[PATCH 0/2] vhost-vdpa: skip TPM CRB memory section

[Laurent Vivier <lvivier@redhat.com>]

An error is reported for vhost-vdpa case:
qemu-kvm: vhost_vdpa_listener_region_add received unaligned region

Marc-André has proposed a fix to this problem by skipping
the memory region owned by the TPM CRB but it seems more generic
to skip not DMA-able memory.

We have a memory flag for that, RAM_PROTECTED.

This series expands the memory API to provide a way to initialize
a "protected" memory region and use it with the TPM CRB object.

For the previous discussions, see

https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg03670.html

and from Eric for VFIO:

https://lore.kernel.org/all/20220506132510.1847942-1-eric.auger@redhat.com/
https://lore.kernel.org/all/20220524091405.416256-1-eric.auger@redhat.com/

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=2141965

Thanks,
Laurent

Laurent Vivier (2):
  memory: introduce memory_region_init_ram_protected()
  tpm_crb: mark memory as protected

 hw/tpm/tpm_crb.c      |  2 +-
 include/exec/memory.h | 33 +++++++++++++++++++++++++++++++++
 softmmu/memory.c      | 33 +++++++++++++++++++++++++++------
 softmmu/physmem.c     |  4 ++--
 4 files changed, 63 insertions(+), 9 deletions(-)

-- 
2.41.0