Re: [PATCH 1/5] arm64: zynqmp: Add firmware DT node

[Michal Simek]

Hi, +Edgar


On 08. 12. 19 23:38, Guenter Roeck wrote:
> On Fri, Oct 18, 2019 at 06:07:31PM +0200, Michael Tretter wrote:
>> From: Rajan Vaja <address@hidden>
>>
>> Add firmware DT node in ZynqMP device tree. This node
>> uses bindings as per new firmware interface driver.
>>
>> Signed-off-by: Rajan Vaja <address@hidden>
>> Signed-off-by: Michal Simek <address@hidden>
>> Signed-off-by: Michael Tretter <address@hidden>
> 
> With this patch applied in the mainline kernel, the qemu xlnx-zcu102
> emulation crashes (see below). Any idea what it might take to get
> qemu back to working ?

Driver talks through ATF to PMU unit(microblaze). I don't think A53+MB
concept is working with mainline qemu. But crash is too hard. It should
be no response from PMU and then this panic.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/firmware/xilinx/zynqmp.c?h=v5.5-rc1#n728

Edgar: can you please comment this?

Thanks,
Michal