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rk boot: boot arm64 under TCG with arm64.nomops - #182
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On the 7.3 A64 defconfig nightly 40256184683 the rucc kernel panicked in the kunit run. It stopped in
__memsetinmodule_memory_allocwhen it loadedcrypto/crypto_engine.ko. The SETM instruction wrote the page after the end of the module area, with no bytes left to set, and the kernel took a paging fault there.The same nightly shows that the fault is not the compiler's. In the rk cross-modules boots, the gcc-14 kernel with its own modules took the same fault in
__memsetwhen it loadedcrypto/deflate.ko. The rk mixed run 40264473995 got the fault again in the rucc kernel, at a different module. The likely cause is the FEAT_MOPS emulation of QEMU 8.2 under TCG.This change adds
arm64.nomopsto the kernel command line of every arm64 boot under TCG. The kernel then sets and copies memory with its own loops, on both kernels. Boots under KVM do not change.The A64 nightly 40268266012 runs on this branch to show that the fault is gone. I will merge after it passes.
Part of #109.