linux/include/acpi
Vishal Verma 56368029d9 PCI/ACPI: negotiate CXL _OSC
Add full support for negotiating _OSC as defined in the CXL 2.0 spec, as
applicable to CXL-enabled platforms. Advertise support for the CXL
features we support - 'CXL 2.0 port/device register access', 'Protocol
Error Reporting', and 'CXL Native Hot Plug'. Request control for 'CXL
Memory Error Reporting'. The requests are dependent on CONFIG_* based
prerequisites, and prior PCI enabling, similar to how the standard PCI
_OSC bits are determined.

The CXL specification does not define any additional constraints on
the hotplug flow beyond PCIe native hotplug, so a kernel that supports
native PCIe hotplug, supports CXL hotplug. For error handling protocol
and link errors just use PCIe AER. There is nascent support for
amending AER events with CXL specific status [1], but there's
otherwise no additional OS responsibility for CXL errors beyond PCIe
AER. CXL Memory Errors behave the same as typical memory errors so
CONFIG_MEMORY_FAILURE is sufficient to indicate support to platform
firmware.

[1]: https://lore.kernel.org/linux-cxl/164740402242.3912056.8303625392871313860.stgit@dwillia2-desk3.amr.corp.intel.com/

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/20220413073618.291335-4-vishal.l.verma@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2022-04-28 14:01:54 -07:00
..
platform ACPICA: Use uintptr_t and offsetof() in Linux kernel builds 2022-01-25 18:41:23 +01:00
acbuffer.h ACPICA: Add _PLD panel positions 2021-06-07 14:04:43 +02:00
acconfig.h ACPICA: Add support for PlatformRtMechanism OperationRegion handler 2021-06-07 14:04:43 +02:00
acexcep.h ACPICA: Updated all copyrights to 2021 2021-01-22 15:51:53 +01:00
acnames.h ACPICA: Add method name "_DIS" For use with aslmethod.c 2021-08-16 16:47:02 +02:00
acoutput.h ACPICA: Macros should not use a trailing semicolon 2021-08-16 16:47:02 +02:00
acpi_bus.h PCI/ACPI: negotiate CXL _OSC 2022-04-28 14:01:54 -07:00
acpi_drivers.h Merge branches 'acpi-pci' and 'acpi-processor' 2021-04-26 17:03:05 +02:00
acpi_io.h Revert "ACPI: Add memory semantics to acpi_os_map_memory()" 2021-09-23 20:39:36 +02:00
acpi_lpat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_numa.h ACPI: processor: Replace kernel.h with the necessary inclusions 2021-11-24 17:44:04 +01:00
acpi.h ACPICA: Updated all copyrights to 2021 2021-01-22 15:51:53 +01:00
acpiosxf.h ACPICA: Updated all copyrights to 2021 2021-01-22 15:51:53 +01:00
acpixf.h ACPICA: Update version to 20211217 2021-12-27 17:01:28 +01:00
acrestyp.h ACPICA: ACPI 6.4: add CSI2Bus resource template 2021-04-07 19:09:01 +02:00
actbl1.h ACPICA: Headers: Add new DBG2 Serial Port Subtypes 2021-08-16 16:47:02 +02:00
actbl2.h ACPICA: iASL/NHLT table: "Specific Data" field support 2021-12-27 17:01:28 +01:00
actbl3.h ACPICA: ACPI 6.4 SRAT: add Generic Port Affinity type 2021-10-05 15:53:37 +02:00
actbl.h ACPICA: Updated all copyrights to 2021 2021-01-22 15:51:53 +01:00
actypes.h ACPICA: Use uintptr_t and offsetof() in Linux kernel builds 2022-01-25 18:41:23 +01:00
acuuid.h ACPICA: ACPI 6.4: add USB4 capabilities UUID 2021-04-07 19:09:00 +02:00
apei.h ACPI: APEI: rename ghes_init() with an "acpi_" prefix 2022-03-03 20:25:23 +01:00
battery.h ACPI: battery: include linux/power_supply.h 2020-09-25 18:31:19 +02:00
button.h ACPI: button: move HIDs to acpi/button.h 2020-02-13 23:36:23 +01:00
cppc_acpi.h ACPI: CPPC: Add CPPC enable register function 2021-12-30 18:51:39 +01:00
ghes.h ACPI / APEI: Add a notifier chain for unknown (vendor) CPER records 2020-09-16 10:30:42 +01:00
hed.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
nfit.h acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle 2018-03-14 12:43:50 +01:00
pcc.h mailbox: pcc: Use PCC mailbox channel pointer instead of standard 2021-10-29 22:46:38 -05:00
pdc_intel.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor.h ACPI: processor: Replace kernel.h with the necessary inclusions 2021-11-24 17:44:04 +01:00
reboot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00