[linux-yocto] [kernel-cache][PATCH] qemuriscv64: Initial support for 64-bit QEMU RISC-V

[Bruce Ashfield]

On 2019-01-09 12:21 p.m., Alistair Francis wrote:
> On Wed, Jan 9, 2019 at 9:18 AM Bruce Ashfield
> <bruce.ashfield at windriver.com> wrote:
>>
>> On 2019-01-09 12:16 p.m., Alistair Francis wrote:
>>> On Wed, Jan 9, 2019 at 8:34 AM Bruce Ashfield
>>> <bruce.ashfield at windriver.com> wrote:
>>>>
>>>> Looks fine to me. This is on the 4.19 and master branches
>>>> of the kernel-cache.
>>>
>>> Thanks Bruce!
>>>
>>>>
>>>> I'll send SRCREV bumps for those kernel versions shortly.
>>>
>>> Do you mind if I do it? I have a patch ready now to bump the SHA and
>>> add qemuriscv64 as a supported machine.
>>
>> I have it queued with a number of other changes, so it needs to
>> come along with that SRCREV bump.
> 
> Ah, no worries then.
> 
>>
>>>
>>> Otherwise if you do can you add qemuriscv64 as compatible.
>>>
>>
>> I'd have to test it first before I could add that. What would be
>> the steps to do that ? Is everything else in oe-core ?
> 
> We would also need to add the qemuriscv64 machine in order to build it.
> 
> The only thing we are missing after that is the bootloader, which
> isn't in oe-core. We are working on a improved boot flow for RISC-V so
> the current boot loader will probably never go into oe-core.

Gotcha.

I'm just tidying up the other changes. I do expect to have them
out today. So the wait won't be too long!

Bruce

> 
> Alistair
> 
>>
>> Bruce
>>
>>> Alistair
>>>
>>>>
>>>> Cheers,
>>>>
>>>> Bruce
>>>>
>>>> On 2019-01-07 7:54 p.m., Alistair Francis wrote:
>>>>> Signed-off-by: Alistair Francis <alistair.francis at wdc.com>
>>>>> ---
>>>>>     arch/riscv/riscv.cfg                     |  8 ++++++
>>>>>     arch/riscv/riscv.scc                     |  4 +++
>>>>>     bsp/qemuriscv64/qemuriscv64-standard.scc |  8 ++++++
>>>>>     bsp/qemuriscv64/qemuriscv64.cfg          | 34 ++++++++++++++++++++++++
>>>>>     bsp/qemuriscv64/qemuriscv64.scc          |  1 +
>>>>>     5 files changed, 55 insertions(+)
>>>>>     create mode 100644 arch/riscv/riscv.cfg
>>>>>     create mode 100644 arch/riscv/riscv.scc
>>>>>     create mode 100644 bsp/qemuriscv64/qemuriscv64-standard.scc
>>>>>     create mode 100644 bsp/qemuriscv64/qemuriscv64.cfg
>>>>>     create mode 100644 bsp/qemuriscv64/qemuriscv64.scc
>>>>>
>>>>> diff --git a/arch/riscv/riscv.cfg b/arch/riscv/riscv.cfg
>>>>> new file mode 100644
>>>>> index 00000000..e19a967e
>>>>> --- /dev/null
>>>>> +++ b/arch/riscv/riscv.cfg
>>>>> @@ -0,0 +1,8 @@
>>>>> +
>>>>> +CONFIG_RISCV=y
>>>>> +CONFIG_RISCV_ISA_C=y
>>>>> +CONFIG_RISCV_ISA_A=y
>>>>> +
>>>>> +CONFIG_RISCV_TIMER=y
>>>>> +
>>>>> +CONFIG_MMU=y
>>>>> diff --git a/arch/riscv/riscv.scc b/arch/riscv/riscv.scc
>>>>> new file mode 100644
>>>>> index 00000000..a792680a
>>>>> --- /dev/null
>>>>> +++ b/arch/riscv/riscv.scc
>>>>> @@ -0,0 +1,4 @@
>>>>> +if [ "$KARCH" = "riscv" ]; then
>>>>> +     kconf hardware riscv.cfg
>>>>> +     include cfg/timer/hz_100.scc
>>>>> +fi
>>>>> diff --git a/bsp/qemuriscv64/qemuriscv64-standard.scc b/bsp/qemuriscv64/qemuriscv64-standard.scc
>>>>> new file mode 100644
>>>>> index 00000000..1725c4fa
>>>>> --- /dev/null
>>>>> +++ b/bsp/qemuriscv64/qemuriscv64-standard.scc
>>>>> @@ -0,0 +1,8 @@
>>>>> +define KMACHINE qemuriscv64
>>>>> +define KTYPE standard
>>>>> +define KARCH riscv64
>>>>> +
>>>>> +include ktypes/standard/standard.scc
>>>>> +
>>>>> +include cfg/virtio.scc
>>>>> +include qemuriscv64.scc
>>>>> diff --git a/bsp/qemuriscv64/qemuriscv64.cfg b/bsp/qemuriscv64/qemuriscv64.cfg
>>>>> new file mode 100644
>>>>> index 00000000..3e51db56
>>>>> --- /dev/null
>>>>> +++ b/bsp/qemuriscv64/qemuriscv64.cfg
>>>>> @@ -0,0 +1,34 @@
>>>>> +#
>>>>> +# RISC-V 64-bit
>>>>> +#
>>>>> +CONFIG_ARCH_RV64I=y
>>>>> +CONFIG_64BIT=y
>>>>> +
>>>>> +#
>>>>> +# Platform type
>>>>> +#
>>>>> +CONFIG_MAXPHYSMEM_128GB=y
>>>>> +CONFIG_SMP=y
>>>>> +CONFIG_NR_CPUS=8
>>>>> +CONFIG_TUNE_GENERIC=y
>>>>> +
>>>>> +#
>>>>> +# Bus support
>>>>> +#
>>>>> +CONFIG_PCI=y
>>>>> +CONFIG_PCI_ECAM=y
>>>>> +CONFIG_PCI_HOST_COMMON=y
>>>>> +CONFIG_PCI_HOST_GENERIC=y
>>>>> +CONFIG_PCIEPORTBUS=y
>>>>> +
>>>>> +#
>>>>> +# Non-8250 serial port support
>>>>> +#
>>>>> +CONFIG_HVC_DRIVER=y
>>>>> +CONFIG_HVC_RISCV_SBI=y
>>>>> +CONFIG_VIRTIO_CONSOLE=y
>>>>> +
>>>>> +#
>>>>> +# IRQ chip support
>>>>> +#
>>>>> +CONFIG_SIFIVE_PLIC=y
>>>>> diff --git a/bsp/qemuriscv64/qemuriscv64.scc b/bsp/qemuriscv64/qemuriscv64.scc
>>>>> new file mode 100644
>>>>> index 00000000..527a2878
>>>>> --- /dev/null
>>>>> +++ b/bsp/qemuriscv64/qemuriscv64.scc
>>>>> @@ -0,0 +1 @@
>>>>> +kconf hardware qemuriscv64.cfg
>>>>>
>>>>
>>