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From: Bin Meng <bmeng.cn@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH 07/17] x86: Update the MP constants to avoid conflicts
Date: Thu, 8 Apr 2021 10:43:01 +0800	[thread overview]
Message-ID: <CAEUhbmXXmc=bmGQFN2J9h=otkYAosckbfdpxC_BCaAurme8EoA@mail.gmail.com> (raw)
In-Reply-To: <20210407043228.2268429-7-sjg@chromium.org>

On Wed, Apr 7, 2021 at 12:33 PM Simon Glass <sjg@chromium.org> wrote:
>
> These constants conflict with error codes returned by the MP
> implementation when something is wrong. In particular, mp_first_cpu()
> returns MP_SELECT_BSP when running without multiprocessing enabled.
> Since this is -2, it is interpreted as an error by callers, which
> expect a positive CPU number for the first CPU.
>
> Correct this by using a different range for the pre-defined CPU
> numbers, above zero and out of the range of possible CPU values. For
> now it is safe to assume there are no more than 64K CPUs.
>
> This fixes the 'mtrr' command when CONFIG_SMP is not enabled.
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>
>  arch/x86/include/asm/mp.h | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>

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

  reply	other threads:[~2021-04-08  2:43 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-07  4:32 [PATCH 00/17] misc: Some more misc patches Simon Glass
2021-04-07  4:32 ` [PATCH 01/17] pci: Use const for pci_find_device_id() etc Simon Glass
2021-04-08  2:29   ` Bin Meng
2021-04-07  4:32 ` [PATCH 02/17] x86: pci: Allow binding of some devices before relocation Simon Glass
2021-04-08  2:16   ` Bin Meng
2021-04-24  4:56     ` Simon Glass
2021-04-07  4:32 ` [PATCH 03/17] x86: Allow coreboot serial driver to guess the UART Simon Glass
2021-04-08  2:22   ` Bin Meng
2021-04-24  4:56     ` Simon Glass
2021-04-25  1:49       ` Bin Meng
2021-04-25  2:09         ` Simon Glass
2021-04-26  1:21           ` Bin Meng
2021-04-29 16:10             ` Simon Glass
2021-04-29 23:01               ` Bin Meng
2021-04-30 18:13                 ` Simon Glass
2021-04-30 18:41                   ` Andy Shevchenko
2021-05-04 15:26                     ` Simon Glass
2021-05-04 16:48                       ` Andy Shevchenko
2021-05-08  1:42                       ` Simon Glass
2021-05-08  1:47                         ` Bin Meng
2021-05-08  2:12                           ` Simon Glass
2021-05-08  2:26                             ` Bin Meng
2021-04-07  4:32 ` [PATCH 04/17] spi: ich: Don't require the PCH Simon Glass
2021-04-08  2:28   ` Bin Meng
2021-04-24  4:56     ` Simon Glass
2021-04-07  4:32 ` [PATCH 05/17] tpm: cr50: Drop unnecessary coral headers Simon Glass
2021-04-08  2:29   ` Bin Meng
2021-04-07  4:32 ` [PATCH 06/17] x86: Don't set up MTRRs if previously done Simon Glass
2021-04-08  2:42   ` Bin Meng
2021-04-07  4:32 ` [PATCH 07/17] x86: Update the MP constants to avoid conflicts Simon Glass
2021-04-08  2:43   ` Bin Meng [this message]
2021-04-07  4:32 ` [PATCH 08/17] x86: Do cache set-up by default when booting from coreboot Simon Glass
2021-04-08  2:43   ` Bin Meng
2021-04-07  4:32 ` [PATCH 09/17] x86: coreboot: Show the BIOS date Simon Glass
2021-04-08  2:43   ` Bin Meng
2021-04-07  4:32 ` [PATCH 10/17] x86: coral: Allow booting from coreboot Simon Glass
2021-04-08  2:43   ` Bin Meng
2021-04-07  4:32 ` [PATCH 11/17] x86: Add function comments to cb_sysinfo.h Simon Glass
2021-04-08  2:59   ` Bin Meng
2021-04-07  4:32 ` [PATCH 12/17] x86: coreboot: Use vendor in the Kconfig Simon Glass
2021-04-08  2:59   ` Bin Meng
2021-04-24  4:56     ` Simon Glass
2021-04-07  4:32 ` [PATCH 13/17] x86: coreboot: Enable the cbsysinfo command Simon Glass
2021-04-08  2:59   ` Bin Meng
2021-04-07  4:32 ` [PATCH 14/17] x86: coreboot: Document the memory map Simon Glass
2021-04-08  2:59   ` Bin Meng
2021-04-07  4:32 ` [PATCH 15/17] x86: Check ROM exists before building vboot Simon Glass
2021-04-08  2:59   ` Bin Meng
2021-04-08 22:07   ` Jaehoon Chung
2021-04-07  4:32 ` [PATCH 16/17] dtoc: Check that a parent is not missing Simon Glass
2021-04-07  4:32 ` [PATCH 17/17] doc: Update documentation for cros-2021.04 release Simon Glass
2021-04-08  3:02   ` Bin Meng
2021-04-24  4:56     ` Simon Glass

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