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OpenCloudOS-Kernel
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Dan Williams 40ba17afdf cxl/acpi: Introduce cxl_decoder objects 
A cxl_decoder is a child of a cxl_port. It represents a hardware decoder
configuration of an upstream port to one or more of its downstream
ports. The decoder is either represented in CXL standard HDM decoder
registers (see CXL 2.0 section 8.2.5.12 CXL HDM Decoder Capability
Structure), or it is a static decode configuration communicated by
platform firmware (see the CXL Early Discovery Table: Fixed Memory
Window Structure).

The firmware described and hardware described decoders differ slightly
leading to 2 different sub-types of decoders, cxl_decoder_root and
cxl_decoder_switch. At the root level the decode capabilities restrict
what can be mapped beneath them. Mid-level switch decoders are
configured for either acclerator (type-2) or memory-expander (type-3)
operation, but they are otherwise agnostic to the type of memory
(volatile vs persistent) being mapped.

Here is an example topology from a single-ported host-bridge environment
without CFMWS decodes enumerated.

    /sys/bus/cxl/devices/root0
    ├── devtype
    ├── dport0 -> ../../../LNXSYSTM:00/LNXSYBUS:00/ACPI0016:00
    ├── port1
    │   ├── decoder1.0
    │   │   ├── devtype
    │   │   ├── locked
    │   │   ├── size
    │   │   ├── start
    │   │   ├── subsystem -> ../../../../../../bus/cxl
    │   │   ├── target_list
    │   │   ├── target_type
    │   │   └── uevent
    │   ├── devtype
    │   ├── dport0 -> ../../../../pci0000:34/0000:34:00.0
    │   ├── subsystem -> ../../../../../bus/cxl
    │   ├── uevent
    │   └── uport -> ../../../../LNXSYSTM:00/LNXSYBUS:00/ACPI0016:00
    ├── subsystem -> ../../../../bus/cxl
    ├── uevent
    └── uport -> ../../ACPI0017:00

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/162325695128.2293823.17519927266014762694.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
 		2021-06-09 18:02:39 -07:00
..
accessibility TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
acpi ACPICA: Use ACPI_FALLTHROUGH 2021-06-07 14:04:43 +02:00
amba
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android binder: Return EFAULT if we fail BINDER_ENABLE_ONEWAY_SPAM_DETECTION 2021-05-13 20:35:26 +02:00
ata pci-v5.13-changes 2021-05-05 13:24:11 -07:00
atm atm: firestream: Use fallthrough pseudo-keyword 2021-05-07 16:01:08 -07:00
auxdisplay treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
base drivers/base/memory: fix trying offlining memory blocks with memory holes on aarch64 2021-06-05 08:58:11 -07:00
bcma bcma: remove unused function 2021-04-18 09:36:56 +03:00
block block-5.13-2021-05-14 2021-05-15 08:52:30 -07:00
bluetooth Networking fixes for 5.13-rc5, including fixes from bpf, wireless, 2021-06-04 18:25:39 -07:00
bus Regression fix for TI dra7 SATA not detecting drives 2021-06-05 15:39:58 -07:00
cdrom cdrom: gdrom: initialize global variable at init time 2021-05-13 18:58:44 +02:00
char Char/misc driver fixes for 5.13-rc3 2021-05-20 06:31:52 -10:00
clk clk: Skip clk provider registration when np is NULL 2021-05-11 08:47:25 +02:00
clocksource clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86 2021-05-14 14:55:13 +02:00
comedi staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
connector
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counter
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cpufreq Fix an idle CPU selection bug, and an AMD Ryzen maximum frequency enumeration bug. 2021-05-15 10:24:48 -07:00
cpuidle
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crypto Revert "crypto: cavium/nitrox - add an error message to explain the failure of pci_request_mem_regions" 2021-05-13 17:23:05 +02:00
cxl cxl/acpi: Introduce cxl_decoder objects 2021-06-09 18:02:39 -07:00
dax
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dca
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devfreq
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dio
