From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Oleksandr Andrushchenko <andr2000@gmail.com>
Cc: <Rahul.Singh@arm.com>, <Bertrand.Marquis@arm.com>,
<julien.grall@arm.com>, <jbeulich@suse.com>,
<sstabellini@kernel.org>, <xen-devel@lists.xenproject.org>,
<iwj@xenproject.org>, <wl@xen.org>,
Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: Re: [PATCH 04/10] [WORKAROUND] xen/arm: Update hwdom's p2m to trap ECAM space
Date: Wed, 11 Nov 2020 15:44:22 +0100 [thread overview]
Message-ID: <20201111144422.z2hi3ineg6qwbxi4@Air-de-Roger> (raw)
In-Reply-To: <20201109125031.26409-5-andr2000@gmail.com>
On Mon, Nov 09, 2020 at 02:50:25PM +0200, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>
> Host bridge controller's ECAM space is mapped into Domain-0's p2m,
> thus it is not possible to trap the same for vPCI via MMIO handlers.
> For this to work we need to unmap those mappings in p2m.
>
> TODO (Julien): It would be best if we avoid the map/unmap operation.
> So, maybe we want to introduce another way to avoid the mapping.
> Maybe by changing the type of the controller to "PCI_HOSTCONTROLLER"
> and checking if this is a PCI hostcontroller avoid the mapping.
I know very little about Arm to be able to provide meaningful comments
here. I agree that creating the maps just to remove them afterwards is
not the right approach, we should instead avoid those mappings from
being created in the first place.
Roger.
next prev parent reply other threads:[~2020-11-11 14:44 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 12:50 [PATCH 00/10] [RFC] ARM PCI passthrough configuration and vPCI Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 01/10] pci/pvh: Allow PCI toolstack code run with PVH domains on ARM Oleksandr Andrushchenko
2020-11-11 12:31 ` [SUSPECTED SPAM][PATCH " Roger Pau Monné
2020-11-11 13:10 ` Oleksandr Andrushchenko
2020-11-11 13:55 ` Roger Pau Monné
2020-11-11 14:12 ` Oleksandr Andrushchenko
2020-11-11 14:21 ` Roger Pau Monné
2020-11-09 12:50 ` [PATCH 02/10] arm/pci: Maintain PCI assignable list Oleksandr Andrushchenko
2020-11-11 13:53 ` Roger Pau Monné
2020-11-11 14:38 ` Oleksandr Andrushchenko
2020-11-11 15:03 ` Roger Pau Monné
2020-11-11 15:13 ` Oleksandr Andrushchenko
2020-11-11 15:25 ` Jan Beulich
2020-11-11 15:28 ` Oleksandr Andrushchenko
2020-11-11 14:54 ` Jan Beulich
2020-11-12 12:53 ` Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 03/10] xen/arm: Setup MMIO range trap handlers for hardware domain Oleksandr Andrushchenko
2020-11-11 14:39 ` Roger Pau Monné
2020-11-11 14:42 ` Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 04/10] [WORKAROUND] xen/arm: Update hwdom's p2m to trap ECAM space Oleksandr Andrushchenko
2020-11-11 14:44 ` Roger Pau Monné [this message]
2020-11-12 12:54 ` Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 05/10] xen/arm: Process pending vPCI map/unmap operations Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 06/10] vpci: Make every domain handle its own BARs Oleksandr Andrushchenko
2020-11-12 9:40 ` Roger Pau Monné
2020-11-12 13:16 ` Oleksandr Andrushchenko
2020-11-12 14:46 ` Roger Pau Monné
2020-11-13 6:32 ` Oleksandr Andrushchenko
2020-11-13 6:48 ` Oleksandr Andrushchenko
2020-11-13 10:25 ` Jan Beulich
2020-11-13 10:36 ` Julien Grall
2020-11-13 10:53 ` Jan Beulich
2020-11-13 11:06 ` Julien Grall
2020-11-13 11:26 ` Jan Beulich
2020-11-13 11:53 ` Julien Grall
2020-11-13 10:46 ` Oleksandr Andrushchenko
2020-11-13 10:50 ` Jan Beulich
2020-11-13 11:02 ` Oleksandr Andrushchenko
2020-11-13 11:35 ` Jan Beulich
2020-11-13 12:41 ` Oleksandr Andrushchenko
2020-11-13 14:23 ` Jan Beulich
2020-11-13 14:32 ` Oleksandr Andrushchenko
2020-11-13 14:38 ` Jan Beulich
2020-11-13 14:44 ` Oleksandr Andrushchenko
2020-11-13 14:51 ` Jan Beulich
2020-11-13 14:52 ` Oleksandr Andrushchenko
2020-12-04 14:38 ` Oleksandr Andrushchenko
2020-12-07 8:48 ` Jan Beulich
2020-12-07 9:11 ` Oleksandr Andrushchenko
2020-12-07 9:28 ` Jan Beulich
2020-12-07 9:37 ` Oleksandr Andrushchenko
2020-12-07 9:50 ` Jan Beulich
2020-11-09 12:50 ` [PATCH 07/10] xen/arm: Do not hardcode phycial PCI device addresses Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 08/10] vpci/arm: Allow updating BAR's header for non-ECAM bridges Oleksandr Andrushchenko
2020-11-12 9:56 ` Roger Pau Monné
2020-11-13 6:46 ` Oleksandr Andrushchenko
2020-11-13 10:29 ` Jan Beulich
2020-11-13 10:39 ` Oleksandr Andrushchenko
2020-11-13 10:47 ` Jan Beulich
2020-11-13 10:55 ` Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 09/10] vpci/rcar: Implement vPCI.update_bar_header callback Oleksandr Andrushchenko
2020-11-12 10:00 ` Roger Pau Monné
2020-11-13 6:50 ` Oleksandr Andrushchenko
2020-11-09 12:50 ` [PATCH 10/10] [HACK] vpci/rcar: Make vPCI know DomD is hardware domain Oleksandr Andrushchenko
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=20201111144422.z2hi3ineg6qwbxi4@Air-de-Roger \
--to=roger.pau@citrix.com \
--cc=Bertrand.Marquis@arm.com \
--cc=Rahul.Singh@arm.com \
--cc=andr2000@gmail.com \
--cc=iwj@xenproject.org \
--cc=jbeulich@suse.com \
--cc=julien.grall@arm.com \
--cc=oleksandr_andrushchenko@epam.com \
--cc=sstabellini@kernel.org \
--cc=wl@xen.org \
--cc=xen-devel@lists.xenproject.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.