From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Leonardo Bras <leobras.c@gmail.com>, kvm-ppc@vger.kernel.org
Subject: Re: [PATCH kernel] KVM: PPC: Fix clearing never mapped TCEs in realmode
Date: Sat, 04 Sep 2021 01:01:31 +0000 [thread overview]
Message-ID: <163071729187.1779947.11008244687916528145.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20210827040706.517652-1-aik@ozlabs.ru>
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
prev parent reply other threads:[~2021-09-04 1:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-27 4:07 [PATCH kernel] KVM: PPC: Fix clearing never mapped TCEs in realmode Alexey Kardashevskiy
2021-08-31 20:30 ` Leonardo Brás
2021-09-04 1:01 ` Michael Ellerman [this message]
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