[PATCH v3 2/3] PCI: sandbox: Add PCI bridge emulation

[Simon Glass]

On Mon, 12 Jan 2026 at 18:21, Sean Anderson <sean.anderson at linux.dev> wrote:
>
> Add a PCI bridge emulation device. Although real bridges need to be
> configured in order to forward requests, this happens automatically for
> now (see arch/sandbox/lib/pci_io.c). So just record the window registers
> and check them in a test to make sure pci_auto is sane.
>
> As each bridge consume at least 4k I/O registers, increase the root
> port's I/O space so we have some left for other devices.
>
> Signed-off-by: Sean Anderson <sean.anderson at linux.dev>
> ---
>
> Changes in v3:
> - New
>
>  arch/sandbox/dts/test.dts        |  35 +++++-
>  arch/sandbox/include/asm/test.h  |   1 +
>  drivers/pci/Makefile             |   2 +-
>  drivers/pci/pci_sandbox_bridge.c | 192 +++++++++++++++++++++++++++++++
>  test/dm/pci.c                    | 142 +++++++++++++++++++++++
>  5 files changed, 370 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/pci/pci_sandbox_bridge.c

Reviewed-by: Simon Glass <simon.glass at canonical.com>