[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Nico Becker]

if i remove the arm,shared-override option in the dts file,
the kernel boot without an error.
With the option the kernel boots with the following error:
dmesg --level=err
L2C-310: enabling full line of zeros but not enabled in Cortex-A9

i ve no idea why the parameter have an effect on that. i try several 
kernels, allays the same behavior.


diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index eda558f2fe..c2173416c7 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -719,7 +719,6 @@
 ???? ??? ??? arm,data-latency = <2 1 1>;
 ???? ??? ??? prefetch-data = <1>;
 ???? ??? ??? prefetch-instr = <1>;
-??? ??? ??? arm,shared-override;
 ???? ??? ??? arm,double-linefill = <1>;
 ???? ??? ??? arm,double-linefill-incr = <0>;
 ???? ??? ??? arm,double-linefill-wrap = <1>;

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Marek Vasut]

On 6/10/20 3:14 PM, Nico Becker wrote:
> if i remove the arm,shared-override option in the dts file,
> the kernel boot without an error.
> With the option the kernel boots with the following error:
> dmesg --level=err
> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
> 
> i ve no idea why the parameter have an effect on that. i try several
> kernels, allays the same behavior.
> 
> 
> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> index eda558f2fe..c2173416c7 100644
> --- a/arch/arm/dts/socfpga.dtsi
> +++ b/arch/arm/dts/socfpga.dtsi
> @@ -719,7 +719,6 @@
> ???? ??? ??? arm,data-latency = <2 1 1>;
> ???? ??? ??? prefetch-data = <1>;
> ???? ??? ??? prefetch-instr = <1>;
> -??? ??? ??? arm,shared-override;
> ???? ??? ??? arm,double-linefill = <1>;
> ???? ??? ??? arm,double-linefill-incr = <0>;
> ???? ??? ??? arm,double-linefill-wrap = <1>;
> 

Do you use latest u-boot/master or some older version ? Which one?

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Nico Becker]

Am 10.06.2020 um 15:19 schrieb Marek Vasut:
> On 6/10/20 3:14 PM, Nico Becker wrote:
>> if i remove the arm,shared-override option in the dts file,
>> the kernel boot without an error.
>> With the option the kernel boots with the following error:
>> dmesg --level=err
>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>
>> i ve no idea why the parameter have an effect on that. i try several
>> kernels, allays the same behavior.
>>
>>
>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>> index eda558f2fe..c2173416c7 100644
>> --- a/arch/arm/dts/socfpga.dtsi
>> +++ b/arch/arm/dts/socfpga.dtsi
>> @@ -719,7 +719,6 @@
>>  ???? ??? ??? arm,data-latency = <2 1 1>;
>>  ???? ??? ??? prefetch-data = <1>;
>>  ???? ??? ??? prefetch-instr = <1>;
>> -??? ??? ??? arm,shared-override;
>>  ???? ??? ??? arm,double-linefill = <1>;
>>  ???? ??? ??? arm,double-linefill-incr = <0>;
>>  ???? ??? ??? arm,double-linefill-wrap = <1>;
>>
> Do you use latest u-boot/master or some older version ? Which one?

sorry, i forget it.

i use v2020.01

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Marek Vasut]

On 6/10/20 3:21 PM, Nico Becker wrote:
> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>> if i remove the arm,shared-override option in the dts file,
>>> the kernel boot without an error.
>>> With the option the kernel boots with the following error:
>>> dmesg --level=err
>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>>
>>> i ve no idea why the parameter have an effect on that. i try several
>>> kernels, allays the same behavior.
>>>
>>>
>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>>> index eda558f2fe..c2173416c7 100644
>>> --- a/arch/arm/dts/socfpga.dtsi
>>> +++ b/arch/arm/dts/socfpga.dtsi
>>> @@ -719,7 +719,6 @@
>>> ????? ??? ??? arm,data-latency = <2 1 1>;
>>> ????? ??? ??? prefetch-data = <1>;
>>> ????? ??? ??? prefetch-instr = <1>;
>>> -??? ??? ??? arm,shared-override;
>>> ????? ??? ??? arm,double-linefill = <1>;
>>> ????? ??? ??? arm,double-linefill-incr = <0>;
>>> ????? ??? ??? arm,double-linefill-wrap = <1>;
>>>
>> Do you use latest u-boot/master or some older version ? Which one?
> 
> sorry, i forget it.
> 
> i use v2020.01

Should be OK I think. Hmmmmm, I suspect this is another fun with the
ACTLR/CPACR registers, like 937db7188e3a5ab8f802eff9b57854189379667a .
Ley, any ideas ?

