Re: [edk2-devel] [PATCH 0/1] OvmfPkg/PlatformInitLib: catch QEMU's CPU hotplug reg block regression

["Michael D Kinney" <michael.d.kinney@intel.com>]

Hi Laszlo,

Unit test code coverage was enabled just a couple days ago in CI.  Looks like you uncovered a corner case that was missed that should not generate a CI failure.

I have asked Gua to investigate.

Thanks,

Mike

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Laszlo Ersek
> Sent: Wednesday, January 4, 2023 7:13 AM
> To: devel@edk2.groups.io
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>; Brijesh Singh <brijesh.singh@amd.com>; Aktas, Erdem <erdemaktas@google.com>; Gerd
> Hoffmann <kraxel@redhat.com>; James Bottomley <jejb@linux.ibm.com>; Yao, Jiewen <jiewen.yao@intel.com>; Justen, Jordan L
> <jordan.l.justen@intel.com>; Xu, Min M <min.m.xu@intel.com>; Boeuf, Sebastien <sebastien.boeuf@intel.com>; Tom Lendacky
> <thomas.lendacky@amd.com>
> Subject: [edk2-devel] [PATCH 0/1] OvmfPkg/PlatformInitLib: catch QEMU's CPU hotplug reg block regression
> 
> Repo:       https://pagure.io/lersek/edk2.git
> Branch:     cpuhp-reg-catch-4250
> Test build: https://github.com/tianocore/edk2/pull/3853
> Bugzilla:   https://bugzilla.tianocore.org/show_bug.cgi?id=4250
> 
> NOTE: the test build linked above (in the github.com CI env) *failed*.
> That's because the CI environment is affected by this very QEMU bug!
> 
> Namely, the following checks failed -- due to the intentional hang
> introduced in this patch:
> 
> - PlatformCI_OvmfPkg_Ubuntu_GCC5_PR (12 tests)
> - PlatformCI_OvmfPkg_Windows_VS2019_PR (11 tests)
> 
> (The Build_VS2019_TARGET_CODE_COVERAGE and
> Build_GCC5_TARGET_CODE_COVERAGE tests also failed, but those seem bogus
> to me.)
> 
> All 12+11=23 PlatformCI_OvmfPkg_* checks failed due to timeout, and the
> firmware logs of the DEBUG and NOOPT builds end with:
> 
> > INFO - PlatformMaxCpuCountInitialization: Broken CPU hotplug register block: Present=0 Possible=1.
> > INFO - PlatformMaxCpuCountInitialization: Switch QEMU's acceleration from TCG to KVM, or update QEMU.
> > INFO - PlatformMaxCpuCountInitialization: Refer to <https://bugzilla.tianocore.org/show_bug.cgi?id=4250>.
> > INFO - ASSERT /home/vsts/work/1/s/OvmfPkg/Library/PlatformInitLib/Platform.c(574): ((BOOLEAN)(0==1))
> 
> So I'm not proposing to merge this immediately; something must be fixed
> first:
> 
> - use KVM in the CI env, or
> 
> - delay this patch until my QEMU fix is merged, and a new release is
>   made, and the new QEMU release is packaged by the distros, and the new
>   distro packages are picked up by github.com CI.
> 
> Suggestions?
> 
> Thanks,
> Laszlo
> 
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Erdem Aktas <erdemaktas@google.com>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: James Bottomley <jejb@linux.ibm.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Cc: Min Xu <min.m.xu@intel.com>
> Cc: Sebastien Boeuf <sebastien.boeuf@intel.com>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> 
> Laszlo Ersek (1):
>   OvmfPkg/PlatformInitLib: catch QEMU's CPU hotplug reg block regression
> 
>  OvmfPkg/Library/PlatformInitLib/Platform.c | 34 ++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> 
> 
> 
>