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fix(cpu-template): remove CPUID.07H.02H from GNR 5.10 template - #5690

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JamesC1305 merged 2 commits into
firecracker-microvm:mainfrom
JamesC1305:granite-rapids-template-fix-5.10
Feb 17, 2026
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fix(cpu-template): remove CPUID.07H.02H from GNR 5.10 template#5690
JamesC1305 merged 2 commits into
firecracker-microvm:mainfrom
JamesC1305:granite-rapids-template-fix-5.10

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Changes

Subleaf 07H.02H has been removed from GNR_TO_T2_5.10.json template.

Reason

Subleaf 07H.02H contains some extended feature information on granite rapids CPUs. Our template accidentally tried to mask this out despite it not being passed through by KVM on 5.10 hosts. This led to fatal errors when trying to spawn a VM using this template.

To fix, just remove subleaf 07H.02H from the GNR_TO_T2_5.10 template. This will not affect the security posture of this instance combination, it will just fix the error when applying the template

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the Apache 2.0 license. For more information on following Developer
Certificate of Origin and signing off your commits, please check
CONTRIBUTING.md.

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    build checks on all supported architectures.
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    automated style checks.
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  • This functionality cannot be added in rust-vmm.

Subleaf 07H.02H contains some extended feature information on granite
rapids CPUs. Our template accidentally tried to mask this out despite
it not being passed through by KVM on 5.10 hosts. This led to fatal
errors when trying to spawn a VM using this template.

To fix, just remove subleaf 07H.02H from the GNR_TO_T2_5.10 template.
This will not affect the security posture of this instance combination,
it will just fix the error when applying the template

Signed-off-by: James Curtis <jxcurtis@amazon.co.uk>
@codecov

codecov Bot commented Feb 17, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.13%. Comparing base (3acd97a) to head (dcd316e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #5690   +/-   ##
=======================================
  Coverage   83.13%   83.13%           
=======================================
  Files         277      277           
  Lines       29376    29376           
=======================================
  Hits        24421    24421           
  Misses       4955     4955           
Flag Coverage Δ
5.10-m5n.metal 83.43% <ø> (ø)
5.10-m6a.metal 82.75% <ø> (-0.01%) ⬇️
5.10-m6g.metal 80.12% <ø> (+<0.01%) ⬆️
5.10-m6i.metal 83.42% <ø> (-0.01%) ⬇️
5.10-m7a.metal-48xl 82.74% <ø> (ø)
5.10-m7g.metal 80.12% <ø> (ø)
5.10-m7i.metal-24xl 83.39% <ø> (-0.01%) ⬇️
5.10-m7i.metal-48xl 83.39% <ø> (-0.01%) ⬇️
5.10-m8g.metal-24xl 80.12% <ø> (-0.01%) ⬇️
5.10-m8g.metal-48xl 80.12% <ø> (-0.01%) ⬇️
6.1-m5n.metal 83.45% <ø> (-0.01%) ⬇️
6.1-m6a.metal 82.78% <ø> (+<0.01%) ⬆️
6.1-m6g.metal 80.12% <ø> (-0.01%) ⬇️
6.1-m6i.metal 83.45% <ø> (+<0.01%) ⬆️
6.1-m7a.metal-48xl 82.77% <ø> (-0.01%) ⬇️
6.1-m7g.metal 80.12% <ø> (ø)
6.1-m7i.metal-24xl 83.46% <ø> (-0.01%) ⬇️
6.1-m7i.metal-48xl 83.46% <ø> (ø)
6.1-m8g.metal-24xl 80.11% <ø> (-0.01%) ⬇️
6.1-m8g.metal-48xl 80.12% <ø> (ø)

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@JamesC1305
JamesC1305 enabled auto-merge (rebase) February 17, 2026 12:20
@JamesC1305
JamesC1305 merged commit 805ed9e into firecracker-microvm:main Feb 17, 2026
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3 participants