From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
mpe@ellerman.id.au
Cc: mahesh@linux.ibm.com, npiggin@gmail.com
Subject: Re: [PATCH v2] powerpc/mce: Fix access error in mce handler
Date: Sun, 19 Sep 2021 22:20:29 +1000 [thread overview]
Message-ID: <163205402970.1052045.3688302812661937958.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20210909064330.312432-1-ganeshgr@linux.ibm.com>
On Thu, 9 Sep 2021 12:13:30 +0530, Ganesh Goudar wrote:
> We queue an irq work for deferred processing of mce event
> in realmode mce handler, where translation is disabled.
> Queuing of the work may result in accessing memory outside
> RMO region, such access needs the translation to be enabled
> for an LPAR running with hash mmu else the kernel crashes.
>
> After enabling translation in mce_handle_error() we used to
> leave it enabled to avoid crashing here, but now with the
> commit 74c3354bc1d89 ("powerpc/pseries/mce: restore msr before
> returning from handler") we are restoring the MSR to disable
> translation.
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/mce: Fix access error in mce handler
https://git.kernel.org/powerpc/c/3a1e92d0896e928ac2a5b58962d05a39afef2e23
cheers
prev parent reply other threads:[~2021-09-19 12:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 6:43 [PATCH v2] powerpc/mce: Fix access error in mce handler Ganesh Goudar
2021-09-17 6:39 ` Daniel Axtens
2021-09-17 8:40 ` Ganesh
2021-09-19 12:20 ` Michael Ellerman [this message]
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