[PATCH V4 1/3] Xen: Add writeFiltering option for PCI devices
Daniel P. Berrangé
berrange at redhat.com
Wed Aug 26 09:34:07 UTC 2020
On Mon, Aug 24, 2020 at 08:26:55AM -0600, Jim Fehlig wrote:
> By default Xen only allows guests to write "known safe" values into PCI
> configuration space, yet many devices require writes to other areas of
> the configuration space in order to operate properly. To allow writing
> any values Xen supports the 'permissive' setting, see xl.cfg(5) man page.
>
> This change models Xen's permissive setting by adding a writeFiltering
> attribute on the <source> element of a PCI hostdev. When writeFiltering
> is set to 'no', the Xen permissive setting will be enabled and guests
> will be able to write any values into the device's configuration space.
> The permissive setting remains disabled in the absense of the
> writeFiltering attribute, of if it is explicitly set to 'yes'.
>
> Signed-off-by: Jim Fehlig <jfehlig at suse.com>
> Signed-off-by: Simon Gaiser <simon at invisiblethingslab.com>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek at invisiblethingslab.com>
> ---
> docs/formatdomain.rst | 7 ++++++-
> docs/schemas/domaincommon.rng | 5 +++++
> src/conf/domain_conf.c | 14 ++++++++++++++
> src/conf/domain_conf.h | 1 +
> src/libxl/libxl_conf.c | 1 +
> src/qemu/qemu_validate.c | 7 +++++++
> tests/libxlxml2domconfigdata/moredevs-hvm.json | 6 ++++++
> tests/libxlxml2domconfigdata/moredevs-hvm.xml | 5 +++++
> 8 files changed, 45 insertions(+), 1 deletion(-)
Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>
Regards,
Daniel
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