...and hence the ability to disable IOMMU mappings, and control EPT
sharing.
This patch introduces a new 'libxl_passthrough' enumeration into
libxl_domain_create_info. The value will be set by xl either when it parses
a new 'passthrough' option in xl.cfg, or implicitly if there is passthrough
hardware specified for the domain.
If the value of the passthrough configuration option is 'disabled' then
the XEN_DOMCTL_CDF_iommu flag will be clear in the xen_domctl_createdomain
flags, thus allowing the toolstack to control whether the domain gets
IOMMU mappings or not (where previously they were globally set).
If the value of the passthrough configuration option is 'sync_pt' then
a new 'iommu_opts' field in xen_domctl_createdomain will be set with the
value XEN_DOMCTL_IOMMU_no_sharept. This will override the global default
set in iommu_hap_pt_share, thus allowing the toolstack to control whether
EPT sharing is used for the domain.
If the value of passthrough is 'enabled' then xl will choose an appropriate
default according to the type of domain and hardware support.
NOTE: The 'iommu_memkb' overhead in libxl_domain_build_info will now only
be set if passthrough is 'sync_pt' (or xl has chosen this mode as
a default).
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Christian Lindig <christian.lindig@citrix.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Now that there is a per-domain IOMMU-enable flag, which should be set if
any device is going to be passed through, stop deferring page table
construction until the assignment is done. Also don't tear down the tables
again when the last device is de-assigned; defer that task until domain
destruction.
This allows the has_iommu_pt() helper and iommu_status enumeration to be
removed. Calls to has_iommu_pt() are simply replaced by calls to
is_iommu_enabled(). Remaining open-coded tests of iommu_hap_pt_share can
also be replaced by calls to iommu_use_hap_pt().
The arch_iommu_populate_page_table() and iommu_construct() functions become
redundant, as does the 'strict mode' dom0 page_list mapping code in
iommu_hwdom_init(), and iommu_teardown() can be made static is its only
remaining caller, iommu_domain_destroy(), is within the same source
module.
All in all, about 220 lines of code are removed from the hypervisor (at
the expense of some additions in the toolstack).
NOTE: This patch will cause a small amount of extra resource to be used
to accommodate IOMMU page tables that may never be used, since the
per-domain IOMMU-enable flag is currently set to the value of the
global iommu_enable flag. A subsequent patch will add an option to
the toolstack to allow it to be turned off if there is no intention
to assign passthrough hardware to the domain.
To account for the extra resource, 'iommu_memkb' has been added to
domain_build_info. This patch sets it to a value calculated based
on the domain's maximum memory when the P2M sharing is either not
supported or globally disabled, or zero otherwise. However, when
the toolstack option mentioned above is added, it will also be zero
if the per-domain IOMMU-enable flag is turned off.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: Wei Liu <wl@xen.org>
Handle += of both strings and lists.
If += is used for config options expected to be numbers, then a
warning is printed and the config option ignored (because xl ignores
config options with errors).
This is to be used for development purposes, where modifying config
option can be done on the `xl create' command line.
One could have a cmdline= in the cfg file, and specify cmdline+= on
the `xl create` command line without the need to write the whole
cmdline in `xl' command line but simply append to the one in the cfg file.
Or add an extra vif or disk by simply having "vif += [ '', ];" in the
`xl' cmdline.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Functions pci_add_qemu_trad_watch_state_cb and
pci_remove_qemu_trad_watch_state_cb are similar so the common part is
extracted in a different function.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Removed libxl__qmp_cpu_add since it's not used anymore.
`cpumap' arg of libxl__set_vcpuonline_xenstore is constified.
The QMP command "query-cpus" is going to be called from different
places, so the algorithm that parse the answer is in a separate
function, qmp_parse_query_cpus.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This patch also replaces the use of
libxl__wait_for_device_model_deprecated() by its equivalent
without the need for a thread.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This is in preparation of using asynchronous operation to communicate
with QEMU via QMP (libxl__ev_qmp).
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This patch also replaces the use of
libxl__wait_for_device_model_deprecated() by its equivalent
without the need for a thread.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
QEMU upstream (or qemu-xen) may not have set "running" state in
xenstore. "running" with QEMU doesn't mean that the binary is
running, it means that the emulation have started. When adding a
pci-passthrough device to QEMU, we do so via QMP, we have a direct
answer to whether QEMU is running or not, no need to check ahead.
Moving the check to do it only with qemu-trad makes upcoming changes
simpler.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
do_pci_add is going to be asynchronous, so we start by having a single
path out of the function. All `return`s instead set rc and goto out.
While here, some use of `rc' was used to store the return value of
libxc calls, change them to store into `r'. Also, add the value of `r'
in the error message of those calls.
There were an `out' label that was use it seems to skip setting up the
IRQ, the label has been renamed to `out_no_irq'.
