linux-kernel - [PATCH v3 0/2] x86/resctrl: Fix Platform QoS issues for Hygon

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Message-ID: <20251209062650.1536952-1-shenxiaochen@open-hieco.net>
Date: Tue,  9 Dec 2025 14:26:48 +0800
From: Xiaochen Shen <shenxiaochen@...n-hieco.net>
To: tony.luck@...el.com,
	reinette.chatre@...el.com,
	bp@...en8.de,
	fenghuay@...dia.com
Cc: babu.moger@....com,
	james.morse@....com,
	Dave.Martin@....com,
	x86@...nel.org,
	linux-kernel@...r.kernel.org,
	shenxiaochen@...n-hieco.net
Subject: [PATCH v3 0/2] x86/resctrl: Fix Platform QoS issues for Hygon

This patch series fixes two issues regarding Platform QoS (resctrl)
support on Hygon CPUs.

The first patch adds the missing initialization sequence required for
proper resctrl functionality. The second patch corrects the bit-width
configuration for the Memory Bandwidth Monitoring (MBM) counter.

Changelog:
v3:
- Remove the "Fixes: 923f3a2b48bd..." tag in two patches because this
  commit itself doesn't have an issue (Fenghua).

v2:
- Add "Reviewed-by:" tag in patch 1/2:
  "Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>"
- Add "Reviewed-by:" tags in patch 2/2:
  "Reviewed-by: Tony Luck <tony.luck@...el.com>"
  "Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>"
- Move the "Cc: stable@...r.kernel.org" tag to be after the author's SoB
  to comply with tip tree rules (Reinette)

Xiaochen Shen (2):
  x86/resctrl: Add missing resctrl initialization for Hygon
  x86/resctrl: Fix memory bandwidth counter width for Hygon

 arch/x86/kernel/cpu/resctrl/core.c     | 21 +++++++++++++++++----
 arch/x86/kernel/cpu/resctrl/internal.h |  3 +++
 2 files changed, 20 insertions(+), 4 deletions(-)

-- 
2.47.3