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From: Timur Tabi <timur@codeaurora.org>
To: Prarit Bhargava <prarit@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-pm@vger.kernel.org, linux-serial@vger.kernel.org,
	Bhupesh Sharma <bhsharma@redhat.com>,
	Lv Zheng <lv.zheng@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Jonathan Corbet <corbet@lwn.net>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	graeme.gregory@linaro.org, mark.salter@redhat.com
Subject: Re: [PATCH] acpi, spcr: Make SPCR available to x86
Date: Mon, 12 Feb 2018 08:43:45 -0600	[thread overview]
Message-ID: <953565bd-436b-c1fe-d3c5-cde731dee83d@codeaurora.org> (raw)
In-Reply-To: <1e69fffc-1c3b-8cc0-f1cb-695de5ccdcb5@redhat.com>

On 2/12/18 7:47 AM, Prarit Bhargava wrote:
> ACPI SPCR is used by a vendor to define the serial console for a system.  If
> SPCR exists a user can add kernel parameter "earlycon" (no extra kernel
> parameters) and the console will work out-of-the-box.

"earlycon" is needed only for an *early* console.  You don't need any 
command line parameters for a normal console to work with SPCR.

-- 
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc.  Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.

WARNING: multiple messages have this Message-ID (diff)
From: timur@codeaurora.org (Timur Tabi)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] acpi, spcr: Make SPCR available to x86
Date: Mon, 12 Feb 2018 08:43:45 -0600	[thread overview]
Message-ID: <953565bd-436b-c1fe-d3c5-cde731dee83d@codeaurora.org> (raw)
In-Reply-To: <1e69fffc-1c3b-8cc0-f1cb-695de5ccdcb5@redhat.com>

On 2/12/18 7:47 AM, Prarit Bhargava wrote:
> ACPI SPCR is used by a vendor to define the serial console for a system.  If
> SPCR exists a user can add kernel parameter "earlycon" (no extra kernel
> parameters) and the console will work out-of-the-box.

"earlycon" is needed only for an *early* console.  You don't need any 
command line parameters for a normal console to work with SPCR.

-- 
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc.  Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.

  reply	other threads:[~2018-02-12 14:43 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-18 15:09 [PATCH] acpi, spcr: Make SPCR available to x86 Prarit Bhargava
2018-01-18 15:09 ` Prarit Bhargava
2018-01-18 15:09 ` Prarit Bhargava
2018-01-20 14:33 ` Ingo Molnar
2018-01-20 14:33   ` Ingo Molnar
2018-01-21 23:21 ` Mark Salter
2018-01-21 23:21   ` Mark Salter
2018-01-22 21:49 ` Timur Tabi
2018-01-22 21:49   ` Timur Tabi
2018-01-23 12:41   ` Prarit Bhargava
2018-01-23 12:41     ` Prarit Bhargava
2018-02-12 13:34 ` Peter Zijlstra
2018-02-12 13:34   ` Peter Zijlstra
2018-02-12 13:47   ` Prarit Bhargava
2018-02-12 13:47     ` Prarit Bhargava
2018-02-12 14:43     ` Timur Tabi [this message]
2018-02-12 14:43       ` Timur Tabi
2018-02-12 14:49       ` Prarit Bhargava
2018-02-12 14:49         ` Prarit Bhargava
2018-02-12 15:10         ` Timur Tabi
2018-02-12 15:10           ` Timur Tabi
2018-02-12 14:56     ` Peter Zijlstra
2018-02-12 14:56       ` Peter Zijlstra
2018-02-12 15:18       ` Prarit Bhargava
2018-02-12 15:18         ` Prarit Bhargava
2018-02-12 15:44         ` Peter Zijlstra
2018-02-12 15:44           ` Peter Zijlstra
2018-02-12 15:54           ` Prarit Bhargava
2018-02-12 15:54             ` Prarit Bhargava

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