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Dinh Nguyen]

On 6/10/20 8:23 AM, Marek Vasut wrote:
> On 6/10/20 3:21 PM, Nico Becker wrote:
>> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>>> if i remove the arm,shared-override option in the dts file,
>>>> the kernel boot without an error.
>>>> With the option the kernel boots with the following error:
>>>> dmesg --level=err
>>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>>>
>>>> i ve no idea why the parameter have an effect on that. i try several
>>>> kernels, allays the same behavior.
>>>>
>>>>
>>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>>>> index eda558f2fe..c2173416c7 100644
>>>> --- a/arch/arm/dts/socfpga.dtsi
>>>> +++ b/arch/arm/dts/socfpga.dtsi
>>>> @@ -719,7 +719,6 @@
>>>> ????? ??? ??? arm,data-latency = <2 1 1>;
>>>> ????? ??? ??? prefetch-data = <1>;
>>>> ????? ??? ??? prefetch-instr = <1>;
>>>> -??? ??? ??? arm,shared-override;
>>>> ????? ??? ??? arm,double-linefill = <1>;
>>>> ????? ??? ??? arm,double-linefill-incr = <0>;
>>>> ????? ??? ??? arm,double-linefill-wrap = <1>;
>>>>
>>> Do you use latest u-boot/master or some older version ? Which one?
>>
>> sorry, i forget it.
>>
>> i use v2020.01
> 
> Should be OK I think. Hmmmmm, I suspect this is another fun with the
> ACTLR/CPACR registers, like 937db7188e3a5ab8f802eff9b57854189379667a .
> Ley, any ideas ?
> 

I just tested with

2020.07-rc4-00022-gbe79009f3b along with linux v5.7,

and I no longer see the error.

Dinh

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Tan, Ley Foon]

> -----Original Message-----
> From: Dinh Nguyen <dinguyen@kernel.org>
> Sent: Thursday, June 11, 2020 2:55 AM
> To: Marek Vasut <marex@denx.de>; Nico Becker <u-boot@ic-
> automation.de>; u-boot at lists.denx.de
> Cc: simon.k.r.goldschmidt at gmail.com; Tan, Ley Foon
> <ley.foon.tan@intel.com>
> Subject: Re: [PATCH] arm: dts: socfpga: l2c-310 full line of zeros error
> @kernel boot
> 
> 
> 
> On 6/10/20 8:23 AM, Marek Vasut wrote:
> > On 6/10/20 3:21 PM, Nico Becker wrote:
> >> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
> >>> On 6/10/20 3:14 PM, Nico Becker wrote:
> >>>> if i remove the arm,shared-override option in the dts file, the
> >>>> kernel boot without an error.
> >>>> With the option the kernel boots with the following error:
> >>>> dmesg --level=err
> >>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
> >>>>
> >>>> i ve no idea why the parameter have an effect on that. i try
> >>>> several kernels, allays the same behavior.
> >>>>
> >>>>
> >>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> >>>> index eda558f2fe..c2173416c7 100644
> >>>> --- a/arch/arm/dts/socfpga.dtsi
> >>>> +++ b/arch/arm/dts/socfpga.dtsi
> >>>> @@ -719,7 +719,6 @@
> >>>> ????? ??? ??? arm,data-latency = <2 1 1>;
> >>>> ????? ??? ??? prefetch-data = <1>;
> >>>> ????? ??? ??? prefetch-instr = <1>;
> >>>> -??? ??? ??? arm,shared-override;
> >>>> ????? ??? ??? arm,double-linefill = <1>;
> >>>> ????? ??? ??? arm,double-linefill-incr = <0>;
> >>>> ????? ??? ??? arm,double-linefill-wrap = <1>;
> >>>>
> >>> Do you use latest u-boot/master or some older version ? Which one?
> >>
> >> sorry, i forget it.
> >>
> >> i use v2020.01
> >
> > Should be OK I think. Hmmmmm, I suspect this is another fun with the
> > ACTLR/CPACR registers, like
> 937db7188e3a5ab8f802eff9b57854189379667a .
> > Ley, any ideas ?
> >
> 
> I just tested with
> 
> 2020.07-rc4-00022-gbe79009f3b along with linux v5.7,
> 
> and I no longer see the error.
> 
Yes, I also just tested 2020.04 uboot and 5.4.23-lts kernel, also didn't see this error.
What kernel version you are using?

