From 05e37b2138a6deb1f23daf1282dc86b29968a1ab Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Mon, 16 Oct 2023 10:57:54 -0700 Subject: cxl: Add decoders_committed sysfs attribute to cxl_port This attribute allows cxl-cli to determine whether there are decoders committed to a memdev. This is only a snapshot of the state, and doesn't offer any protection or serialization against a concurrent disable-region operation. Reviewed-by: Jim Harris Suggested-by: Dan Williams Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/169747907439.272156.10261062080830155662.stgit@djiang5-mobl3 Signed-off-by: Dan Williams --- Documentation/ABI/testing/sysfs-bus-cxl | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'Documentation/ABI/testing') diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 087f762ebfd5..432610f41aee 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -178,6 +178,21 @@ Description: hardware decoder target list. +What: /sys/bus/cxl/devices/portX/decoders_committed +Date: October, 2023 +KernelVersion: v6.7 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) A memory device is considered active when any of its + decoders are in the "committed" state (See CXL 3.0 8.2.4.19.7 + CXL HDM Decoder n Control Register). Hotplug and destructive + operations like "sanitize" are blocked while device is actively + decoding a Host Physical Address range. Note that this number + may be elevated without any regionX objects active or even + enumerated, as this may be due to decoders established by + platform firwmare or a previous kernel (kexec). + + What: /sys/bus/cxl/devices/decoderX.Y Date: June, 2021 KernelVersion: v5.14 -- cgit