No functional changes.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This also mean libxl__initiate_device_usbctrl_remove, which uses
libxl__device_usbdev_remove synchronously, needs to be updated to use
it with multidev.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
These two fields help to give more information about the device been
hotplug/hotunplug to callbacks.
There is already `dev' of type `libxl__device', but it is mostly
useful when the backend/frontend is xenstore. Some device (like
`usbdev') don't have devid, so `dev' can't be used.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
`aodev->qmp' is initialised in libxl__prepare_ao_device(), but since
there isn't a single exit path for a `libxl__ao_device', users of this
new `qmp' field will have to disposed of it.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Having the function do_usbdev_remove makes it harder to add asynchronous
calls into it. Move its body back into libxl__device_usbdev_remove and
adjust the latter as there are no reason to have a separated function.
No functional changes.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Having the function do_usbdev_add makes it harder to add asynchronous
calls into it. Move its body back into libxl__device_usbdev_add and
adjust the latter as there are no reason to have a separated function.
No functional changes.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl__domain_unpause is a reimplementation of
libxl__domain_unpause_deprecated with asynchronous operation.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl__domain_resume is a rework libxl__domain_resume_deprecated. It
makes uses of ev_xswatch and ev_qmp, to replace synchronous QMP calls
and libxl__wait_for_device_model_deprecated call.
This patch also introduce libxl__dm_resume which is a sub-operation of
both libxl__domain_resume and libxl__domain_unpause and can be used
instead of libxl__domain_resume_device_model_deprecated.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
These two functions are used from many places in libxl and need to
change to be able to accomodate libxl__ev_qmp calls and thus needs to
be asynchronous.
(There is also libxl__domain_resume_device_model in the mix.)
A later patch will introduce a new libxl__domain_resume and
libxl__domain_unpause which will make use of libxl__ev_qmp.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Setup a timeout of 10s for all the commands. It used to be about 5s
per commands.
The order of command is changed, we call 'query-vnc' before
'change-vnc-password', but that should not matter. That makes it
easier to call 'change-vnc-password' conditionally.
Also 'change' command is replaced by 'change-vnc-password'
because 'change' is deprecated. The new command is available in all
QEMU versions that also have Xen support.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl__qmp_initializations is part of the device domain startup, it
queries information about the newly spawned QEMU and do some
post-startup configuration. So the function call doesn't belong to the
general domain creation, but only to the device model part of the
process, thus the call belong to libxl_dm and libxl__dm_spawn_state's
machinery.
We move the call ahead of a follow-up patch which going to "inline"
libxl__qmp_initializations.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl_domain_unpause needs to make QMP calls, which are asynchronous,
change the API to reflect that.
Do the same with libxl_domain_pause async, even if it will keep
completing synchronously.
Also fix some coding style issue in those functions.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
The functions that calls usbctrl_getinfo() only needs information that
can be found in a `libxl_device_usbctrl'. So avoid calling
libxl_device_usbctrl_getinfo and call libxl_devid_to_device_usbctrl
instead. (libxl_device_usbctrl_getinfo needs a `libxl_device_usbctrl'
anyway.)
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Two functions in generate `libxl_device_usbctrl' can be replaced by
generic macro:
- libxl_device_usbctrl_list -> LIBXL_DEFINE_DEVICE_LIST
- libxl_devid_to_device_usbctrl -> LIBXL_DEFINE_DEVID_TO_DEVICE
This patch only needs to define `libxl__usbctrl_devtype.from_xenstore'
to makes use of them.
Small change, libxl_devid_to_device_usbctrl doesn't list all usbctrl
anymore before finding the right one.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
The libxl_device_TYPE parameter of all the libxl_device_TYPE_getinfo
function seems to be only used as input to find more information to bi
stored in the libxl_TYPEinfo parameter.
Make sure this is always true and constify the input parameter to avoid
further mistake.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
`usbctrl' is modified in this function which doesn't seems to be
intended, and usbctrlinfo.backend_id was never modified.
Take this opportunity to consify the argument `usbctrl' in libxl API
to avoid similar mistake.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Replace the assert(0) by abort() since the intention in libxl is that
asserts are always compiled in. This patch makes its clear and removes
the need to deal with asserts been compiled out.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
ao->domid isn't a reliable way of getting a domid, it might not be set
(this isn't the case here). The right domid value can be found in the
libxl__device (which is the device we want to remove) attached to
libxl__ao_device.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
- dom_path isn't used anymore in that function, remove it.
- Use `r' to store return value of external calls.
- Use `CTX', no need for a local `ctx'.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
sdss->pvqemu wasn't initialiased and disposed of properly.
Also, move the initialisation of sdss->xswait with the rest of the
initialisation of sdss.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
There are two differents set of callbacks here, one for
libxl__domain_common_switch_qemu_logdirty,
and one for libxl__domain_suspend_common_switch_qemu_logdirty.
The first set calls the second.
Pure code motion.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
The argument `starting' is used as a boolean, change its type to
reflex that throughout libxl_pci.c.
No functional changes.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Paul Durrant
Anthony PERARD