DPDK patches and discussions
 help / color / mirror / Atom feed
From: Thomas Monjalon <thomas@monjalon.net>
To: David Christensen <drc@linux.vnet.ibm.com>
Cc: dev@dpdk.org, anatoly.burakov@intel.com, david.marchand@redhat.com
Subject: Re: [dpdk-dev] [PATCH v7 1/1] vfio: modify spapr iommu support to use static window sizing
Date: Fri, 13 Nov 2020 09:39:43 +0100	[thread overview]
Message-ID: <10682021.SLBq4yNY96@thomas> (raw)
In-Reply-To: <20201110174332.12409-2-drc@linux.vnet.ibm.com>

10/11/2020 18:43, 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>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

Applied, thanks




      reply	other threads:[~2020-11-13  8:40 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
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 [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=10682021.SLBq4yNY96@thomas \
    --to=thomas@monjalon.net \
    --cc=anatoly.burakov@intel.com \
    --cc=david.marchand@redhat.com \
    --cc=dev@dpdk.org \
    --cc=drc@linux.vnet.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).