Re: [PATCH] vhost-vdpa: skip TPM CRB memory section

[Eugenio Perez Martin]

On Tue, Nov 22, 2022 at 3:53 PM <marcandre.lureau@redhat.com> wrote:
>
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> 851d6d1a0f ("vfio/common: remove spurious tpm-crb-cmd misalignment
> warning") removed the warning on vfio_listener_region_add() path.
>
> An error is reported for vhost-vdpa case:
> qemu-kvm: vhost_vdpa_listener_region_add received unaligned region
>
> Skip the CRB device.
>
> Fixes:
> https://bugzilla.redhat.com/show_bug.cgi?id=2141965
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Acked-by: Eugenio Pérez <eperezma@redhat.com>

And CCing Jason too.

> ---
>  hw/virtio/vhost-vdpa.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
> index 7468e44b87..9d7206e4b8 100644
> --- a/hw/virtio/vhost-vdpa.c
> +++ b/hw/virtio/vhost-vdpa.c
> @@ -19,6 +19,7 @@
>  #include "hw/virtio/virtio-net.h"
>  #include "hw/virtio/vhost-shadow-virtqueue.h"
>  #include "hw/virtio/vhost-vdpa.h"
> +#include "sysemu/tpm.h"
>  #include "exec/address-spaces.h"
>  #include "migration/blocker.h"
>  #include "qemu/cutils.h"
> @@ -46,6 +47,11 @@ static bool 
> vhost_vdpa_listener_skipped_section(MemoryRegionSection *section,
>  {
>      Int128 llend;
>
> +    if (TPM_IS_CRB(section->mr->owner)) {
> +        /* The CRB command buffer has its base address unaligned. */
> +        return true;
> +    }
> +
>      if ((!memory_region_is_ram(section->mr) &&
>           !memory_region_is_iommu(section->mr)) ||
>          memory_region_is_protected(section->mr) ||
> --
> 2.38.1
>