Regards
Ley Foon

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Nico Becker]

Am 11.06.2020 um 03:51 schrieb Tan, Ley Foon:
>
>> -----Original Message-----
>> From: Dinh Nguyen <dinguyen@kernel.org>
>> Sent: Thursday, June 11, 2020 2:55 AM
>> To: Marek Vasut <marex@denx.de>; Nico Becker <u-boot@ic-
>> automation.de>; u-boot at lists.denx.de
>> Cc: simon.k.r.goldschmidt at gmail.com; Tan, Ley Foon
>> <ley.foon.tan@intel.com>
>> Subject: Re: [PATCH] arm: dts: socfpga: l2c-310 full line of zeros error
>> @kernel boot
>>
>>
>>
>> On 6/10/20 8:23 AM, Marek Vasut wrote:
>>> On 6/10/20 3:21 PM, Nico Becker wrote:
>>>> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>>>>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>>>>> if i remove the arm,shared-override option in the dts file, the
>>>>>> kernel boot without an error.
>>>>>> With the option the kernel boots with the following error:
>>>>>> dmesg --level=err
>>>>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>>>>>
>>>>>> i ve no idea why the parameter have an effect on that. i try
>>>>>> several kernels, allays the same behavior.
>>>>>>
>>>>>>
>>>>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>>>>>> index eda558f2fe..c2173416c7 100644
>>>>>> --- a/arch/arm/dts/socfpga.dtsi
>>>>>> +++ b/arch/arm/dts/socfpga.dtsi
>>>>>> @@ -719,7 +719,6 @@
>>>>>>  ????? ??? ??? arm,data-latency = <2 1 1>;
>>>>>>  ????? ??? ??? prefetch-data = <1>;
>>>>>>  ????? ??? ??? prefetch-instr = <1>;
>>>>>> -??? ??? ??? arm,shared-override;
>>>>>>  ????? ??? ??? arm,double-linefill = <1>;
>>>>>>  ????? ??? ??? arm,double-linefill-incr = <0>;
>>>>>>  ????? ??? ??? arm,double-linefill-wrap = <1>;
>>>>>>
>>>>> Do you use latest u-boot/master or some older version ? Which one?
>>>> sorry, i forget it.
>>>>
>>>> i use v2020.01
>>> Should be OK I think. Hmmmmm, I suspect this is another fun with the
>>> ACTLR/CPACR registers, like
>> 937db7188e3a5ab8f802eff9b57854189379667a .
>>> Ley, any ideas ?
>>>
>> I just tested with
>>
>> 2020.07-rc4-00022-gbe79009f3b along with linux v5.7,
>>
>> and I no longer see the error.
>>
> Yes, I also just tested 2020.04 uboot and 5.4.23-lts kernel, also didn't see this error.
> What kernel version you are using?
>
> Regards
> Ley Foon
hello,
i use kernel 4.14.126-rt62-ltsi.

greetings

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Nico Becker]

