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cxl/acpi: Set ACPI's CXL _OSC to indicate RCD mode support
ACPI uses the CXL _OSC support method to communicate the available CXL functionality to FW. The CXL _OSC support method includes a field to indicate the OS is capable of RCD mode. FW can potentially change it's operation depending on the _OSC support method reported by the OS. The ACPI driver currently only sets the ACPI _OSC support method to indicate CXL VH mode. Change the capability reported to also include CXL RCD mode. [1] CXL3.0 Table 9-26 'Interpretation of CXL _OSC Support Field' Signed-off-by: Terry Bowman <terry.bowman@amd.com> [rrichter@amd.com: Reworded patch description.] Signed-off-by: Robert Richter <rrichter@amd.com> Link: http://lore.kernel.org/r/Y4cRV/Sj0epVW7bE@rric.localdomain Link: https://lore.kernel.org/r/166993046717.1882361.10587956243041624761.stgit@dwillia2-xfh.jf.intel.com Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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@ -493,6 +493,7 @@ static u32 calculate_cxl_support(void)
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u32 support;
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support = OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT;
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support |= OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT;
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if (pci_aer_available())
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support |= OSC_CXL_PROTOCOL_ERR_REPORTING_SUPPORT;
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if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
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