+ x86-numa-add-nohmat-option.patch added to -mm tree

+ x86-numa-add-nohmat-option.patch added to -mm tree

[akpm]

The patch titled
     Subject: x86/numa: add 'nohmat' option
has been added to the -mm tree.  Its filename is
     x86-numa-add-nohmat-option.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/x86-numa-add-nohmat-option.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/x86-numa-add-nohmat-option.patch

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------------------------------------------------------
From: Dan Williams <dan.j.williams@intel.com>
Subject: x86/numa: add 'nohmat' option

Disable parsing of the HMAT for debug, to workaround broken platform
instances, or cases where it is otherwise not wanted.

Link: https://lkml.kernel.org/r/159643095540.4062302.732962081968036212.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: David Hildenbrand <david@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Jia He <justin.he@arm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/x86/x86_64/boot-options.rst |    4 ++++
 arch/x86/mm/numa.c                        |    2 ++
 drivers/acpi/numa/hmat.c                  |    8 +++++++-
 include/acpi/acpi_numa.h                  |    8 ++++++++
 4 files changed, 21 insertions(+), 1 deletion(-)

--- a/arch/x86/mm/numa.c~x86-numa-add-nohmat-option
+++ a/arch/x86/mm/numa.c
@@ -41,6 +41,8 @@ static __init int numa_setup(char *opt)
 		return numa_emu_cmdline(opt + 5);
 	if (!strncmp(opt, "noacpi", 6))
 		disable_srat();
+	if (!strncmp(opt, "nohmat", 6))
+		disable_hmat();
 	return 0;
 }
 early_param("numa", numa_setup);
--- a/Documentation/x86/x86_64/boot-options.rst~x86-numa-add-nohmat-option
+++ a/Documentation/x86/x86_64/boot-options.rst
@@ -173,6 +173,10 @@ NUMA
   numa=noacpi
     Don't parse the SRAT table for NUMA setup
 
+  numa=nohmat
+    Don't parse the HMAT table for NUMA setup, or soft-reserved memory
+    partitioning.
+
   numa=fake=<size>[MG]
     If given as a memory unit, fills all system RAM with nodes of
     size interleaved over physical nodes.
--- a/drivers/acpi/numa/hmat.c~x86-numa-add-nohmat-option
+++ a/drivers/acpi/numa/hmat.c
@@ -26,6 +26,12 @@
 #include <linux/sysfs.h>
 
 static u8 hmat_revision;
+static int hmat_disable __initdata;
+
+void __init disable_hmat(void)
+{
+	hmat_disable = 1;
+}
 
 static LIST_HEAD(targets);
 static LIST_HEAD(initiators);
@@ -814,7 +820,7 @@ static __init int hmat_init(void)
 	enum acpi_hmat_type i;
 	acpi_status status;
 
-	if (srat_disabled())
+	if (srat_disabled() || hmat_disable)
 		return 0;
 
 	status = acpi_get_table(ACPI_SIG_SRAT, 0, &tbl);
--- a/include/acpi/acpi_numa.h~x86-numa-add-nohmat-option
+++ a/include/acpi/acpi_numa.h
@@ -27,4 +27,12 @@ static inline void disable_srat(void)
 {
 }
 #endif				/* CONFIG_ACPI_NUMA */
+
+#ifdef CONFIG_ACPI_HMAT
+extern void disable_hmat(void);
+#else				/* CONFIG_ACPI_HMAT */
+static inline void disable_hmat(void)
+{
+}
+#endif				/* CONFIG_ACPI_HMAT */
 #endif				/* __ACP_NUMA_H */
_

Patches currently in -mm which might be from dan.j.williams@intel.com are

x86-numa-cleanup-configuration-dependent-command-line-options.patch
x86-numa-add-nohmat-option.patch
efi-fake_mem-arrange-for-a-resource-entry-per-efi_fake_mem-instance.patch
acpi-hmat-refactor-hmat_register_target_device-to-hmem_register_device.patch
resource-report-parent-to-walk_iomem_res_desc-callback.patch
mm-memory_hotplug-introduce-default-phys_to_target_node-implementation.patch
acpi-hmat-attach-a-device-for-each-soft-reserved-range.patch
device-dax-drop-the-dax_regionpfn_flags-attribute.patch
device-dax-move-instance-creation-parameters-to-struct-dev_dax_data.patch
device-dax-make-pgmap-optional-for-instance-creation.patch
device-dax-kill-dax_kmem_res.patch
device-dax-add-an-allocation-interface-for-device-dax-instances.patch
device-dax-introduce-seed-devices.patch
drivers-base-make-device_find_child_by_name-compatible-with-sysfs-inputs.patch
device-dax-add-resize-support.patch
mm-memremap_pages-convert-to-struct-range.patch
mm-memremap_pages-support-multiple-ranges-per-invocation.patch
device-dax-add-dis-contiguous-resource-support.patch
device-dax-introduce-mapping-devices.patch