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From: Joerg Roedel <joro@8bytes.org>
To: Matthew Rosato <mjrosato@linux.ibm.com>
Cc: linux-s390@vger.kernel.org, farman@linux.ibm.com,
	kvm@vger.kernel.org, schnelle@linux.ibm.com, cohuck@redhat.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	alex.williamson@redhat.com, jgg@nvidia.com,
	gerald.schaefer@linux.ibm.com, borntraeger@linux.ibm.com,
	will@kernel.org
Subject: Re: [PATCH] iommu/s390: tolerate repeat attach_dev calls
Date: Fri, 20 May 2022 09:57:44 +0200	[thread overview]
Message-ID: <YodJ+OwxsP5PPO3V@8bytes.org> (raw)
In-Reply-To: <20220519182929.581898-1-mjrosato@linux.ibm.com>

On Thu, May 19, 2022 at 02:29:29PM -0400, Matthew Rosato wrote:
> Since commit 0286300e6045 ("iommu: iommu_group_claim_dma_owner() must
> always assign a domain") s390-iommu will get called to allocate multiple
> unmanaged iommu domains for a vfio-pci device -- however the current
> s390-iommu logic tolerates only one.  Recognize that multiple domains can
> be allocated and handle switching between DMA or different iommu domain
> tables during attach_dev.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>  drivers/iommu/s390-iommu.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)

Applied to the vfio-notifier-fix topic branch, thanks.

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iommu@lists.linux-foundation.org
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Matthew Rosato <mjrosato@linux.ibm.com>
Cc: jgg@nvidia.com, will@kernel.org, alex.williamson@redhat.com,
	cohuck@redhat.com, borntraeger@linux.ibm.com,
	schnelle@linux.ibm.com, gerald.schaefer@linux.ibm.com,
	farman@linux.ibm.com, iommu@lists.linux-foundation.org,
	linux-s390@vger.kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/s390: tolerate repeat attach_dev calls
Date: Fri, 20 May 2022 09:57:44 +0200	[thread overview]
Message-ID: <YodJ+OwxsP5PPO3V@8bytes.org> (raw)
In-Reply-To: <20220519182929.581898-1-mjrosato@linux.ibm.com>

On Thu, May 19, 2022 at 02:29:29PM -0400, Matthew Rosato wrote:
> Since commit 0286300e6045 ("iommu: iommu_group_claim_dma_owner() must
> always assign a domain") s390-iommu will get called to allocate multiple
> unmanaged iommu domains for a vfio-pci device -- however the current
> s390-iommu logic tolerates only one.  Recognize that multiple domains can
> be allocated and handle switching between DMA or different iommu domain
> tables during attach_dev.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>  drivers/iommu/s390-iommu.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)

Applied to the vfio-notifier-fix topic branch, thanks.


  parent reply	other threads:[~2022-05-20  7:57 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-19 18:29 [PATCH] iommu/s390: tolerate repeat attach_dev calls Matthew Rosato
2022-05-19 18:29 ` Matthew Rosato
2022-05-19 18:30 ` Matthew Rosato
2022-05-19 18:30   ` Matthew Rosato
2022-05-19 22:58 ` Jason Gunthorpe via iommu
2022-05-19 22:58   ` Jason Gunthorpe
2022-05-20  7:57 ` Joerg Roedel [this message]
2022-05-20  7:57   ` Joerg Roedel
2022-05-20 10:30 ` Niklas Schnelle
2022-05-20 10:30   ` Niklas Schnelle

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