Am 12.06.2020 um 07:51 schrieb Nico Becker:
> Am 11.06.2020 um 03:51 schrieb Tan, Ley Foon:
>>
>>> -----Original Message-----
>>> From: Dinh Nguyen <dinguyen@kernel.org>
>>> Sent: Thursday, June 11, 2020 2:55 AM
>>> To: Marek Vasut <marex@denx.de>; Nico Becker <u-boot@ic-
>>> automation.de>; u-boot at lists.denx.de
>>> Cc: simon.k.r.goldschmidt at gmail.com; Tan, Ley Foon
>>> <ley.foon.tan@intel.com>
>>> Subject: Re: [PATCH] arm: dts: socfpga: l2c-310 full line of zeros 
>>> error
>>> @kernel boot
>>>
>>>
>>>
>>> On 6/10/20 8:23 AM, Marek Vasut wrote:
>>>> On 6/10/20 3:21 PM, Nico Becker wrote:
>>>>> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>>>>>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>>>>>> if i remove the arm,shared-override option in the dts file, the
>>>>>>> kernel boot without an error.
>>>>>>> With the option the kernel boots with the following error:
>>>>>>> dmesg --level=err
>>>>>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>>>>>>
>>>>>>> i ve no idea why the parameter have an effect on that. i try
>>>>>>> several kernels, allays the same behavior.
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>>>>>>> index eda558f2fe..c2173416c7 100644
>>>>>>> --- a/arch/arm/dts/socfpga.dtsi
>>>>>>> +++ b/arch/arm/dts/socfpga.dtsi
>>>>>>> @@ -719,7 +719,6 @@
>>>>>>> ?????? ??? ??? arm,data-latency = <2 1 1>;
>>>>>>> ?????? ??? ??? prefetch-data = <1>;
>>>>>>> ?????? ??? ??? prefetch-instr = <1>;
>>>>>>> -??? ??? ??? arm,shared-override;
>>>>>>> ?????? ??? ??? arm,double-linefill = <1>;
>>>>>>> ?????? ??? ??? arm,double-linefill-incr = <0>;
>>>>>>> ?????? ??? ??? arm,double-linefill-wrap = <1>;
>>>>>>>
>>>>>> Do you use latest u-boot/master or some older version ? Which one?
>>>>> sorry, i forget it.
>>>>>
>>>>> i use v2020.01
>>>> Should be OK I think. Hmmmmm, I suspect this is another fun with the
>>>> ACTLR/CPACR registers, like
>>> 937db7188e3a5ab8f802eff9b57854189379667a .
>>>> Ley, any ideas ?
>>>>
>>> I just tested with
>>>
>>> 2020.07-rc4-00022-gbe79009f3b along with linux v5.7,
>>>
>>> and I no longer see the error.
>>>
>> Yes, I also just tested 2020.04 uboot and 5.4.23-lts kernel, also 
>> didn't see this error.
>> What kernel version you are using?
>>
>> Regards
>> Ley Foon
> hello,
> i use kernel 4.14.126-rt62-ltsi.
>
> greetings
>
>
i try the u-boot version v2020.07-rc4 without the patch,
and everything seems okay, no error at boot.
i ve no idea why the error at boot time is gone with the 2020.07-rc4 
version.
does anyone have any idea why?
thanks, greetings

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Nico Becker]

