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--_000_AS8PR08MB6806ECD6A1C4F920CA5FC82884239AS8PR08MB6806eurp_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

Hi Laszl= o, Liming,

&nb= sp;

Apologie= s for not doing it earlier. I was not sure if it was within my right to mer= ge the change.

I will m= erge this in the next 2 hours.

&nb= sp;

Regards,=

&nb= sp;

Sami Muj= awar

&nb= sp;

&nb= sp;

From: Laszlo Ersek <l= ersek@redhat.com>
Date: Thursday, 27 May 2021 at 09:50
To: gaoliming <gaoliming@byosoft.com.cn>, devel@edk2.groups.i= o <devel@edk2.groups.io>, Sami Mujawar <Sami.Mujawar@arm.com> Cc: ardb@kernel.org <ardb@kernel.org>, leif@nuviainc.com <= leif@nuviainc.com>, Matteo Carlini <Matteo.Carlini@arm.com>, Andre= as Sandberg <Andreas.Sandberg@arm.com>, Joey Gouly <Joey.Gouly@arm= .com>, nd <nd@arm.com>
Subject: Re: =BB=D8=B8=B4: [edk2-devel] [edk2-devel202105 PATCH v2 1/1] ArmPkg/= ArmGic: Fix maximum number of interrupts in GICv3

Hi Liming,

On 05/27/21 04:32, gaoliming wrote:
> If no objection, I will merge this patch today. Then, tomorrow, I wil= l create stable tag 202105.

yes, please do that -- TBH, I thought Sami would merge it sooner, as
Sami does have maintainer access through DynamicTablesPkg and
StandaloneMmPkg.

Thanks!
Laszlo

>
> Thanks
> Liming
>> -----=D3=CA=BC=FE=D4= = =AD=BC=FE-----
>> = =B7=A2=BC=FE=C8= =CB: devel@edk2.groups.io <devel@edk2.groups.io> =B4=FA=B1=ED gaol= iming
>> = =B7=A2=CB=CD=CA=B1=BC= =E4: 2021=C4=EA5=D4=C226=C8=D5 10:22
>> =CA=D5=BC=FE=C8= = =CB: devel@edk2.groups.io; lersek@redhat.com;
>> sami.mujawar@arm.com
>> =B3=AD=CB=CD: ardb@kernel.org; leif@nuviainc.com; Matteo.Carlini@arm.com;
>> Andreas.Sandberg@arm.com; joey.gouly@arm.com; nd@arm.com
>> =D6=F7=CC=E2: =BB=D8=B8=B4: [ed= k2-devel] [edk2-devel202105 PATCH v2 1/1] ArmPkg/ArmGic:
>> Fix maximum number of interrupts in GICv3
>>
>> Laszlo, Ard, Sami:
>>   I am OK to merge this patch for stable tag 202105. >>
>> Thanks
>> Liming
>>> -----=D3=CA=BC= =FE=D4=AD=BC=FE-----
>>> =BC=FE=C8= =CB: devel@edk2.groups.io <devel@edk2.groups.io> =B4=FA=B1=ED Lasz= lo
>> Ersek
>>> =CB=CD=CA=B1=BC= = =E4: 2021=C4=EA5=D4=C225=C8=D5 19:55
>>> =CA=D5=BC= =FE=C8=CB: devel@edk2.groups.io; sami.mujawar@arm.com
>>> =B3=AD=CB= =CD: ardb@kernel.org; leif@nuviainc.com; Matteo.Carlini@arm.com; >>> Andreas.Sandberg@arm.com; joey.gouly@arm.com; nd@arm.com
>>> =D6=F7=CC=E2: Re: [edk2-devel] [edk2-devel202105 PATCH v2 1/1] ArmPkg/ArmGic:
>>> Fix maximum number of interrupts in GICv3
>>>
>>> Hi Sami,
>>>
>>> On 05/24/21 15:01, Sami Mujawar wrote:
>>>> From: Andreas Sandberg <andreas.sandberg@arm.com> >>>>
>>>> Bugzilla: 3415 (https://bugzilla.tianocore.org/show_bug.cgi?id=3D3= 415)
>>>>
>>>> The GICv3 architecture supports up to 1020 ordinary inter= rupt
>>>> lines. The actual number of interrupts supported is descr= ibed by the
>>>> ITLinesNumber field in the GICD_TYPER register. The total= number of
>>>> implemented registers is normally calculated as
>>>> 32*(ITLinesNumber+1). However, maximum value (0x1f) is a = special case
>>>> since that would indicate that 1024 interrupts are implem= ented.
>>>>
>>>> Add handling for this special case in ArmGicGetMaxNumInte= rrupts.
>>>>
>>>> Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.= com>
>>>> Signed-off-by: Joey Gouly <joey.gouly@arm.com>
>>>> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com><= br> >>>> Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
>>>> ---
>>>> The changes can be seen at:
>>>> https://github.com/samimujawar/edk2/tree/1396_gic_max_num_intr_v2
>>>>
>>>> Notes:
>>>>     v2:
>>>>       - Fix comment style.<= br> >>> [Laszlo]
>>>>       - Updated comment sty= le.
>>> [Sami]
>>>>
>>>>  ArmPkg/Drivers/ArmGic/ArmGicLib.c | 11 +++++++++--<= br> >>>>  1 file changed, 9 insertions(+), 2 deletions(-)
>>>
>>> I think this patch should be merged really soon, as long as A= rd agrees.
>>>
>>> Thanks,
>>> Laszlo
>>>
>>>>
>>>> diff --git a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
>>> b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
>>>> index
>>>
>> 6b01c88206ad8adef3100dd44c0d57660db77783..bd4b5edb903f3846f4f0e43=
>>> 1f93e001f01cd9e7d 100644
>>>> --- a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
>>>> +++ b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
>>>> @@ -1,6 +1,6 @@
>>>>  /** @file
>>>>  *
>>>> -*  Copyright (c) 2011-2018, ARM Limited. All rights= reserved.
>>>> +*  Copyright (c) 2011-2021, Arm Limited. All rights= reserved.
>>>>  *
>>>>  *  SPDX-License-Identifier: BSD-2-Clause-Paten= t
>>>>  *
>>>> @@ -120,7 +120,14 @@ ArmGicGetMaxNumInterrupts (
>>>>    IN  INTN    &n= bsp;     GicDistributorBase
>>>>    )
>>>>  {
>>>> -  return 32 * ((MmioRead32 (GicDistributorBase + AR= M_GIC_ICDICTR) &
>>> 0x1F) + 1);
>>>> +  UINTN ItLines;
>>>> +
>>>> +  ItLines =3D MmioRead32 (GicDistributorBase + ARM_= GIC_ICDICTR) &
>>> 0x1F;
>>>> +
>>>> +  //
>>>> +  // Interrupt ID 1020-1023 are reserved.
>>>> +  //
>>>> +  return (ItLines =3D=3D 0x1f) ? 1020 : 32 * (ItLin= es + 1);
>>>>  }
>>>>
>>>>  VOID
>>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>
>
>

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