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Subject: [PATCH v2 00/10] x86/resctrl: Support for AMD QoS new features and
 bug fix
From:   Babu Moger <babu.moger@amd.com>
To:     <fenghua.yu@intel.com>, <reinette.chatre@intel.com>,
        <tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>
CC:     <eranian@google.com>, <dave.hansen@linux.intel.com>,
        <x86@kernel.org>, <hpa@zytor.com>, <corbet@lwn.net>,
        <hpa@zytor.com>, <linux-kernel@vger.kernel.org>,
        <linux-doc@vger.kernel.org>
Date:   Mon, 1 Aug 2022 15:55:40 -0500
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New AMD processors can now support following QoS features.=0A=
1. Slow Memory Bandwidth Con=EF=AC=81guration=0A=
   With this feature, the QOS enforcement policies can be applied=0A=
   to the external slow memory connected to the host. QOS enforcement=0A=
   is accomplished by assigning a Class Of Service (COS) to a processor=0A=
   and specifying allocations or limits for that COS for each resource=0A=
   to be allocated.=0A=
=0A=
2. Bandwidth Monitoring Event Configuration (BMEC)=0A=
   The bandwidth monitoring events mbm_total_event and mbm_local_event =0A=
   are set to count all the total and local reads/writes respectively.=0A=
   With the introduction of slow memory, the two counters are not enough=0A=
   to count all the different types are memory events. With the feature=0A=
   BMEC, the users have the option to configure mbm_total_event and=0A=
   mbm_local_event to count the specific type of events.=0A=
=0A=
   Following are the bitmaps of events supported.=0A=
   Bits    Description=0A=
      6       Dirty Victims from the QOS domain to all types of memory=0A=
      5       Reads to slow memory in the non-local NUMA domain=0A=
      4       Reads to slow memory in the local NUMA domain=0A=
      3       Non-temporal writes to non-local NUMA domain=0A=
      2       Non-temporal writes to local NUMA domain=0A=
      1       Reads to memory in the non-local NUMA domain=0A=
      0       Reads to memory in the local NUMA domain=0A=
=0A=
This series adds support for these features.=0A=
=0A=
Feature description is available in the specification, "AMD64 Technology Pl=
atform Quality=0A=
of Service Extensions, Revision: 1.03 Publication # 56375 Revision: 1.03 Is=
sue Date: February 2022".=0A=
=0A=
Link: https://www.amd.com/en/support/tech-docs/amd64-technology-platform-qu=
ality-service-extensions=0A=
Link: https://bugzilla.kernel.org/show_bug.cgi?id=3D206537=0A=
=0A=
Also added a bugfix submitted by Stephane Eranian.=0A=
=0A=
---=0A=
v2:=0A=
  a. Rebased the patches to latest stable tree (v5.18.15). Resolved some co=
nflicts.=0A=
  b. Added the patch to fix CBM issue on AMD. This was originally discussed=
=0A=
     https://lore.kernel.org/lkml/20220517001234.3137157-1-eranian@google.c=
om/=0A=
=0A=
v1:=0A=
  https://lore.kernel.org/lkml/165757543252.416408.13547339307237713464.stg=
it@bmoger-ubuntu/=0A=
=0A=
Babu Moger (10):=0A=
      x86/resctrl: Fix min_cbm_bits for AMD=0A=
      x86/cpufeatures: Add Slow Memory Bandwidth Allocation feature flag=0A=
      x86/resctrl: Add a new resource type RDT_RESOURCE_SMBA=0A=
      x86/resctrl: Detect and configure Slow Memory Bandwidth allocation=0A=
      x86/cpufeatures: Add Bandwidth Monitoring Event Configuration feature=
 flag=0A=
      x86/resctrl: Introduce mon_configurable to detect Bandwidth Monitorin=
g Event Configuration=0A=
      x86/resctrl: Add sysfs interface files to read/write event configurat=
ion=0A=
      x86/resctrl: Add the sysfs interface to read the event configuration=
=0A=
      x86/resctrl: Add sysfs interface to write the event configuration=0A=
      Documentation/x86: Update resctrl_ui.rst for new features=0A=
=0A=
=0A=
 Documentation/x86/resctrl.rst             | 123 +++++++++++=0A=
 arch/x86/include/asm/cpufeatures.h        |   2 +=0A=
 arch/x86/kernel/cpu/resctrl/core.c        |  70 ++++++-=0A=
 arch/x86/kernel/cpu/resctrl/ctrlmondata.c |   2 +-=0A=
 arch/x86/kernel/cpu/resctrl/internal.h    |  26 +++=0A=
 arch/x86/kernel/cpu/resctrl/monitor.c     |  16 ++=0A=
 arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 237 +++++++++++++++++++++-=0A=
 arch/x86/kernel/cpu/scattered.c           |   2 +=0A=
 include/linux/resctrl.h                   |   1 +=0A=
 9 files changed, 469 insertions(+), 10 deletions(-)=0A=
=0A=
--=0A=
Signature=0A=