Re: [Qemu-devel] [PATCH 1/2] sysbus: always allow explicit_ofw_unit_address() to override address generation

[Thomas Huth <thuth@redhat.com>]

On 08/05/2018 01:28 PM, Mark Cave-Ayland wrote:
> Some SysBusDevices either use sysbus_init_mmio() without
> sysbus_mmio_map() or the first MMIO memory region doesn't represent the
> bus address, causing a firmware device path with an invalid address to
> be generated.
> 
> SysBusDeviceClass does provide a virtual explicit_ofw_unit_address()
> method that can be used to override this process, but it was originally intended
> only as as a fallback option meaning that any existing MMIO memory regions still
> take priority whilst determining the firmware device address.
> 
> There is currently only one user of explicit_ofw_unit_address() and that
> is the PCI expander bridge (PXB) device which has no MMIO/PIO resources
> defined. This enables us to allow explicit_ofw_unit_address() to take
> priority without affecting backwards compatibility, allowing the address
> to be customised as required.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
> ---
>  hw/core/sysbus.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)

Looks reasonable.

Reviewed-by: Thomas Huth <thuth@redhat.com>