From: Thomas Monjalon <thomas@monjalon.net>
To: anatoly.burakov@intel.com
Cc: dev@dpdk.org, david.marchand@redhat.com,
David Christensen <drc@linux.vnet.ibm.com>
Subject: Re: [dpdk-dev] [PATCH v4 1/1] vfio: modify spapr iommu support to use static window sizing
Date: Tue, 20 Oct 2020 14:05:08 +0200 [thread overview]
Message-ID: <1907482.5PRSjmWX3Q@thomas> (raw)
In-Reply-To: <20201015172305.105717-2-drc@linux.vnet.ibm.com>
Anatoly, please could you review this patch?
15/10/2020 19:23, David Christensen:
> The SPAPR IOMMU requires that a DMA window size be defined before memory
> can be mapped for DMA. Current code dynamically modifies the DMA window
> size in response to every new memory allocation which is potentially
> dangerous because all existing mappings need to be unmapped/remapped in
> order to resize the DMA window, leaving hardware holding IOVA addresses
> that are temporarily unmapped. The new SPAPR code statically assigns
> the DMA window size on first use, using the largest physical memory
> memory address when IOVA=PA and the highest existing memseg virtual
> address when IOVA=VA.
>
> Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
next prev parent reply other threads:[~2020-10-20 12:05 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 23:29 [dpdk-dev] [PATCH 0/2] vfio: change spapr DMA window sizing operation David Christensen
2020-04-29 23:29 ` [dpdk-dev] [PATCH 1/2] vfio: use ifdef's for ppc64 spapr code David Christensen
2020-04-30 11:14 ` Burakov, Anatoly
2020-04-30 16:22 ` David Christensen
2020-04-30 16:24 ` Burakov, Anatoly
2020-04-30 17:38 ` David Christensen
2020-05-01 8:49 ` Burakov, Anatoly
2020-04-29 23:29 ` [dpdk-dev] [PATCH 2/2] vfio: modify spapr iommu support to use static window sizing David Christensen
2020-04-30 11:34 ` Burakov, Anatoly
2020-04-30 17:36 ` David Christensen
2020-05-01 9:06 ` Burakov, Anatoly
2020-05-01 16:48 ` David Christensen
2020-05-05 14:57 ` Burakov, Anatoly
2020-05-05 16:26 ` David Christensen
2020-05-06 10:18 ` Burakov, Anatoly
2020-06-30 21:38 ` [dpdk-dev] [PATCH v2 0/1] vfio: change spapr DMA window sizing operation David Christensen
2020-06-30 21:38 ` [dpdk-dev] [PATCH v2 1/1] vfio: modify spapr iommu support to use static window sizing David Christensen
2020-08-10 21:07 ` [dpdk-dev] [PATCH v3 0/1] vfio: change spapr DMA window sizing operation David Christensen
2020-08-10 21:07 ` [dpdk-dev] [PATCH v3 1/1] vfio: modify spapr iommu support to use static window sizing David Christensen
2020-09-03 18:55 ` David Christensen
2020-09-17 11:13 ` Burakov, Anatoly
2020-10-07 12:49 ` Thomas Monjalon
2020-10-07 17:44 ` David Christensen
2020-10-08 9:39 ` Burakov, Anatoly
2020-10-12 19:19 ` David Christensen
2020-10-14 9:27 ` Burakov, Anatoly
2020-10-15 17:23 ` [dpdk-dev] [PATCH v4 0/1] vfio: change spapr DMA window sizing operation David Christensen
2020-10-15 17:23 ` [dpdk-dev] [PATCH v4 1/1] vfio: modify spapr iommu support to use static window sizing David Christensen
2020-10-20 12:05 ` Thomas Monjalon [this message]
2020-10-29 21:30 ` Thomas Monjalon
2020-11-02 11:04 ` Burakov, Anatoly
2020-11-03 22:05 ` [dpdk-dev] [PATCH v5 0/1] " David Christensen
2020-11-03 22:05 ` [dpdk-dev] [PATCH v5 1/1] " David Christensen
2020-11-04 19:43 ` Thomas Monjalon
2020-11-04 21:00 ` David Christensen
2020-11-04 21:02 ` Thomas Monjalon
2020-11-04 22:25 ` David Christensen
2020-11-05 7:12 ` Thomas Monjalon
2020-11-06 22:16 ` David Christensen
2020-11-07 9:58 ` Thomas Monjalon
2020-11-09 20:35 ` [dpdk-dev] [PATCH v5 0/1] " David Christensen
2020-11-09 20:35 ` [dpdk-dev] [PATCH v6 1/1] " David Christensen
2020-11-09 21:10 ` Thomas Monjalon
2020-11-10 17:41 ` [dpdk-dev] [PATCH v7 0/1] " David Christensen
2020-11-10 17:41 ` [dpdk-dev] [PATCH v7 1/1] " David Christensen
2020-11-10 17:43 ` [dpdk-dev] [PATCH v7 0/1] " David Christensen
2020-11-10 17:43 ` [dpdk-dev] [PATCH v7 1/1] " David Christensen
2020-11-13 8:39 ` Thomas Monjalon
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