Re: [PATCH 3/3] hw/mips: Add MIPS virt board

[Jiaxun Yang]

> 2023年2月5日 11:48，Philippe Mathieu-Daudé <philmd@linaro.org> 写道：
> 
> Hi Jiaxun,
> 
> On 2/2/23 14:21, Jiaxun Yang wrote:
>> MIPS virt board is design to utilize existing VirtIO infrastures
>> but also comptitable with MIPS's existing internal simulation tools.
>> It includes virtio-mmio, pcie gpex, flash rom, fw_cfg, goldfish-rtc,
>> and optional goldfish_pic in case MIPS GIC is not present.
> 
> Is it worth using the CPS/GIC? Can't we using the goldfish PIC
> regardless CPS availability? Did you run performance comparison?

goldfish_pic don’t have IPI infra so we must reinvent another SMP mechanism :-(

The interrupt performance should be close as the interrupt handling flow is 
almost
the same.

Also it can help us prepare for I6400 vGIC support.

Thanks.
- Jiaxun


> 
>> It should be able to cooperate with any MIPS CPU cores.
>> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>> ---
>> v1:
>>  - Rename to virt board
>>  - Convert BIOS flash to ROM
>>  - Cleanups
>> ---
>>  MAINTAINERS                             |    7 +
>>  configs/devices/mips-softmmu/common.mak |    1 +
>>  docs/system/target-mips.rst             |   24 +
>>  hw/mips/Kconfig                         |   18 +
>>  hw/mips/meson.build                     |    1 +
>>  hw/mips/virt.c                          | 1015 +++++++++++++++++++++++
>>  6 files changed, 1066 insertions(+)
>>  create mode 100644 hw/mips/virt.c
>