v2 updates: - Edit of patch description to not confuse matters by mentioning switches. - Associated ACPI test updates.
CXL platforms may support the concept of QoS Thottling groups (QTG). Typically you want to associate devices with similar performance with the same QTG. As there is no standard way of understanding the relationship between expected performance and appropriate QTG the platform firmware provides a query mechanism via ACPI Device Specific Method (DSM) with parameters of the performance numbers that returns the appropriate QTG ID. This support is basically stubbing out that function so that it always returns 0. For now that is sufficient for current CXL emulation usecases. Based on: [PATCH 0/4] hw/cxl: Minor CXL emulation fixes and cleanup Based on: Message ID: 20230904132806.6094-1-jonathan.came...@huawei.com Dave Jiang (1): hw/cxl: Add QTG _DSM support for ACPI0017 device Jonathan Cameron (2): tests/acpi: Allow update of DSDT.cxl tests/acpi: Update DSDT.cxl with QTG DSM include/hw/acpi/cxl.h | 1 + hw/acpi/cxl.c | 57 +++++++++++++++++++++++++++++++++++ hw/i386/acpi-build.c | 1 + tests/data/acpi/q35/DSDT.cxl | Bin 9655 -> 9723 bytes 4 files changed, 59 insertions(+) -- 2.39.2
