From: David Gibson <david@gibson.dropbear.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: linuxppc-dev@lists.ozlabs.org,
Alex Williamson <alex.williamson@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Gavin Shan <gwshan@linux.vnet.ibm.com>,
Paul Mackerras <paulus@samba.org>,
Wei Yang <weiyang@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH kernel v12 27/34] powerpc/powernv: Implement multilevel TCE tables
Date: Tue, 9 Jun 2015 13:57:16 +1000 [thread overview]
Message-ID: <20150609035716.GB11000@voom.redhat.com> (raw)
In-Reply-To: <1433486126-23551-28-git-send-email-aik@ozlabs.ru>
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On Fri, Jun 05, 2015 at 04:35:19PM +1000, Alexey Kardashevskiy wrote:
> TCE tables might get too big in case of 4K IOMMU pages and DDW enabled
> on huge guests (hundreds of GB of RAM) so the kernel might be unable to
> allocate contiguous chunk of physical memory to store the TCE table.
>
> To address this, POWER8 CPU (actually, IODA2) supports multi-level
> TCE tables, up to 5 levels which splits the table into a tree of
> smaller subtables.
>
> This adds multi-level TCE tables support to
> pnv_pci_ioda2_table_alloc_pages() and pnv_pci_ioda2_table_free_pages()
> helpers.
>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2015-06-09 4:57 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-05 6:34 [PATCH kernel v12 00/34] powerpc/iommu/vfio: Enable Dynamic DMA windows Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 01/34] powerpc/eeh/ioda2: Use device::iommu_group to check IOMMU group Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 02/34] powerpc/iommu/powernv: Get rid of set_iommu_table_base_and_group Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 03/34] powerpc/powernv/ioda: Clean up IOMMU group registration Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 04/34] powerpc/iommu: Put IOMMU group explicitly Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 05/34] powerpc/iommu: Always release iommu_table in iommu_free_table() Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 06/34] vfio: powerpc/spapr: Move page pinning from arch code to VFIO IOMMU driver Alexey Kardashevskiy
2015-06-05 6:34 ` [PATCH kernel v12 07/34] vfio: powerpc/spapr: Check that IOMMU page is fully contained by system page Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 08/34] vfio: powerpc/spapr: Use it_page_size Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 09/34] vfio: powerpc/spapr: Move locked_vm accounting to helpers Alexey Kardashevskiy
2015-06-09 4:22 ` David Gibson
2015-06-05 6:35 ` [PATCH kernel v12 10/34] vfio: powerpc/spapr: Disable DMA mappings on disabled container Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 11/34] vfio: powerpc/spapr: Moving pinning/unpinning to helpers Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 12/34] vfio: powerpc/spapr: Rework groups attaching Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 13/34] powerpc/powernv: Do not set "read" flag if direction==DMA_NONE Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 14/34] powerpc/iommu: Move tce_xxx callbacks from ppc_md to iommu_table Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 15/34] powerpc/powernv/ioda/ioda2: Rework TCE invalidation in tce_build()/tce_free() Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 16/34] powerpc/spapr: vfio: Replace iommu_table with iommu_table_group Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 17/34] powerpc/spapr: vfio: Switch from iommu_table to new iommu_table_group Alexey Kardashevskiy
2015-06-09 2:36 ` David Gibson
2015-06-09 5:59 ` [PATCH kernel] powerpc/pseries: Fix compile error when CONFIG_IOMMU_API if off Alexey Kardashevskiy
2015-06-09 12:23 ` [PATCH kernel v12 17/34] powerpc/spapr: vfio: Switch from iommu_table to new iommu_table_group Michael Ellerman
2015-06-10 3:08 ` [PATCH kernel] powerpc/powernv: Fix crash when CONFIG_IOMMU_API is off Alexey Kardashevskiy
2015-06-10 7:33 ` [kernel, v12, 17/34] powerpc/spapr: vfio: Switch from iommu_table to new iommu_table_group Michael Ellerman
2015-06-11 4:28 ` [PATCH kernel v12.2] powerpc/powernv: Fix crash when CONFIG_IOMMU_API is off Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 18/34] vfio: powerpc/spapr/iommu/powernv/ioda2: Rework IOMMU ownership control Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 19/34] powerpc/iommu: Fix IOMMU ownership control functions Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 20/34] powerpc/powernv/ioda2: Move TCE kill register address to PE Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 21/34] powerpc/powernv/ioda2: Add TCE invalidation for all attached groups Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 22/34] powerpc/powernv: Implement accessor to TCE entry Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 23/34] powerpc/iommu/powernv: Release replaced TCE Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 24/34] powerpc/powernv/ioda2: Rework iommu_table creation Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 25/34] powerpc/powernv/ioda2: Introduce helpers to allocate TCE pages Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 26/34] powerpc/powernv/ioda2: Introduce pnv_pci_ioda2_set_window Alexey Kardashevskiy
2015-06-09 4:23 ` David Gibson
2015-06-05 6:35 ` [PATCH kernel v12 27/34] powerpc/powernv: Implement multilevel TCE tables Alexey Kardashevskiy
2015-06-09 3:57 ` David Gibson [this message]
2015-06-05 6:35 ` [PATCH kernel v12 28/34] vfio: powerpc/spapr: powerpc/powernv/ioda: Define and implement DMA windows API Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 29/34] powerpc/powernv/ioda2: Use new helpers to do proper cleanup on PE release Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 30/34] powerpc/iommu/ioda2: Add get_table_size() to calculate the size of future table Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 31/34] vfio: powerpc/spapr: powerpc/powernv/ioda2: Use DMA windows API in ownership control Alexey Kardashevskiy
2015-06-05 6:35 ` [PATCH kernel v12 32/34] powerpc/mmu: Add userspace-to-physical addresses translation cache Alexey Kardashevskiy
2015-06-09 4:05 ` David Gibson
2015-06-05 6:35 ` [PATCH kernel v12 33/34] vfio: powerpc/spapr: Register memory and define IOMMU v2 Alexey Kardashevskiy
2015-06-09 4:21 ` David Gibson
2015-06-05 6:35 ` [PATCH kernel v12 34/34] vfio: powerpc/spapr: Support Dynamic DMA windows Alexey Kardashevskiy
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