[Qemu-devel] [PATCH] PIIX4 SMBus host, EEPROM device emulation

[Ed Swierk]

The attached patch adds SMBus host support to the emulated PIIX4 power
management device (acpi.c), and adds an emulated serial EEPROM device
accessible via the SMBus interface.

I tried to follow the Intel 82371AB spec for the SMBus support; the
interface should be generic enough to implement a variety of
SMBus-compliant devices.

The EEPROM device can use a file for persistent storage
(smbus_eeprom.bin in the BIOS directory). If this file does not exist,
a temporary buffer is used instead.

I tested the devices with Linux using the i2c-piix4 host driver and
the eeprom chip driver. I have no idea what will happen on other OSes.

Comments and suggestions welcome.

--Ed

qemu-piix4-smbus-eeprom.patch
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