Re: [RFC v2 2/2] hw/riscv: Add server platform reference machine

["Wu, Fei" <fei2.wu@intel.com>]

On 3/23/2024 3:14 AM, Atish Kumar Patra wrote:
> On Tue, Mar 12, 2024 at 6:53 AM Fei Wu <fei2.wu@intel.com> wrote:
>>
>> The RISC-V Server Platform specification[1] defines a standardized set
>> of hardware and software capabilities, that portable system software,
>> such as OS and hypervisors can rely on being present in a RISC-V server
>> platform.
>>

[...]

>> +
>> +static void finalize_fdt(RVSPMachineState *s)
>> +{
>> +    uint32_t phandle = 1, irq_mmio_phandle = 1, msi_pcie_phandle = 1;
>> +    uint32_t irq_pcie_phandle = 1;
>> +
>> +    create_fdt_sockets(s, rvsp_ref_memmap, &phandle, &irq_mmio_phandle,
>> +                       &irq_pcie_phandle, &msi_pcie_phandle);
>> +
>> +    create_fdt_pcie(s, rvsp_ref_memmap, irq_pcie_phandle, msi_pcie_phandle);
>> +
>> +    create_fdt_reset(s, rvsp_ref_memmap, &phandle);
>> +
>> +    create_fdt_uart(s, rvsp_ref_memmap, irq_mmio_phandle);
>> +
>> +    create_fdt_rtc(s, rvsp_ref_memmap, irq_mmio_phandle);
> 
> 
> We need a minimalistic DT for firmwares which probably don't use rtc, pcie etc.
> Does EDK2 plan to generate ACPI tables from these DT ? Otherwise, we
> can get rid of these.
> 
Yes, I agree. Eventually we can remove many of these fdt when EDK2 is
able to generate the ACPI tables directly. I add it here as EDK2 has not
been adapted yet, the system won't boot up with the upstream EDK2 if
e.g. fdt of pcie is removed.

Thanks,
Fei.

> As Heinrich said, Linux kernels should boot using ACPI only.
>