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Previously these somewhat device like structures were tracked using a list
in the CXLState in each machine. This is proving restrictive in a few
cases where we need to iterate through these without being aware of the
machine type. Just make them sysbus devices.
Restrict them to not user created as they need to be visible to early
stages of machine init given effects on the memory map.
This change both simplifies state tracking and enables features needed
for performance optimization and hotness tracking by making it possible
to retrieve the fixed memory window on actions elsewhere in the topology.
In some cases the ordering of the Fixed Memory Windows matters.
For those utility functions provide a GSList sorted by the window index.
This ensures that we get consistency across:
- ordering in the command line
- ordering of the host PA ranges
- ordering of ACPI CEDT structures describing the CFMWS.
Other aspects don't have this constraint. For those direct iteration
of the underlying hash structures is fine.
In the setup path for the memory map in pc_memory_init() split the
operations into two calls. The first, cxl_fmws_set_mmemap(), loops over
fixed memory windows in order and assigns their addresses. The second,
cxl_fmws_update_mmio() actually sets up the mmio for each window.
This is obviously less efficient than a single loop but this split design
is needed to put the logic in two different places in the arm64 support
and it is not a hot enough path to justify an x86 only implementation.
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Tested-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Itaru Kitayama <itaru.kitayama@fujitsu.com>
Message-id: 20250703104110.992379-3-Jonathan.Cameron@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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This commit was created with scripts/clean-includes.
All .c should include qemu/osdep.h first. The script performs three
related cleanups:
* Ensure .c files include qemu/osdep.h first.
* Including it in a .h is redundant, since the .c already includes
it. Drop such inclusions.
* Likewise, including headers qemu/osdep.h includes is redundant.
Drop these, too.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20230202133830.2152150-8-armbru@redhat.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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As the CXLState will no long be accessible via MachineState
at time of PXB_CXL realization, come back later from the machine specific
code to fill in the missing memory region setup. Only at this stage
is it possible to check if cxl=on, so that check is moved to this
later point.
Note that for multiple host bridges, the allocation order of the
register spaces is changed. This will be reflected in ACPI CEDT.
Stubs are added to handle case of CONFIG_PXB=n for machines that
call these functions.
The bus walking logic is common to all machines so add a utility
function + stub to cxl-host*.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Message-Id: <20220608145440.26106-6-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Whilst here take the oportunity to shorten the function name.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Message-Id: <20220608145440.26106-4-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Paolo Bonzini requested this change to simplify the ongoing
effort to allow machine setup entirely via RPC.
Includes shortening the command line form cxl-fixed-memory-window
to cxl-fmw as the command lines are extremely long even with this
change.
The json change is needed to ensure that there is
a CXLFixedMemoryWindowOptionsList even though the actual
element in the json is never used. Similar to existing
SgxEpcProperties.
Update qemu-options.hx to reflect that this is now a -machine
parameter. The bulk of -M / -machine parameters are documented
under machine, so use that in preference to M.
Update cxl-test and bios-tables-test to reflect new parameters.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Message-Id: <20220608145440.26106-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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