From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Michael Anderson <andmike@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH kernel v2 1/4] Revert "powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests"
Date: Mon, 16 Dec 2019 22:58:45 +0000 [thread overview]
Message-ID: <87a77rubbu.fsf@morokweng.localdomain> (raw)
In-Reply-To: <20191216041924.42318-2-aik@ozlabs.ru>
Hello Alexey,
Alexey Kardashevskiy <aik@ozlabs.ru> writes:
> From: Ram Pai <linuxram@us.ibm.com>
>
> This reverts commit edea902c1c1efb855f77e041f9daf1abe7a9768a.
>
> At the time the change allowed direct DMA ops for secure VMs; however
> since then we switched on using SWIOTLB backed with IOMMU (direct mapping)
> and to make this work, we need dma_iommu_ops which handles all cases
> including TCE mapping I/O pages in the presence of an IOMMU.
>
> Fixes: edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests")
> Signed-off-by: Ram Pai <linuxram@us.ibm.com>
> [aik: added "revert" and "fixes:"]
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
--
Thiago Jung Bauermann
IBM Linux Technology Center
WARNING: multiple messages have this Message-ID (diff)
From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Michael Anderson <andmike@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH kernel v2 1/4] Revert "powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests"
Date: Mon, 16 Dec 2019 19:58:45 -0300 [thread overview]
Message-ID: <87a77rubbu.fsf@morokweng.localdomain> (raw)
In-Reply-To: <20191216041924.42318-2-aik@ozlabs.ru>
Hello Alexey,
Alexey Kardashevskiy <aik@ozlabs.ru> writes:
> From: Ram Pai <linuxram@us.ibm.com>
>
> This reverts commit edea902c1c1efb855f77e041f9daf1abe7a9768a.
>
> At the time the change allowed direct DMA ops for secure VMs; however
> since then we switched on using SWIOTLB backed with IOMMU (direct mapping)
> and to make this work, we need dma_iommu_ops which handles all cases
> including TCE mapping I/O pages in the presence of an IOMMU.
>
> Fixes: edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests")
> Signed-off-by: Ram Pai <linuxram@us.ibm.com>
> [aik: added "revert" and "fixes:"]
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
--
Thiago Jung Bauermann
IBM Linux Technology Center
next prev parent reply other threads:[~2019-12-16 22:58 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 4:19 [PATCH kernel v2 0/4] Enable IOMMU support for pseries Secure VMs Alexey Kardashevskiy
2019-12-16 4:19 ` Alexey Kardashevskiy
2019-12-16 4:19 ` [PATCH kernel v2 1/4] Revert "powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests" Alexey Kardashevskiy
2019-12-16 4:19 ` Alexey Kardashevskiy
2019-12-16 22:58 ` Thiago Jung Bauermann [this message]
2019-12-16 22:58 ` Thiago Jung Bauermann
2020-01-06 23:33 ` Michael Ellerman
2020-01-06 23:33 ` Michael Ellerman
2019-12-16 4:19 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce for Alexey Kardashevskiy
2019-12-16 4:19 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm, hypertas-functions::hcall-multi-tce for DDW Alexey Kardashevskiy
2019-12-16 23:07 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce Thiago Jung Bauermann
2019-12-16 23:07 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm, hypertas-functions::hcall-multi-tce for DDW Thiago Jung Bauermann
2019-12-17 0:09 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce Alexey Kardashevskiy
2019-12-17 0:09 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce for DDW Alexey Kardashevskiy
2019-12-17 2:06 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce Thiago Jung Bauermann
2019-12-17 2:06 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm, hypertas-functions::hcall-multi-tce for DDW Thiago Jung Bauermann
2020-01-02 22:02 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce Ram Pai
2020-01-02 22:02 ` [PATCH kernel v2 2/4] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce for DDW Ram Pai
2019-12-16 4:19 ` [PATCH kernel v2 3/4] powerpc/pseries/iommu: Separate FW_FEATURE_MULTITCE to put/stuff features Alexey Kardashevskiy
2019-12-16 4:19 ` Alexey Kardashevskiy
2019-12-16 23:19 ` Thiago Jung Bauermann
2019-12-16 23:19 ` Thiago Jung Bauermann
2020-01-02 22:24 ` Ram Pai
2020-01-02 22:24 ` Ram Pai
2019-12-16 4:19 ` [PATCH kernel v2 4/4] powerpc/pseries/svm: Allow IOMMU to work in SVM Alexey Kardashevskiy
2019-12-16 4:19 ` Alexey Kardashevskiy
2019-12-16 23:23 ` Thiago Jung Bauermann
2019-12-16 23:23 ` Thiago Jung Bauermann
2020-01-02 22:21 ` Ram Pai
2020-01-02 22:21 ` Ram Pai
2020-01-03 0:08 ` David Gibson
2020-01-03 0:08 ` David Gibson
2020-01-03 2:06 ` Ram Pai
2020-01-03 2:06 ` Ram Pai
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