Re: [PATCH kernel] KVM: PPC: Fix clearing never mapped TCEs in realmode
Michael Ellerman <[email protected]>
| Newsgroups | org.kernel.vger.kvm-ppc,org.ozlabs.lists.linuxppc-dev |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 27 Aug 2021 14:07:06 +1000, Alexey Kardashevskiy wrote:
> Since e1a1ef84cd07, pages for TCE tables for KVM guests are allocated
> only when needed. This allows skipping any update when clearing TCEs.
> This works mostly fine as TCE updates are handled when MMU is enabled.
> The realmode handlers fail with H_TOO_HARD when pages are not yet
> allocated except when clearing a TCE in which case KVM prints a warning
> but proceeds to dereference a NULL pointer which crashes the host OS.
>
> [...]
Applied to powerpc/next.
[1/1] KVM: PPC: Fix clearing never mapped TCEs in realmode
https://git.kernel.org/powerpc/c/1d78dfde33a02da1d816279c2e3452978b7abd39
cheers