[v2] TPM-CRB: Remove spurious error report when used with VFIO

[PATCH v2 0/2] TPM-CRB: Remove spurious error report when used with VFIO

Eric Auger posted 2 patches 2 years, 3 months ago

Diff against v1 v3 v4
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git fetch https://github.com/patchew-project/qemu tags/patchew/20220118153306.282681-1-eric.auger@redhat.com

Maintainers: Stefan Berger <stefanb@linux.vnet.ibm.com>, Alex Williamson <alex.williamson@redhat.com>

There is a newer version of this series

hw/tpm/meson.build   |  2 +-
hw/tpm/tpm_crb.c     | 22 ++++++++++++++++++++--
hw/vfio/common.c     | 15 ++++++++++++++-
hw/vfio/trace-events |  1 +
4 files changed, 36 insertions(+), 4 deletions(-)

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[PATCH v2 0/2] TPM-CRB: Remove spurious error report when used with VFIO

Posted by Eric Auger 2 years, 3 months ago

This series aims at removing a spurious error message we get when
launching a guest with a TPM-CRB device and VFIO-PCI devices.

The CRB command buffer currently is a RAM MemoryRegion and given
its base address alignment, it causes an error report on
vfio_listener_region_add(). This series proposes to use a ram-device
region instead which helps in better assessing the dma map error
failure on VFIO side.

Best Regards

Eric

This series can be found at:
https://github.com/eauger/qemu/tree/tpm-crb-ram-device-v2

History:
v1 -> v2:
- added tpm_crb_unrealize (dared to keep Stefan's T-b though)

Eric Auger (2):
  tpm: CRB: Use ram_device for "tpm-crb-cmd" region
  hw/vfio/common: Silence ram device offset alignment error traces

 hw/tpm/meson.build   |  2 +-
 hw/tpm/tpm_crb.c     | 22 ++++++++++++++++++++--
 hw/vfio/common.c     | 15 ++++++++++++++-
 hw/vfio/trace-events |  1 +
 4 files changed, 36 insertions(+), 4 deletions(-)

-- 
2.26.3

Re: [PATCH v2 0/2] TPM-CRB: Remove spurious error report when used with VFIO

Posted by Stefan Berger 2 years, 3 months ago

On 1/18/22 10:33, Eric Auger wrote:
> This series aims at removing a spurious error message we get when
> launching a guest with a TPM-CRB device and VFIO-PCI devices.
>
> The CRB command buffer currently is a RAM MemoryRegion and given
> its base address alignment, it causes an error report on
> vfio_listener_region_add(). This series proposes to use a ram-device
> region instead which helps in better assessing the dma map error
> failure on VFIO side.
>
> Best Regards
>
> Eric
>
> This series can be found at:
> https://github.com/eauger/qemu/tree/tpm-crb-ram-device-v2
>
> History:
> v1 -> v2:
> - added tpm_crb_unrealize (dared to keep Stefan's T-b though)
>
> Eric Auger (2):
>    tpm: CRB: Use ram_device for "tpm-crb-cmd" region
>    hw/vfio/common: Silence ram device offset alignment error traces
>
>   hw/tpm/meson.build   |  2 +-
>   hw/tpm/tpm_crb.c     | 22 ++++++++++++++++++++--
>   hw/vfio/common.c     | 15 ++++++++++++++-
>   hw/vfio/trace-events |  1 +
>   4 files changed, 36 insertions(+), 4 deletions(-)
>
Acked-by: Stefan Berger <stefanb@linux.ibm.com>