Am 12.06.2020 um 22:27 schrieb Dinh Nguyen:
>
> On 6/12/20 6:41 AM, Marek Vasut wrote:
>> On 6/12/20 1:04 PM, Nico Becker wrote:
>>> Am 12.06.2020 um 07:51 schrieb Nico Becker:
>>>> Am 11.06.2020 um 03:51 schrieb Tan, Ley Foon:
>>>>>> -----Original Message-----
>>>>>> From: Dinh Nguyen <dinguyen@kernel.org>
>>>>>> Sent: Thursday, June 11, 2020 2:55 AM
>>>>>> To: Marek Vasut <marex@denx.de>; Nico Becker <u-boot@ic-
>>>>>> automation.de>; u-boot at lists.denx.de
>>>>>> Cc: simon.k.r.goldschmidt at gmail.com; Tan, Ley Foon
>>>>>> <ley.foon.tan@intel.com>
>>>>>> Subject: Re: [PATCH] arm: dts: socfpga: l2c-310 full line of zeros
>>>>>> error
>>>>>> @kernel boot
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 6/10/20 8:23 AM, Marek Vasut wrote:
>>>>>>> On 6/10/20 3:21 PM, Nico Becker wrote:
>>>>>>>> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>>>>>>>>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>>>>>>>>> if i remove the arm,shared-override option in the dts file, the
>>>>>>>>>> kernel boot without an error.
>>>>>>>>>> With the option the kernel boots with the following error:
>>>>>>>>>> dmesg --level=err
>>>>>>>>>> L2C-310: enabling full line of zeros but not enabled in Cortex-A9
>>>>>>>>>>
>>>>>>>>>> i ve no idea why the parameter have an effect on that. i try
>>>>>>>>>> several kernels, allays the same behavior.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
>>>>>>>>>> index eda558f2fe..c2173416c7 100644
>>>>>>>>>> --- a/arch/arm/dts/socfpga.dtsi
>>>>>>>>>> +++ b/arch/arm/dts/socfpga.dtsi
>>>>>>>>>> @@ -719,7 +719,6 @@
>>>>>>>>>>  ?????? ??? ??? arm,data-latency = <2 1 1>;
>>>>>>>>>>  ?????? ??? ??? prefetch-data = <1>;
>>>>>>>>>>  ?????? ??? ??? prefetch-instr = <1>;
>>>>>>>>>> -??? ??? ??? arm,shared-override;
>>>>>>>>>>  ?????? ??? ??? arm,double-linefill = <1>;
>>>>>>>>>>  ?????? ??? ??? arm,double-linefill-incr = <0>;
>>>>>>>>>>  ?????? ??? ??? arm,double-linefill-wrap = <1>;
>>>>>>>>>>
>>>>>>>>> Do you use latest u-boot/master or some older version ? Which one?
>>>>>>>> sorry, i forget it.
>>>>>>>>
>>>>>>>> i use v2020.01
>>>>>>> Should be OK I think. Hmmmmm, I suspect this is another fun with the
>>>>>>> ACTLR/CPACR registers, like
>>>>>> 937db7188e3a5ab8f802eff9b57854189379667a .
>>>>>>> Ley, any ideas ?
>>>>>>>
>>>>>> I just tested with
>>>>>>
>>>>>> 2020.07-rc4-00022-gbe79009f3b along with linux v5.7,
>>>>>>
>>>>>> and I no longer see the error.
>>>>>>
>>>>> Yes, I also just tested 2020.04 uboot and 5.4.23-lts kernel, also
>>>>> didn't see this error.
>>>>> What kernel version you are using?
>>>>>
>>>>> Regards
>>>>> Ley Foon
>>>> hello,
>>>> i use kernel 4.14.126-rt62-ltsi.
>>>>
>>>> greetings
>>>>
>>>>
>>> i try the u-boot version v2020.07-rc4 without the patch,
>>> and everything seems okay, no error at boot.
>>> i ve no idea why the error at boot time is gone with the 2020.07-rc4
>>> version.
>>> does anyone have any idea why?
>>> thanks, greetings
>> You can try git bisect between the two versions to find out which patch
>> caused this.
>>
> This is the patch that fixed it:
>
> commit f62782fb2999dd8109a3ffe9ee0a51e54ab034ab
> Author: Ley Foon Tan <ley.foon.tan@intel.com>
> Date:   Fri Apr 17 14:45:35 2020 +0800
>
>      cache: l2x0: Fix write to incorrect shared-override bit
>
>      The existing code write bit-0 for shared attribute override enable bit.
>      It should be bit-22 based on cache controller specification [1].
>
>      [1]
> http://infocenter.arm.com/help/topic/com.arm.doc.ddi0246f/DDI0246F_l2c310_r3p2_trm.pdf
>
>      Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
>
> Dinh
>
hello,
thanks a lot!
i try the git bisect method, i was? 13 builds away.
next time i check first the changelog
greetings

[PATCH] arm: dts: socfpga: l2c-310 full line of zeros error @kernel boot

[Dinh Nguyen]

