leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

platform/x86: Add AMD system management interface

Browse Source 
Recent Fam19h EPYC server line of processors from AMD support system
management functionality via HSMP (Host System Management Port) interface.

The Host System Management Port (HSMP) is an interface to provide
OS-level software with access to system management functions via a
set of mailbox registers.

More details on the interface can be found in chapter
"7 Host System Management Port (HSMP)" of the following PPR
https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip

This patch adds new amd_hsmp module under the drivers/platforms/x86/
which creates miscdevice with an IOCTL interface to the user space.
/dev/hsmp is for running the hsmp mailbox commands.

Signed-off-by: Suma Hegde <suma.hegde@amd.com>
Signed-off-by: Naveen Krishna Chatradhi <nchatrad@amd.com>
Reviewed-by: Carlos Bilbao <carlos.bilbao@amd.com>
Acked-by: Song Liu <song@kernel.org>
Reviewed-by: Nathan Fontenot <nathan.fontenot@amd.com>
Link: https://lore.kernel.org/r/20220222050501.18789-1-nchatrad@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Suma Hegde
2022-02-22 10:35:00 +05:30
committed by Hans de Goede
parent f094399fae
commit 91f410aa67
7 changed files with 670 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/userspace-api/ioctl/ioctl-number.rst
View File

@@ -372,6 +372,8 @@ Code Seq# Include File Comments
<mailto:thomas@winischhofer.net>
0xF6 all LTTng Linux Trace Toolkit Next Generation
<mailto:mathieu.desnoyers@efficios.com>
0xF8 all arch/x86/include/uapi/asm/amd_hsmp.h AMD HSMP EPYC system management interface driver
<mailto:nchatrad@amd.com>
0xFD all linux/dm-ioctl.h
0xFE all linux/isst_if.h
==== ===== ======================================================= ================================================================