Re: [syzbot ci] Re: KVM: x86: Unify L1TF flushing under per-CPU variable

[Brendan Jackman]

On Tue Oct 14, 2025 at 6:13 AM UTC, syzbot ci wrote:
> BUG: using __this_cpu_write() in preemptible code in x86_emulate_instruction

Ah. And now I realise I never booted my debug config on an actual
Skylake host, I'd better do that, presumably running the KVM selftests
with DEBUG_PREEMPT etc would have been enough to catch this earlier.

Anyway, I guest we just want to use vcpu->arch.last_vmentry_cpu instead
of smp_processor_id()?