On 6/15/20 12:56 AM, Nico Becker wrote:
> Am 12.06.2020 um 22:27 schrieb Dinh Nguyen:
>>
>> On 6/12/20 6:41 AM, Marek Vasut wrote:
>>> On 6/12/20 1:04 PM, Nico Becker wrote:
>>>> Am 12.06.2020 um 07:51 schrieb Nico Becker:
>>>>> Am 11.06.2020 um 03:51 schrieb Tan, Ley Foon:
>>>>>>> -----Original Message-----
>>>>>>> From: Dinh Nguyen <dinguyen@kernel.org>
>>>>>>> Sent: Thursday, June 11, 2020 2:55 AM
>>>>>>> To: Marek Vasut <marex@denx.de>; Nico Becker <u-boot@ic-
>>>>>>> automation.de>; u-boot at lists.denx.de
>>>>>>> Cc: simon.k.r.goldschmidt at gmail.com; Tan, Ley Foon
>>>>>>> <ley.foon.tan@intel.com>
>>>>>>> Subject: Re: [PATCH] arm: dts: socfpga: l2c-310 full line of zeros
>>>>>>> error
>>>>>>> @kernel boot
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 6/10/20 8:23 AM, Marek Vasut wrote:
>>>>>>>> On 6/10/20 3:21 PM, Nico Becker wrote:
>>>>>>>>> Am 10.06.2020 um 15:19 schrieb Marek Vasut:
>>>>>>>>>> On 6/10/20 3:14 PM, Nico Becker wrote:
>>>>>>>>>>> if i remove the arm,shared-override option in the dts file, the
>>>>>>>>>>> kernel boot without an error.
>>>>>>>>>>> With the option the kernel boots with the following error:
>>>>>>>>>>> dmesg --level=err
>>>>>>>>>>> L2C-310: enabling full line of zeros but not enabled in
>>>>>>>>>>> Cortex-A9
>>>>>>>>>>>
>>>>>>>>>>> i ve no idea why the parameter have an effect on that. i try
>>>>>>>>>>> several kernels, allays the same behavior.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/arch/arm/dts/socfpga.dtsi
>>>>>>>>>>> b/arch/arm/dts/socfpga.dtsi
>>>>>>>>>>> index eda558f2fe..c2173416c7 100644
>>>>>>>>>>> --- a/arch/arm/dts/socfpga.dtsi
>>>>>>>>>>> +++ b/arch/arm/dts/socfpga.dtsi
>>>>>>>>>>> @@ -719,7 +719,6 @@
>>>>>>>>>>> ??????? ??? ??? arm,data-latency = <2 1 1>;
>>>>>>>>>>> ??????? ??? ??? prefetch-data = <1>;
>>>>>>>>>>> ??????? ??? ??? prefetch-instr = <1>;
>>>>>>>>>>> -??? ??? ??? arm,shared-override;
>>>>>>>>>>> ??????? ??? ??? arm,double-linefill = <1>;
>>>>>>>>>>> ??????? ??? ??? arm,double-linefill-incr = <0>;
>>>>>>>>>>> ??????? ??? ??? arm,double-linefill-wrap = <1>;
>>>>>>>>>>>
>>>>>>>>>> Do you use latest u-boot/master or some older version ? Which
>>>>>>>>>> one?
>>>>>>>>> sorry, i forget it.
>>>>>>>>>
>>>>>>>>> i use v2020.01
>>>>>>>> Should be OK I think. Hmmmmm, I suspect this is another fun with
>>>>>>>> the
>>>>>>>> ACTLR/CPACR registers, like
>>>>>>> 937db7188e3a5ab8f802eff9b57854189379667a .
>>>>>>>> Ley, any ideas ?
>>>>>>>>
>>>>>>> I just tested with
>>>>>>>
>>>>>>> 2020.07-rc4-00022-gbe79009f3b along with linux v5.7,
>>>>>>>
>>>>>>> and I no longer see the error.
>>>>>>>
>>>>>> Yes, I also just tested 2020.04 uboot and 5.4.23-lts kernel, also
>>>>>> didn't see this error.
>>>>>> What kernel version you are using?
>>>>>>
>>>>>> Regards
>>>>>> Ley Foon
>>>>> hello,
>>>>> i use kernel 4.14.126-rt62-ltsi.
>>>>>
>>>>> greetings
>>>>>
>>>>>
>>>> i try the u-boot version v2020.07-rc4 without the patch,
>>>> and everything seems okay, no error at boot.
>>>> i ve no idea why the error at boot time is gone with the 2020.07-rc4
>>>> version.
>>>> does anyone have any idea why?
>>>> thanks, greetings
>>> You can try git bisect between the two versions to find out which patch
>>> caused this.
>>>
>> This is the patch that fixed it:
>>
>> commit f62782fb2999dd8109a3ffe9ee0a51e54ab034ab
>> Author: Ley Foon Tan <ley.foon.tan@intel.com>
>> Date:?? Fri Apr 17 14:45:35 2020 +0800
>>
>> ???? cache: l2x0: Fix write to incorrect shared-override bit
>>
>> ???? The existing code write bit-0 for shared attribute override
>> enable bit.
>> ???? It should be bit-22 based on cache controller specification [1].
>>
>> ???? [1]
>> http://infocenter.arm.com/help/topic/com.arm.doc.ddi0246f/DDI0246F_l2c310_r3p2_trm.pdf
>>
>>
>> ???? Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
>>
>> Dinh
>>
> hello,
> thanks a lot!
> i try the git bisect method, i was? 13 builds away.
> next time i check first the changelog
> greetings

May want to check your usage of git bisect, it took me less than 10 builds.

Dinh