From: Anthony PERARD <anthony.perard@citrix.com>
To: Paul Durrant <paul.durrant@citrix.com>
Cc: qemu-devel@nongnu.org, xen-devel@lists.xenproject.org,
Stefano Stabellini <sstabellini@kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Marcel Apfelbaum <marcel@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>,
Eduardo Habkost <ehabkost@redhat.com>,
Roger Pau Monne <roger.pau@citrix.com>,
Jan Beulich <JBeulich@suse.com>
Subject: Re: [Qemu-devel] [PATCH v4] xen-hvm: stop faking I/O to access PCI config space
Date: Fri, 18 May 2018 16:31:40 +0100 [thread overview]
Message-ID: <20180518153140.GW2057@perard.uk.xensource.com> (raw)
In-Reply-To: <1526654310-20797-1-git-send-email-paul.durrant@citrix.com>
On Fri, May 18, 2018 at 03:38:30PM +0100, Paul Durrant wrote:
> This patch removes the current hackery where IOREQ_TYPE_PCI_CONFIG
> requests are handled by faking PIO to 0xcf8 and 0xcfc and replaces it
> with direct calls to pci_host_config_read/write_common().
> Doing so necessitates mapping BDFs to PCIDevices but maintaining a simple
> QLIST in xen_device_realize/unrealize() will suffice.
>
> NOTE: whilst config space accesses are currently limited to
> PCI_CONFIG_SPACE_SIZE, this patch paves the way to increasing the
> limit to PCIE_CONFIG_SPACE_SIZE when Xen gains the ability to
> emulate MCFG table accesses.
>
> Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
--
Anthony PERARD
prev parent reply other threads:[~2018-05-18 15:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-18 14:38 [Qemu-devel] [PATCH v4] xen-hvm: stop faking I/O to access PCI config space Paul Durrant
2018-05-18 15:31 ` Anthony PERARD [this message]
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