linux.git/Documentation/x86, branch v5.12.5

Documentation/x86/boot.rst: Correct the example of SETUP_INDIRECT

2021-01-28T22:25:31+00:00

struct setup_data.len is the length of data field. In case of
SETUP_INDIRECT, it should be sizeof(setup_indirect).

Signed-off-by: Cao jin 
Reviewed-by: Daniel Kiper 
Link: https://lore.kernel.org/r/20210127084911.63438-1-jojing64@gmail.com
Signed-off-by: Jonathan Corbet

Merge tag 'docs-5.11' of git://git.lwn.net/linux

2020-12-15T00:55:54+00:00

Pull documentation updates from Jonathan Corbet:
 "A much quieter cycle for documentation (happily), with, one hopes, the
  bulk of the churn behind us. Significant stuff in this pull includes:

   - A set of new Chinese translations

   - Italian translation updates

   - A mechanism from Mauro to automatically format
     Documentation/features for the built docs

   - Automatic cross references without explicit :ref: markup

   - A new reset-controller document

   - An extensive new document on reporting problems from Thorsten

  That last patch also adds the CC-BY-4.0 license to LICENSES/dual;
  there was some discussion on this, but we seem to have consensus and
  an ack from Greg for that addition"

* tag 'docs-5.11' of git://git.lwn.net/linux: (50 commits)
  docs: fix broken cross reference in translations/zh_CN
  docs: Note that sphinx 1.7 will be required soon
  docs: update requirements to install six module
  docs: reporting-issues: move 'outdated, need help' note to proper place
  docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC means
  docs: add a reset controller chapter to the driver API docs
  docs: make reporting-bugs.rst obsolete
  docs: Add a new text describing how to report bugs
  LICENSES: Add the CC-BY-4.0 license
  Documentation: fix multiple typos found in the admin-guide subdirectory
  Documentation: fix typos found in admin-guide subdirectory
  kernel-doc: Fix example in Nested structs/unions
  docs: clean up sysctl/kernel: titles, version
  docs: trace: fix event state structure name
  docs: nios2: add missing ReST file
  scripts: get_feat.pl: reduce table width for all features output
  scripts: get_feat.pl: change the group by order
  scripts: get_feat.pl: make complete table more coincise
  scripts: kernel-doc: fix parsing function-like typedefs
  Documentation: fix typos found in process, dev-tools, and doc-guide subdirectories
  ...

Merge tag 'x86_cache_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-12-14T21:53:17+00:00

Pull x86 cache resource control updates from Borislav Petkov:

 - add logic to correct MBM total and local values fixing errata SKX99
   and BDF102 (Fenghua Yu)

 - cleanups

* tag 'x86_cache_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/resctrl: Clean up unused function parameter in rmdir path
  x86/resctrl: Constify kernfs_ops
  x86/resctrl: Correct MBM total and local values
  Documentation/x86: Rename resctrl_ui.rst and add two errata to the file

Merge tag 'x86_cpu_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-12-14T21:21:33+00:00

Pull x86 cpuid updates from Borislav Petkov:
 "Only AMD-specific changes this time:

   - Save the AMD physical die ID into cpuinfo_x86.cpu_die_id and
     convert all code to use it (Yazen Ghannam)

   - Remove a dead and unused TSEG region remapping workaround on AMD
     (Arvind Sankar)"

* tag 'x86_cpu_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu/amd: Remove dead code for TSEG region remapping
  x86/topology: Set cpu_die_id only if DIE_TYPE found
  EDAC/mce_amd: Use struct cpuinfo_x86.cpu_die_id for AMD NodeId
  x86/CPU/AMD: Remove amd_get_nb_id()
  x86/CPU/AMD: Save AMD NodeId as cpu_die_id

docs: archis: add a per-architecture features list

2020-12-03T22:10:15+00:00

Add a feature list matrix for each architecture to their
respective Kernel books.

