[PATCH] KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors

[Michael Ellerman]

On Wed, 2 Jun 2021 14:04:41 +1000, Nicholas Piggin wrote:
> The POWER9 vCPU TLB management code assumes all threads in a core share
> a TLB, and that TLBIEL execued by one thread will invalidate TLBs for
> all threads. This is not the case for SMT8 capable POWER9 and POWER10
> (big core) processors, where the TLB is split between groups of threads.
> This results in TLB multi-hits, random data corruption, etc.
> 
> Fix this by introducing cpu_first_tlb_thread_sibling etc., to determine
> which siblings share TLBs, and use that in the guest TLB flushing code.
> 
> [...]

Applied to powerpc/topic/ppc-kvm.

[1/1] KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors
      https://git.kernel.org/powerpc/c/77bbbc0cf84834ed130838f7ac1988567f4d0288

cheers