# Re: \[PATCH v3\] KVM: PPC: Book3S HV: Mask off LPCR\_MER for a vCPU before running it to avoid spurious interrupts

- From: Michael Ellerman \<mpe@ellerman.id.au\>
- Date: 2024-11-17 12:08:39 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2024/11/2828041
- Thread: https://ratatoskr.run/linuxppc-dev/2024/10/2801644/t.md

```text
Gautam Menghani [ref] writes:
> Running a L2 vCPU (see [1] for terminology) with LPCR_MER bit set and no
> pending interrupts results in that L2 vCPU getting an infinite flood of
> spurious interrupts. The 'if check' in kvmhv_run_single_vcpu() sets the
> LPCR_MER bit if there are pending interrupts.

Applied to powerpc/fixes.

[1/1] KVM: PPC: Book3S HV: Mask off LPCR_MER for a vCPU before running it to avoid spurious interrupts
      https://git.kernel.org/powerpc/c/a373830f96db288a3eb43a8692b6bcd0bd88dfe1

cheers

```