Signed-off-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/9c39d4dd93e05c0008205527d2c3450912f029ed.1606748711.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet

x86/CPU/AMD: Save AMD NodeId as cpu_die_id

2020-11-19T10:43:13+00:00

AMD systems provide a "NodeId" value that represents a global ID
indicating to which "Node" a logical CPU belongs. The "Node" is a
physical structure equivalent to a Die, and it should not be confused
with logical structures like NUMA nodes. Logical nodes can be adjusted
based on firmware or other settings whereas the physical nodes/dies are
fixed based on hardware topology.

The NodeId value can be used when a physical ID is needed by software.

Save the AMD NodeId to struct cpuinfo_x86.cpu_die_id. Use the value
from CPUID or MSR as appropriate. Default to phys_proc_id otherwise.
Do so for both AMD and Hygon systems.

Drop the node_id parameter from cacheinfo_*_init_llc_id() as it is no
longer needed.

Update the x86 topology documentation.

Suggested-by: Borislav Petkov 
Signed-off-by: Yazen Ghannam 
Signed-off-by: Borislav Petkov 
Link: https://lkml.kernel.org/r/20201109210659.754018-2-Yazen.Ghannam@amd.com

Documentation/x86: Document SGX kernel architecture

2020-11-18T17:16:13+00:00

Document the Intel SGX kernel architecture. The fine-grained architecture
details can be looked up from Intel SDM Volume 3D.

Co-developed-by: Sean Christopherson 
Signed-off-by: Sean Christopherson 
Signed-off-by: Jarkko Sakkinen 
Signed-off-by: Borislav Petkov 
Acked-by: Jethro Beekman 
Cc: linux-doc@vger.kernel.org
Link: https://lkml.kernel.org/r/20201112220135.165028-24-jarkko@kernel.org

Documentation/x86: Rename resctrl_ui.rst and add two errata to the file

2020-10-27T15:47:00+00:00

Intel Memory Bandwidth Monitoring (MBM) counters may report system
memory bandwidth incorrectly on some Intel processors. This is reported
in documented in erratum SKX99, erratum BDF102 and in the RDT reference
manual, see Documentation/x86/index.rst.

To work around the errata, MBM total and local readings are corrected
using a correction factor table.

Since the correction factor table is not publicly documented anywhere,
document the table and the errata in Documentation/x86/resctrl.rst for
future reference.

 [ bp: Move web links to the doc, massage. ]

Suggested-by: Borislav Petkov 
Signed-off-by: Fenghua Yu 
Signed-off-by: Borislav Petkov 
Reviewed-by: Tony Luck 
Link: https://lkml.kernel.org/r/20201014004927.1839452-2-fenghua.yu@intel.com

Merge tag 'docs-5.10-2' of git://git.lwn.net/linux

2020-10-24T00:13:53+00:00

Pull documentation fixes from Jonathan Corbet:
 "A handful of late-arriving documentation fixes"

* tag 'docs-5.10-2' of git://git.lwn.net/linux:
  docs: Add two missing entries in vm sysctl index
  docs/vm: trivial fixes to several spelling mistakes
  docs: submitting-patches: describe preserving review/test tags
  Documentation: Chinese translation of Documentation/arm64/hugetlbpage.rst
  Documentation: x86: fix a missing word in x86_64/mm.rst.
  docs: driver-api: remove a duplicated index entry
  docs: lkdtm: Modernize and improve details
  docs: deprecated.rst: Expand str*cpy() replacement notes
  docs/cpu-load: format the example code.

Documentation: x86: fix a missing word in x86_64/mm.rst.

2020-10-21T21:14:36+00:00

This patch adds a missing word in x86/x86_64/mm.rst, without which
the note reads awkwardly.

Signed-off-by: Wei Lin Chang 
Link: https://lore.kernel.org/r/20201015062242.26296-1-r09922117@csie.ntu.edu.tw
Signed-off-by: Jonathan Corbet