summaryrefslogtreecommitdiff
path: root/drivers/acpi/pci_root.c
diff options
context:
space:
mode:
authorTerry Bowman <terry.bowman@amd.com>2022-12-02 00:34:27 +0300
committerDan Williams <dan.j.williams@intel.com>2022-12-05 21:32:26 +0300
commitda8380bbbe90f69bec4be69af4d0deb7cf2bbcfe (patch)
treebda68065828ab1ba54788e1afe64d80a91d86655 /drivers/acpi/pci_root.c
parentc9435dbee119f42132af2c3fc0382d16bda32601 (diff)
downloadlinux-da8380bbbe90f69bec4be69af4d0deb7cf2bbcfe.tar.xz
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/pci_root.c')
-rw-r--r--drivers/acpi/pci_root.c1
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))