 will bet set as the maximum number of CPUs
> supported by the OS, causing the machine to fail to init. Today we support
> 256 CPUs (max) on Power, so we need to implement vector 5 and set the MAX
> CPUs bits to this value.
>
> Add an IBM/ieee1275 vTPM 2.0 driver that requires the preceeding memory
> patches due to the grub's TPM subsystem needing large chunks of memory for
> hashing of files such as initrd and kernel.
>
> Stefan
For the series:
Reviewed-by: Robbie Harwood <rharwood@redhat.com>
Be well,
--Robbie
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- [PATCH v4 3/6] ieee1275: support runtime memory claiming, (continued)
- [PATCH v4 3/6] ieee1275: support runtime memory claiming, Stefan Berger, 2023/02/06
- [PATCH v4 4/6] ieee1275: implement vec5 for cas negotiation, Stefan Berger, 2023/02/06
- [PATCH v4 6/6] ibmvtpm: Add support for trusted boot using a vTPM 2.0, Stefan Berger, 2023/02/06
- [PATCH v4 2/6] ieee1275: drop len -= 1 quirk in heap_init, Stefan Berger, 2023/02/06
- Re: [PATCH v4 0/6] Dynamic allocation of memory regions and IBM vTPM 2.0, Nageswara R Sastry, 2023/02/13
- Re: [PATCH v4 0/6] Dynamic allocation of memory regions and IBM vTPM 2.0,
Robbie Harwood <=