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From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy <aik@ozlabs.ru>
In-Reply-To: <20210827040706.517652-1-aik@ozlabs.ru>
References: <20210827040706.517652-1-aik@ozlabs.ru>
Subject: Re: [PATCH kernel] KVM: PPC: Fix clearing never mapped TCEs in
 realmode
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Date: Sat, 04 Sep 2021 11:01:31 +1000
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Cc: Leonardo Bras <leobras.c@gmail.com>, kvm-ppc@vger.kernel.org
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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

From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Date: Sat, 04 Sep 2021 01:01:31 +0000
Subject: Re: [PATCH kernel] KVM: PPC: Fix clearing never mapped TCEs in realmode
Message-Id: <163071729187.1779947.11008244687916528145.b4-ty@ellerman.id.au>
List-Id: <kvm-ppc.vger.kernel.org>
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To: linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Leonardo Bras <leobras.c@gmail.com>, kvm-ppc@vger.kernel.org

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