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From: Dan Williams <dan.j.williams@intel.com>
To: linux-acpi@vger.kernel.org
Cc: x86@kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	ard.biesheuvel@linaro.org, linux-nvdimm@lists.01.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/5] ACPI: NUMA: Add 'nohmat' option
Date: Mon, 02 Mar 2020 14:20:03 -0800	[thread overview]
Message-ID: <158318760361.2216124.13612198312947463590.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <158318759687.2216124.4684754859068906007.stgit@dwillia2-desk3.amr.corp.intel.com>

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

Cc: x86@kernel.org
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>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 arch/x86/mm/numa.c       |    4 ++++
 drivers/acpi/numa/hmat.c |    3 ++-
 include/acpi/acpi_numa.h |    1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 59ba008504dc..22de2e2610c1 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -44,6 +44,10 @@ static __init int numa_setup(char *opt)
 #ifdef CONFIG_ACPI_NUMA
 	if (!strncmp(opt, "noacpi", 6))
 		acpi_numa = -1;
+#ifdef CONFIG_ACPI_HMAT
+	if (!strncmp(opt, "nohmat", 6))
+		hmat_disable = 1;
+#endif
 #endif
 	return 0;
 }
diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 2c32cfb72370..d3db121e393a 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -26,6 +26,7 @@
 #include <linux/sysfs.h>
 
 static u8 hmat_revision;
+int hmat_disable __initdata;
 
 static LIST_HEAD(targets);
 static LIST_HEAD(initiators);
@@ -814,7 +815,7 @@ 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);
diff --git a/include/acpi/acpi_numa.h b/include/acpi/acpi_numa.h
index fdebcfc6c8df..48ca468e9b61 100644
--- a/include/acpi/acpi_numa.h
+++ b/include/acpi/acpi_numa.h
@@ -18,6 +18,7 @@ extern int node_to_pxm(int);
 extern int acpi_map_pxm_to_node(int);
 extern unsigned char acpi_srat_revision;
 extern int acpi_numa __initdata;
+extern int hmat_disable __initdata;
 
 extern void bad_srat(void);
 extern int srat_disabled(void);
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  reply	other threads:[~2020-03-02 22:36 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-02 22:19 [PATCH 0/5] Manual definition of Soft Reserved memory devices Dan Williams
2020-03-02 22:20 ` Dan Williams [this message]
2020-03-18  0:08   ` [PATCH 1/5] ACPI: NUMA: Add 'nohmat' option Dan Williams
2020-03-18  8:24     ` Rafael J. Wysocki
2020-03-18 17:39       ` Dan Williams
2020-03-19  9:30         ` Rafael J. Wysocki
2020-03-02 22:20 ` [PATCH 2/5] efi/fake_mem: Arrange for a resource entry per efi_fake_mem instance Dan Williams
2020-03-03  8:01   ` Ard Biesheuvel
2020-03-02 22:20 ` [PATCH 3/5] ACPI: HMAT: Refactor hmat_register_target_device to hmem_register_device Dan Williams
2020-03-02 22:20 ` [PATCH 4/5] resource: Report parent to walk_iomem_res_desc() callback Dan Williams
2020-03-05 14:42   ` Tom Lendacky
2020-03-17 22:04     ` Dan Williams
2020-03-02 22:20 ` [PATCH 5/5] ACPI: HMAT: Attach a device for each soft-reserved range Dan Williams
2020-03-06 20:07 ` [PATCH 0/5] Manual definition of Soft Reserved memory devices Jeff Moyer
2020-03-06 21:05   ` Dan Williams

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