| Message ID | 166993046717.1882361.10587956243041624761.stgit@dwillia2-xfh.jf.intel.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | da8380bbbe90f69bec4be69af4d0deb7cf2bbcfe |
| Headers | show |
| Series | cxl: Add support for Restricted CXL hosts (RCD mode) | expand |
On Thu, 01 Dec 2022 13:34:27 -0800 Dan Williams <dan.j.williams@intel.com> wrote: > From: Terry Bowman <terry.bowman@amd.com> > > 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 > Signed-off-by: Dan Williams <dan.j.williams@intel.com> Mostly for completeness rather than because a review of this patch brings any value as it's 'obviously correct'. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > --- > drivers/acpi/pci_root.c | 1 + > 1 file changed, 1 insertion(+) > > 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)) >
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))