Jonathan Cameron <jonathan.came...@huawei.com> writes:
> These are very similar to the recently added Generic Initiators
> but instead of representing an initiator of memory traffic they
> represent an edge point beyond which may lie either targets or
> initiators. Here we add these ports such that they may
> be targets of hmat_lb records to describe the latency and
> bandwidth from host side initiators to the port. A descoverable
> mechanism such as UEFI CDAT read from CXL devices and switches
> is used to discover the remainder fo the path and the OS can build
> up full latency and bandwidth numbers as need for work and data
> placement decisions.
>
> Signed-off-by: Jonathan Cameron <jonathan.came...@huawei.com>
> ---
> qapi/qom.json | 18 +++
> include/hw/acpi/acpi_generic_initiator.h | 18 ++-
> include/hw/pci/pci_bridge.h | 1 +
> hw/acpi/acpi_generic_initiator.c | 141 +++++++++++++++++------
> hw/pci-bridge/pci_expander_bridge.c | 1 -
> 5 files changed, 141 insertions(+), 38 deletions(-)
>
> diff --git a/qapi/qom.json b/qapi/qom.json
> index 85e6b4f84a..5480d9ca24 100644
> --- a/qapi/qom.json
> +++ b/qapi/qom.json
> @@ -826,6 +826,22 @@
> 'data': { 'pci-dev': 'str',
> 'node': 'uint32' } }
>
> +
> +##
> +# @AcpiGenericPortProperties:
> +#
> +# Properties for acpi-generic-port objects.
> +#
> +# @pci-bus: PCI bus of the hostbridge associated with this SRAT entry
What's this exactly? A QOM path? A qdev ID? Something else?
> +#
> +# @node: numa node associated with the PCI device
NUMA
Is this a NUMA node ID?
> +#
> +# Since: 9.1
> +##
> +{ 'struct': 'AcpiGenericPortProperties',
> + 'data': { 'pci-bus': 'str',
> + 'node': 'uint32' } }
> +
> ##
> # @RngProperties:
> #
> @@ -944,6 +960,7 @@
> { 'enum': 'ObjectType',
> 'data': [
> 'acpi-generic-initiator',
> + 'acpi-generic-port',
> 'authz-list',
> 'authz-listfile',
> 'authz-pam',
> @@ -1016,6 +1033,7 @@
> 'discriminator': 'qom-type',
> 'data': {
> 'acpi-generic-initiator': 'AcpiGenericInitiatorProperties',
> + 'acpi-generic-port': 'AcpiGenericPortProperties',
> 'authz-list': 'AuthZListProperties',
> 'authz-listfile': 'AuthZListFileProperties',
> 'authz-pam': 'AuthZPAMProperties',
[...]