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dma dmaengine: idxd: Use cpu_feature_enabled() 2021-06-03 16:32:59 +02:00
dma-buf dma-buf: fix unintended pin/unpin warnings 2021-05-20 14:02:27 +02:00
edac x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
eisa
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extcon - Core Frameworks 2021-04-28 15:59:13 -07:00
firewire The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
firmware EFI fixes for v5.13-rc 2021-05-23 11:39:02 +02:00
fpga ARM: SoC drivers for v5.13 2021-04-26 12:11:52 -07:00
fsi
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gnss
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gpio gpio: tegra186: Don't set parent IRQ affinity 2021-05-12 13:56:43 +02:00
gpu drm/tegra: Fixes for v5.13-rc5 2021-06-04 10:23:57 +10:00
greybus greybus: es2: fix kernel-doc warnings 2021-04-16 07:26:50 +02:00
hid HID: asus: Cleanup Asus T101HA keyboard-dock handling 2021-05-27 15:40:35 +02:00
hsi HSI: core: fix resource leaks in hsi_add_client_from_dt() 2021-04-16 00:14:49 +02:00
hv printk changes for 5.13 2021-04-27 18:09:44 -07:00
hwmon hwmon fixes for v5.13-rc4 2021-06-02 08:41:45 -10:00
hwspinlock
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hwtracing ARM: 2021-05-01 10:14:08 -07:00
i2c i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops 2021-06-04 22:32:58 +02:00
i3c Revert "i3c master: fix missing destroy_workqueue() on error in i3c_master_register" 2021-04-24 22:21:01 +02:00
ide
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idle
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iio iio: adc: ad7793: Add missing error code in ad7793_setup() 2021-05-22 08:32:36 +01:00
infiniband Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-05-06 23:37:55 -07:00
interconnect interconnect: qcom: Add missing MODULE_DEVICE_TABLE 2021-05-11 07:26:31 +03:00
iommu iommu/vt-d: Fix sysfs leak in alloc_iommu() 2021-05-27 16:07:08 +02:00
ipack
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irqchip irqchip: Remove redundant error printing 2021-05-16 13:07:18 +01:00
isdn Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
leds leds: lp5523: check return value of lp5xx_read and jump to cleanup code 2021-05-13 17:30:15 +02:00
lightnvm lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15 2021-04-13 09:16:12 -06:00
macintosh macintosh/via-pmu: Fix build warning 2021-04-16 23:57:51 +10:00
mailbox - qcom: enable support for SM8350 and SC7280 2021-04-28 16:10:33 -07:00
mcb
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md block-5.13-2021-05-28 2021-05-28 14:42:37 -10:00
media media: gspca: properly check for errors in po1030_probe() 2021-05-13 18:58:32 +02:00
memory .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
memstick memstick: r592: ignore kfifo_out() return code again 2021-04-26 11:08:23 +02:00
message scsi: message: fusion: Remove unused local variable 'vtarget' 2021-04-13 01:39:12 -04:00
mfd - Core Frameworks 2021-04-28 15:59:13 -07:00
misc Char/Misc driver fixes for 5.13-rc4 2021-05-29 06:41:50 -10:00
mmc mmc: sdhci-pci-gli: increase 1.8V regulator wait 2021-05-10 14:39:06 +02:00
most Staging/IIO driver updates for 5.13-rc1 2021-04-26 11:14:21 -07:00
mtd mtd: parsers: ofpart: fix parsing subpartitions 2021-05-10 18:34:30 +02:00
mux
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net cxgb4: avoid link re-train during TC-MQPRIO configuration 2021-06-04 14:45:13 -07:00
nfc NFC: nfcmrvl: fix kernel-doc syntax in file headers 2021-05-23 17:26:38 -07:00
ntb
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nubus
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nvdimm include: remove pagemap.h from blkdev.h 2021-05-06 19:24:11 -07:00
nvme nvmet: fix freeing unallocated p2pmem 2021-06-02 10:10:38 +03:00
nvmem
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of of: overlay: Remove redundant assignment to ret 2021-05-03 13:57:56 -05:00
opp
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parisc
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parport treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
