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 for <linuxppc-dev@lists.ozlabs.org>; Mon,  1 May 2017 12:58:51 +1000 (AEST)
In-Reply-To: <20170322042156.11756-2-aik@ozlabs.ru>
To: Alexey Kardashevskiy <aik@ozlabs.ru>, linuxppc-dev@lists.ozlabs.org
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: kvm@vger.kernel.org, Alexey Kardashevskiy <aik@ozlabs.ru>,
 kvm-ppc@vger.kernel.org, Alex Williamson <alex.williamson@redhat.com>,
 Paul Mackerras <paulus@samba.org>, David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [kernel, v11,
 01/10] powerpc/mmu: Add real mode support for IOMMU preregistered
 memory
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Date: Mon,  1 May 2017 12:58:51 +1000 (AEST)
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On Wed, 2017-03-22 at 04:21:47 UTC, Alexey Kardashevskiy wrote:
> This makes mm_iommu_lookup() able to work in realmode by replacing
> list_for_each_entry_rcu() (which can do debug stuff which can fail in
> real mode) with list_for_each_entry_lockless().
> 
> This adds realmode version of mm_iommu_ua_to_hpa() which adds
> explicit vmalloc'd-to-linear address conversion.
> Unlike mm_iommu_ua_to_hpa(), mm_iommu_ua_to_hpa_rm() can fail.
> 
> This changes mm_iommu_preregistered() to receive @mm as in real mode
> @current does not always have a correct pointer.
> 
> This adds realmode version of mm_iommu_lookup() which receives @mm
> (for the same reason as for mm_iommu_preregistered()) and uses
> lockless version of list_for_each_entry_rcu().
> 
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6b5c19c55266f6efd10ffac0e9f9f2

cheers