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Restore qemu performance fix for Ubuntu Noble (#9371)

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This restores a performance boost introduced via #6644, which appears to have been accidentally reverted in 021af5d. Additionally, a note was added to the config to indicate why that setting is important.

A write up for this issue was posted to the Armbian forums at https://forum.armbian.com/topic/57887-arm64-performance-regression-in-qemu/.
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tparys 2026-02-08 14:41:13 -05:00 committed by GitHub
parent 65d823f343
commit 3006a0826c
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4
config/sources/arm64.conf
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@ -37,4 +37,8 @@ else
display_alert "arch code" "ATF_COMPILE is 'no'" "debug"
fi
# IMPORTANT - Prevents ~5x slowdown caused by CVE-2023-4039 patchset, when
# emulating ARM64 software via qemu. Has no effect when run on native ARM64.
declare -gx QEMU_CPU="cortex-a53"
true # make sure to exit with 0 status; this protects against shortcircuits etc above.