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From: Bin Meng <bmeng.cn@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH v4 10/25] x86: mp: Support APs waiting for instructions
Date: Mon, 13 Jul 2020 12:48:35 +0800	[thread overview]
Message-ID: <CAEUhbmUHu1gH4xqM3-kxXdMaMNV4VTLgX4t9Pha00JwZ2-68NQ@mail.gmail.com> (raw)
In-Reply-To: <20200707193423.v4.10.I5cdb6d2b53a528eaebda2227b8cdfe26c4c73ceb@changeid>

On Wed, Jul 8, 2020 at 9:37 AM Simon Glass <sjg@chromium.org> wrote:
>
> At present the APs (non-boot CPUs) are inited once and then parked ready
> for the OS to use them. However in some cases we want to send new requests
> through, such as to change MTRRs and keep them consistent across CPUs.
>
> Change the last state of the flight plan to go into a wait loop, accepting
> instructions from the main CPU.
>
> Drop cpu_map since it is not used.
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
> ---
>
> Changes in v4:
> - Add a Kconfig to control this feature, enabled only on APL
>
> Changes in v3:
> - s/slow/slot/
> - Use C code instead of assembler to read/write callback pointers
> - Update commit message to mention dropping of cpu_map
>
> Changes in v2:
> - Add more comments
>
>  arch/x86/Kconfig                |   7 ++
>  arch/x86/cpu/apollolake/Kconfig |   1 +
>  arch/x86/cpu/mp_init.c          | 123 +++++++++++++++++++++++++++++---
>  arch/x86/include/asm/mp.h       |  11 +++
>  4 files changed, 134 insertions(+), 8 deletions(-)
>

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

  reply	other threads:[~2020-07-13  4:48 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-08  1:34 [PATCH v4 00/25] x86: Enhance MTRR functionality to support multiple CPUs Simon Glass
2020-07-08  1:34 ` [PATCH v4 01/25] x86: mp_init: Switch to livetree Simon Glass
2020-07-08  1:34 ` [PATCH v4 02/25] x86: Move MP code into mp_init Simon Glass
2020-07-08  1:34 ` [PATCH v4 03/25] x86: mp_init: Avoid declarations in header files Simon Glass
2020-07-08  1:34 ` [PATCH v4 04/25] x86: mp_init: Switch parameter names in start_aps() Simon Glass
2020-07-08  1:34 ` [PATCH v4 05/25] x86: mp_init: Drop the num_cpus static variable Simon Glass
2020-07-08  1:34 ` [PATCH v4 06/25] x86: mtrr: Fix 'ensable' typo Simon Glass
2020-07-08  1:34 ` [PATCH v4 07/25] x86: mp_init: Set up the CPU numbers at the start Simon Glass
2020-07-08  1:34 ` [PATCH v4 08/25] x86: mp_init: Adjust bsp_init() to return more information Simon Glass
2020-07-08  1:34 ` [PATCH v4 09/25] x86: cpu: Remove unnecessary #ifdefs Simon Glass
2020-07-08  1:34 ` [PATCH v4 10/25] x86: mp: Support APs waiting for instructions Simon Glass
2020-07-13  4:48   ` Bin Meng [this message]
2020-07-08  1:34 ` [PATCH v4 11/25] global_data: Add a generic global_data flag for SMP state Simon Glass
2020-07-13  4:49   ` Bin Meng
2020-07-08  1:34 ` [PATCH v4 12/25] x86: Set the SMP flag when MP init is complete Simon Glass
2020-07-08  1:34 ` [PATCH v4 13/25] x86: mp: Allow running functions on multiple CPUs Simon Glass
2020-07-13  4:56   ` Bin Meng
2020-07-13 20:57     ` Simon Glass
2020-07-08  1:34 ` [PATCH v4 14/25] x86: mp: Park CPUs before running the OS Simon Glass
2020-07-08  1:34 ` [PATCH v4 15/25] x86: mp: Add iterators for CPUs Simon Glass
2020-07-13  4:57   ` Bin Meng
2020-07-08  1:34 ` [PATCH v4 16/25] x86: mtrr: Use MP calls to list the MTRRs Simon Glass
2020-07-08  1:34 ` [PATCH v4 17/25] x86: Don't enable SMP in SPL Simon Glass
2020-07-08  1:34 ` [PATCH v4 18/25] x86: coral: Update the memory map Simon Glass
2020-07-08  1:34 ` [PATCH v4 19/25] x86: mtrr: Update MTRRs on all CPUs Simon Glass
2020-07-13  4:58   ` Bin Meng
2020-07-08  1:34 ` [PATCH v4 20/25] x86: mtrr: Add support for writing to MTRRs on any CPU Simon Glass
2020-07-08  1:34 ` [PATCH v4 21/25] x86: mtrr: Update the command to use the new mtrr calls Simon Glass
2020-07-08  1:34 ` [PATCH v4 22/25] x86: mtrr: Restructure so command execution is in one place Simon Glass
2020-07-08  1:34 ` [PATCH v4 23/25] x86: mtrr: Update 'mtrr' to allow setting MTRRs on any CPU Simon Glass
2020-07-08  1:34 ` [PATCH v4 24/25] x86: mp: Add more comments to the module Simon Glass
2020-07-08  1:34 ` [PATCH v4 25/25] x86: mtrr: Enhance 'mtrr' command to list MTRRs on any CPU Simon Glass
2020-07-13  5:11   ` Bin Meng
2020-07-17  3:24 ` [PATCH v4 00/25] x86: Enhance MTRR functionality to support multiple CPUs Simon Glass
2020-07-17  4:50   ` Bin Meng

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