Re: [PATCH 0/3] hw/i386: Add MTD controller on ICH9

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Oct 18, 2023 at 01:52:28PM +0200, Patrick Rudolph wrote:
> This series implements a feature complete MTD SPI flash controller
> as found on real ICH9, adds cache coherent BIOS MMAPing and implements
> a few SMM bits to allow x86 firmware build for real ICH9 to operate on
> the flash controller to store (UEFI) variables or do firmware updates.
> 
> Patrick Rudolph (3):
>   hw/isa/ich9: Add SPI controller
>   hw/isa/lpc_ich9: Implement SMI_STS for APMC
>   hw/i386/pc_sysfw: Do not create BIOS region if MTD is present


Given all this is guest-visible, one thing we need for sure is
a flag disabling this new stuff, and tied to existing machine types.

>  hw/acpi/ich9.c                    |   5 +
>  hw/acpi/ich9_tco.c                |   5 +
>  hw/i386/pc_sysfw.c                |   6 +
>  hw/isa/Kconfig                    |   2 +
>  hw/isa/lpc_ich9.c                 |   4 +
>  hw/isa/meson.build                |   2 +-
>  hw/isa/spi_ich9.c                 | 448 ++++++++++++++++++++++++++++++
>  include/hw/southbridge/ich9.h     |   6 +
>  include/hw/southbridge/ich9_spi.h |  80 ++++++
>  9 files changed, 557 insertions(+), 1 deletion(-)
>  create mode 100644 hw/isa/spi_ich9.c
>  create mode 100644 include/hw/southbridge/ich9_spi.h
> 
> -- 
> 2.41.0