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From: Ivan Gorinov <ivan.gorinov@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@redhat.com>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH v4 3/4] of: Documentation: Add x86 local APIC ID property
Date: Wed, 7 Mar 2018 11:47:05 -0800	[thread overview]
Message-ID: <3a0359afad71abc0c0d682bfcd0dd66055f5d7e5.1520450752.git.ivan.gorinov@intel.com> (raw)
In-Reply-To: <cover.1520450752.git.ivan.gorinov@intel.com>

Current x86 Device Tree implementation does not support multiprocessing.
Add new "intel,apic-id" property to allow using CPU descriptions
in Device Tree data provided by the U-Boot loader.
Address specified in 'reg' to be used as default local APIC ID
to avoid breaking existing systems with DTB provided by firmware.

Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
---
 Documentation/devicetree/bindings/x86/ce4100.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/x86/ce4100.txt b/Documentation/devicetree/bindings/x86/ce4100.txt
index b49ae59..d15de48 100644
--- a/Documentation/devicetree/bindings/x86/ce4100.txt
+++ b/Documentation/devicetree/bindings/x86/ce4100.txt
@@ -14,11 +14,17 @@ The CPU node
 		compatible = "intel,ce4100";
 		reg = <0>;
 		lapic = <&lapic0>;
+		intel,apic-id = <0>;
 	};
 
 The reg property describes the CPU number. The lapic property points to
 the local APIC timer.
 
+Optional properties:
+
+- intel,apic-id: local APIC ID.
+  The address specified in "reg" is used as default local APIC ID.
+
 The SoC node
 ------------
 
-- 
2.7.4

  parent reply	other threads:[~2018-03-07 19:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-07 19:45 [PATCH v4 0/4] x86/devicetree: Re-enable x86-specific implementation Ivan Gorinov
2018-03-07 19:46 ` [PATCH v4 1/4] x86/devicetree: Initialize device tree before using it Ivan Gorinov
2018-03-08  9:03   ` [tip:x86/platform] " tip-bot for Ivan Gorinov
2018-03-07 19:46 ` [PATCH v4 2/4] x86/devicetree: Fix device IRQ settings in DT Ivan Gorinov
2018-03-08  9:04   ` [tip:x86/platform] " tip-bot for Ivan Gorinov
2018-03-07 19:47 ` Ivan Gorinov [this message]
2018-03-07 20:23   ` [PATCH v4 3/4] of: Documentation: Add x86 local APIC ID property Rob Herring
2018-03-08  1:11     ` Ivan Gorinov
2018-03-08  1:34       ` Rob Herring
2018-03-07 19:47 ` [PATCH v4 4/4] x86/devicetree: Enable multiprocessing in DT Ivan Gorinov
2018-03-08  2:16 ` [PATCH v4 0/4] x86/devicetree: Re-enable x86-specific implementation Frank Rowand
2018-03-13 16:08   ` Andy Shevchenko

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