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From: Atish Patra <atishp@atishpatra.org>
To: Emil Renner Berthing <emil.renner.berthing@gmail.com>
Cc: Atish Patra <atish.patra@wdc.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Gary Guo <gary@garyguo.net>,
	Nick Hu <nickhu@andestech.com>, Anup Patel <anup@brainfault.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Mike Rapoport <rppt@linux.ibm.com>,
	Vincent Chen <vincent.chen@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>, Zong Li <zong.li@sifive.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Greentime Hu <greentime.hu@sifive.com>,
	linux-riscv <linux-riscv@lists.infradead.org>,
	Bin Meng <bmeng.cn@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>, Mao Han <han_mao@c-sky.com>
Subject: Re: [PATCH v11 00/11] Add support for SBI v0.2 and CPU hotplug
Date: Sun, 22 Mar 2020 20:03:17 -0700	[thread overview]
Message-ID: <CAOnJCULYLBV0O+xrgnCkv6FgFC2wz0U54uYV7S5hkBfQf+7vRg@mail.gmail.com> (raw)
In-Reply-To: <CANBLGcxB7Tf7wmkDnjsiEpmo6djwzN2DEjGqPfCt4LG6wcjLbQ@mail.gmail.com>

On Sun, Mar 22, 2020 at 10:49 AM Emil Renner Berthing
<emil.renner.berthing@gmail.com> wrote:
>
> Hi Atish,
>
> On Wed, 18 Mar 2020 at 02:12, Atish Patra <atish.patra@wdc.com> wrote:
> >
> > The Supervisor Binary Interface(SBI) specification[1] now defines a
> > base extension that provides extendability to add future extensions
> > while maintaining backward compatibility with previous versions.
> > The new version is defined as 0.2 and older version is marked as 0.1.
> >
> > This series adds following features to RISC-V Linux.
> > 1. Adds support for SBI v0.2
> > 2. A Unified calling convention implementation between 0.1 and 0.2.
> > 3. SBI Hart state management extension (HSM)
> > 4. Ordered booting of harts
> > 4. CPU hotplug
>
> If it's any help I tried this series with both OpenSBI v0.6 and master
> (9a74a64ae08),
> and in both cases Linux found all four cpus. I can test the hotplug
> stuff too if you send
> me instructions. In any case you can add my
>
> Tested-by: Emil Renner Berthing <kernel@esmil.dk>
>

Thanks for testing the patches. Here are the steps to online/offline a cpu.

To mark a cpu offline
$echo 0 > /sys/devices/system/cpu/cpuX/online

To mark a cpu online
$echo 1 > /sys/devices/system/cpu/cpuX/online

Here are the official kernel documentation.
https://www.kernel.org/doc/html/latest/core-api/cpu_hotplug.html

> /Emil
>


-- 
Regards,
Atish

  reply	other threads:[~2020-03-23  3:03 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-18  1:11 [PATCH v11 00/11] Add support for SBI v0.2 and CPU hotplug Atish Patra
2020-03-18  1:11 ` [PATCH v11 01/11] RISC-V: Mark existing SBI as 0.1 SBI Atish Patra
2020-04-05 14:36   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 02/11] RISC-V: Add basic support for SBI v0.2 Atish Patra
2020-04-05 14:36   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 03/11] RISC-V: Add SBI v0.2 extension definitions Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 04/11] RISC-V: Introduce a new config for SBI v0.1 Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 05/11] RISC-V: Implement new SBI v0.2 extensions Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 06/11] RISC-V: Move relocate and few other functions out of __init Atish Patra
2020-03-18  1:11 ` [PATCH v11 07/11] RISC-V: Add cpu_ops and modify default booting method Atish Patra
2020-03-18  1:11 ` [PATCH v11 08/11] RISC-V: Export SBI error to linux error mapping function Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 09/11] RISC-V: Add SBI HSM extension definitions Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 10/11] RISC-V: Add supported for ordered booting method using HSM Atish Patra
2020-04-05 14:37   ` Bin Meng
2020-03-18  1:11 ` [PATCH v11 11/11] RISC-V: Support cpu hotplug Atish Patra
2020-03-31 18:35   ` Palmer Dabbelt
2020-03-22 17:49 ` [PATCH v11 00/11] Add support for SBI v0.2 and CPU hotplug Emil Renner Berthing
2020-03-23  3:03   ` Atish Patra [this message]
2020-03-31 18:35 ` Palmer Dabbelt
2020-04-01  0:43   ` Atish Patra

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