pci PCI/MSI: Fix MSIs for generic hosts that use device-tree's "msi-map" 2021-05-25 18:37:37 -05:00
pcmcia
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perf ARM: 2021-05-01 10:14:08 -07:00
phy Networking changes for 5.13. 2021-04-29 11:57:23 -07:00
pinctrl linux/kconfig.h: replace IF_ENABLED() with PTR_IF() in <linux/kernel.h> 2021-05-09 00:29:45 +09:00
platform platform/x86: touchscreen_dmi: Add info for the Chuwi Hi10 Pro (CWI529) tablet 2021-05-20 14:11:03 +02:00
pnp
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power power supply and reset changes for the v5.13 series 2021-04-28 15:43:58 -07:00
powercap
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pps TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
ps3
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ptp ptp: ocp: Fix a resource leak in an error handling path 2021-05-12 14:06:33 -07:00
pwm pwm: Changes for v5.13-rc1 2021-05-05 12:53:16 -07:00
rapidio rapidio: handle create_workqueue() failure 2021-05-13 18:32:19 +02:00
ras
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regulator - Core Frameworks 2021-04-28 15:59:13 -07:00
remoteproc remoteproc updates for v5.13 2021-05-04 11:13:33 -07:00
reset pci-v5.13-changes 2021-05-05 13:24:11 -07:00
rpmsg
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rtc RTC for 5.13 2021-05-03 12:15:21 -07:00
s390 - Fix races in vfio-ccw request handling. 2021-05-29 05:51:53 -10:00
sbus
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scsi SCSI fixes on 20210606 2021-06-06 15:39:56 -07:00
sh The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
siox
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slimbus
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soc soc: amlogic: meson-clk-measure: remove redundant dev_err call in meson_msr_probe() 2021-05-31 09:26:58 +02:00
soundwire soundwire: qcom: fix handling of qcom,ports-block-pack-mode 2021-05-13 11:14:13 +05:30
spi spi: sc18is602: implement .max_{transfer,message}_size() for the controller 2021-05-21 13:13:33 +01:00
spmi
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ssb
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staging Second set of IIO fixes for the 5.13 cycle 2021-05-22 09:49:59 +02:00
target scsi: target: core: Fix warning on realtime kernels 2021-05-31 22:59:13 -04:00
tc
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tee OP-TEE use export_uuid() to copy UUID 2021-06-05 15:43:11 -07:00
thermal - Fix out-of-spec hardware (1st gen Hygon) which does not implement 2021-06-06 12:25:43 -07:00
thunderbolt thunderbolt: usb4: Fix NVM read buffer bounds and offset issue 2021-05-20 11:52:58 +03:00
tty TTY / Serial driver fixes for 5.13-rc4 2021-05-29 06:25:16 -10:00
uio uio_hv_generic: Fix another memory leak in error handling paths 2021-05-14 13:26:04 +02:00
usb xhci: Fix 5.12 regression of missing xHC cache clearing command after a Stall 2021-05-25 10:21:47 +02:00
vdpa {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table 2021-05-18 23:01:48 -07:00
vfio vfio/platform: fix module_put call in error flow 2021-05-24 13:40:13 -06:00
vhost virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00
video Revert "fb_defio: Remove custom address_space_operations" 2021-06-01 17:38:40 +02:00
virt nitro_enclaves: Fix stale file descriptors on failed usercopy 2021-04-29 19:06:49 +02:00
virtio virtio_pci_modern: correct sparse tags for notify 2021-05-04 04:19:59 -04:00
visorbus
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vlynq
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vme
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w1 w1: ds28e17: Use module_w1_family to simplify the code 2021-04-10 10:58:21 +02:00
watchdog - Core Frameworks 2021-04-28 15:59:13 -07:00
xen xen-pciback: reconfigure also from backend watch handler 2021-05-21 09:55:16 +02:00
zorro
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Kconfig staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
Makefile virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00