diff options
| author | Terry Bowman <terry.bowman@amd.com> | 2022-12-01 22:34:27 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-12-05 19:32:26 +0100 |
| commit | da8380bbbe90f69bec4be69af4d0deb7cf2bbcfe (patch) | |
| tree | bda68065828ab1ba54788e1afe64d80a91d86655 /drivers/acpi | |
| parent | tools/testing/cxl: Add an RCH topology (diff) | |
| download | linux-da8380bbbe90f69bec4be69af4d0deb7cf2bbcfe.tar.xz linux-da8380bbbe90f69bec4be69af4d0deb7cf2bbcfe.zip | |
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>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 4e3db20e9cbb..b3c202d2a433 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -493,6 +493,7 @@ static u32 calculate_cxl_support(void) u32 support; support = OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT; + support |= OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT; if (pci_aer_available()) support |= OSC_CXL_PROTOCOL_ERR_REPORTING_SUPPORT; if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE)) |