Re: [PATCH v3 0/3] hw/arm/virt_acpi_build: Upgrate the IORT table up to revision E.b

[Eric Auger]

Hi,

On 10/14/21 1:56 PM, Eric Auger wrote:
> This series upgrades the ACPI IORT table up to the E.b
> specification revision. One of the goal of this upgrade
> is to allow the addition of RMR nodes along with the SMMUv3.

while I have sent a separate RFC to expose RMR nodes along with SMMUv3 I
must aknowledge this will take time to be upstreamed (SMMUv3 nested
stage thingy), if ever, and this anyway requires additional time to mature:
- there is one problem with the IORT spec which mandates 1 RMR node per
BDF and also
- there is the issue of the boot preserve_config which was known to
introduce some regressions and which is also mandated by the IORT spec.

So I wanted to emphasize that this IORT upgrade does not come at the
moment with any new feature. My understanding is old guests should work
fine with this new revision but if you feel that's a bad thing, please
raise your voice.

Thanks

Eric
>
> The latest IORT specification (ARM DEN 0049E.b) can be found at
> IO Remapping Table - Platform Design Document
> https://developer.arm.com/documentation/den0049/latest/
>
> This series can be found at
> https://github.com/eauger/qemu.git
> branch: iort_Eb_v3
>
> History:
> v2 -> v3:
> - comment on IORT node ID (Igor)
> - single mapping disabled comment
> - Added Jean and Igor's R-b
> - added diff to patvch 3/3
>
> v1 -> v2:
> - fix Revision value in ITS and SMMUv3 nodes (Phil)
> - Increment an identifier (Phil)
>
> Eric Auger (3):
>   tests/acpi: Get prepared for IORT E.b revision upgrade
>   hw/arm/virt-acpi-build: IORT upgrade up to revision E.b
>   tests/acpi: Generate reference blob for IORT rev E.b
>
>  hw/arm/virt-acpi-build.c          |  48 ++++++++++++++++++------------
>  tests/data/acpi/virt/IORT         | Bin 124 -> 128 bytes
>  tests/data/acpi/virt/IORT.memhp   | Bin 124 -> 128 bytes
>  tests/data/acpi/virt/IORT.numamem | Bin 124 -> 128 bytes
>  tests/data/acpi/virt/IORT.pxb     | Bin 124 -> 128 bytes
>  5 files changed, 29 insertions(+), 19 deletions(-)
>