linux-kernel - Re: Fast model boot failure with Linux next-20250312

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Message-ID: <20250321125732.6def5eca@donnerap.manchester.arm.com>
Date: Fri, 21 Mar 2025 12:57:32 +0000
From: Andre Przywara <andre.przywara@....com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: Mark Rutland <mark.rutland@....com>, open list
 <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, Linux ARM
 <linux-arm-kernel@...ts.infradead.org>, kvmarm@...ts.linux.dev, Anshuman
 Khandual <anshuman.khandual@....com>, Rob Herring <robh@...nel.org>,
 Catalin Marinas <catalin.marinas@....com>, Mark Brown <broonie@...nel.org>,
 Aishwarya TCV <aishwarya.tcv@....com>, Anders Roxell
 <anders.roxell@...aro.org>, Dan Carpenter <dan.carpenter@...aro.org>, Arnd
 Bergmann <arnd@...db.de>
Subject: Re: Fast model boot failure with Linux next-20250312

On Thu, 20 Mar 2025 16:03:32 +0530
Naresh Kamboju <naresh.kamboju@...aro.org> wrote:

Hi,

> On Wed, 19 Mar 2025 at 20:25, Mark Rutland <mark.rutland@....com> wrote:
> >
> > On Wed, Mar 19, 2025 at 08:07:47PM +0530, Naresh Kamboju wrote:  
> > > Regressions on the arm64 Fast Model (FVP-AEMvA) caused boot failures starting
> > > with Linux next-20250312 and persisting through next-20250319.
> > >
> > > First seen on the next-20250312
> > >  Good: next-20250311
> > >  Bad:  next-20250312 .. next-20250319
> > >
> > > Regressions found on FVP:
> > >  - boot
> > >
> > > Regression Analysis:
> > >  - New regression? Yes
> > >  - Reproducible? Yes
> > >
> > > Boot regression: Fast model boot failure with Linux next-20250312
> > > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> > >
> > > Anders bisected this to this commit id,
> > >
> > > # first bad commit:
> > >   [858c7bfcb35e1100b58bb63c9f562d86e09418d9]
> > >   arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9
> > >
> > > NOTE:
> > >   LKFT is currently running FVP Fast Models version 11.24.
> > >   Planned upgrade to the Fast Models version 11.28 in this sprint.  
> >
> > What firmware (and version therof) are you running within the model?  
> 
> Fast Models [11.24.11 (Nov 29 2023)]
> Booting Trusted Firmware
> BL1: v2.9(release):v2.9.0
> BL2: v2.9(release):v2.9.0
> BL31: v2.9(release):v2.9.0
> UEFI firmware (version  built at 22:31:25 on May 26 2023)
> UEFI v2.70 (EDK II, 0x00010000)
> 
> We need to update the firmware version at our end.

Oh yes, please, v2.9.0 is quite old by now, especially for a moving target
like the FVP, and when enabling new architecture features.
FWIW, after Anshuman pointed me the problem, I made a patch for TF-A to
enable PMUv3p9:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/35884
You would need that for this Linux commit here to work.
FEAT_FGT2 should be enabled already by default for the FVP.

Please feel free to leave a comment at the TF-A gerrit, stating that you
need the patch, that should accelerate the upstream process.

Cheers,
Andre

> > For example, if the EL3 firmware lacks support for FEAT_FGT2 or
> > FEAT_PMUv3p9, the kernel will trap to EL3 early during boot and die.
> >
> > It would be really helpful if you could capture that in the report in
> > future.
> >
> > Mark.
> >  
> > >
> > > ## Boot log
> > >   <No crash log on the console>
> > >
> > > ## Source
> > > * Kernel version: 6.14.0-rc7
> > > * Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> > > * Git sha: ff7f9b199e3f4cc7d61df5a9a26a7cbb5c1492e6
> > > * Git describe: next-20250319
> > > * Project details:
> > > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250319
> > > * DUT: arm64 Fast Model (FVP-AEMvA)
> > > * Toolchains: gcc-13 and clang-20
> > >
> > > ## Build
> > > * Build log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250319/testrun/27675691/suite/boot/test/gcc-13-lkftconfig/log
> > > * Build history:
> > > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250319/testrun/27675685/suite/boot/test/gcc-13-lkftconfig/history/
> > > * Build details:
> > > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250319/testrun/27675691/suite/boot/test/gcc-13-lkftconfig/
> > > * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2uX2EtC2pQdmVZ7ccoyhoi01Yy0/
> > > * Kernel config:
> > > https://storage.tuxsuite.com/public/linaro/lkft/builds/2uX2EtC2pQdmVZ7ccoyhoi01Yy0/config
> > >
> > > --
> > > Linaro LKFT
> > > https://lkft.linaro.org
> > >  
> 
> - Naresh
>