Linux-PCI Archive on lore.kernel.org
 help / color / Atom feed
From: Bjorn Helgaas <helgaas@kernel.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	linux-pci <linux-pci@vger.kernel.org>,
	Sinan Kaya <okaya@kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [RFC PATCH v2] arm64: acpi/pci: invoke _DSM whether to preserve firmware PCI setup
Date: Fri, 14 Jun 2019 08:12:53 -0500
Message-ID: <20190614131253.GR13533@google.com> (raw)
In-Reply-To: <84320a45ef9395d82bf1c5d4d2d7e6db189cbfda.camel@kernel.crashing.org>

On Fri, Jun 14, 2019 at 08:43:19PM +1000, Benjamin Herrenschmidt wrote:

> This least to another conversation we hinted at earlier.. we should
> probably have a way to do the same at least for BARs on ACPI systems so
> we don't have to temporarily disable access to a device to size them.

The PCI Enhanced Allocation capability provides a way to do this.  I
don't know how widely used it is, but it's theoretically possible.

  reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13  7:54 Benjamin Herrenschmidt
2019-06-13 19:02 ` Bjorn Helgaas
2019-06-13 21:59   ` Benjamin Herrenschmidt
2019-06-13 23:07   ` Benjamin Herrenschmidt
2019-06-14  7:42     ` Ard Biesheuvel
2019-06-14  8:36       ` Benjamin Herrenschmidt
2019-06-14  9:57         ` Lorenzo Pieralisi
2019-06-14 10:36           ` Benjamin Herrenschmidt
2019-06-14 10:43             ` Benjamin Herrenschmidt
2019-06-14 13:12               ` Bjorn Helgaas [this message]
2019-06-14 13:48                 ` Benjamin Herrenschmidt
2019-06-14 20:13                   ` Bjorn Helgaas
2019-06-15  1:18                     ` Benjamin Herrenschmidt
2019-06-14 13:09         ` Bjorn Helgaas
2019-06-14 13:46           ` Benjamin Herrenschmidt

Reply instructions:

You may reply publically 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=20190614131253.GR13533@google.com \
    --to=helgaas@kernel.org \
    --cc=ard.biesheuvel@linaro.org \
    --cc=benh@kernel.crashing.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=okaya@kernel.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

Linux-PCI Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-pci/0 linux-pci/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-pci linux-pci/ https://lore.kernel.org/linux-pci \
		linux-pci@vger.kernel.org linux-pci@archiver.kernel.org
	public-inbox-index linux-pci


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-pci


AGPL code for this site: git clone https://public-inbox.org/ public-inbox