Messages in this thread | | | Subject | Re: [v5.4 stable] arm: stm32: Regression observed on "no-map" reserved memory region | From | Alexandre TORGUE <> | Date | Fri, 7 May 2021 17:15:20 +0200 |
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Hi Quentin
On 4/22/21 2:59 PM, Quentin Perret wrote: > On Wednesday 21 Apr 2021 at 07:33:52 (-0700), Florian Fainelli wrote: >> It is not, otherwise I would have noticed earlier, can you try the same >> thing that happens on my platform with a reserved region (without >> no-map) adjacent to a reserved region with 'no-map'? > > I just tried, but still no luck. FTR, I tried to reproduce your setup > with the following DT: > > memory@40000000 { > reg = <0x00 0x40000000 0x01 0x00>; > device_type = "memory"; > }; > > reserved-memory { > #address-cells = <2>; > #size-cells = <2>; > ranges; > > foo@fdfff000{ > reg = <0x00 0xfdfff000 0x0 0x1000>; > }; > bar@fe000000{ > reg = <0x00 0xfe000000 0x0 0x2000000>; > no-map; > }; > }; > > And with 5.4.102 and 5.10.31 I get the following in /proc/iomem > > <...> > 40000000-fdffffff : System RAM > 40080000-412cffff : Kernel code > 412d0000-417affff : reserved > 417b0000-419f8fff : Kernel data > 48000000-48008fff : reserved > f7c00000-fdbfffff : reserved > fdfff000-fdffffff : reserved > fe000000-ffffffff : reserved > 100000000-13fffffff : System RAM > <...> > > which looks about right. I'll keep trying a few other things.
Did you get time to continue some tests on this issue ?
On my side this DT is not working:
memory@c0000000 { reg = <0xc0000000 0x20000000>; };
reserved-memory { #address-cells = <1>; #size-cells = <1>; ranges;
gpu_reserved: gpu@d4000000 { reg = <0xd4000000 0x4000000>; no-map; }; };
Let me know if I can help.
regards Alex
> Thanks, > Quentin >
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