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From: Aurelien Jarno <aurelien@aurel32.net>
To: linux-riscv@lists.infradead.org
Subject: Fail to bring hart online on HiFive Unleashed
Date: Thu, 3 Oct 2019 22:07:35 +0200	[thread overview]
Message-ID: <20191003200735.GA26760@aurel32.net> (raw)

Hi all,

I have just upgraded the bootloaders and kernel on an HiFive Unleashed
board to:
- OpenSBI v0.4-50-g30f09fb 
- U-Boot 2019.10-rc4
- Linux v5.3.2

Most of the time, the kernel only brings online 3 of the 4 RV64GC harts:
| # getconf _NPROCESSORS_CONF
| 4
| # getconf _NPROCESSORS_ONLN
| 3

This can also be seen in /proc/cpuinfo:

| processor       : 0
| hart            : 1
| isa             : rv64imafdc
| mmu             : sv39
| uarch           : sifive,u54-mc
|
| processor       : 1
| hart            : 2
| isa             : rv64imafdc
| mmu             : sv39
| uarch           : sifive,u54-mc
|
| processor       : 3
| hart            : 4
| isa             : rv64imafdc
| mmu             : sv39
| uarch           : sifive,u54-mc

When it happens, the kernel logs contain:

| [    0.049851] smp: Bringing up secondary CPUs ...
| [    1.082530] CPU2: failed to come online
| [    1.086267] smp: Brought up 1 node, 3 CPUs

I have also seen the issue with CPU1 but not with CPU3 and CPU4 (might
be a statistical effect).

Any idea what could be the issue?

Thanks,
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net

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             reply	other threads:[~2019-10-03 20:07 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-03 20:07 Aurelien Jarno [this message]
2019-10-03 23:13 ` Fail to bring hart online on HiFive Unleashed Atish Patra
2019-10-03 23:16   ` Troy Benjegerdes
2019-10-05 10:25   ` Aurelien Jarno
2019-10-05 10:54     ` Aurelien Jarno
2019-10-06 12:28     ` Aurelien Jarno
2019-10-07 22:19       ` Atish Patra
2019-10-08  4:30         ` Aurelien Jarno
2019-10-08  6:14           ` David Abdurachmanov
2019-10-08  6:33             ` Aurelien Jarno
2019-10-08  7:17               ` Anup Patel
2019-10-08 22:21               ` Troy Benjegerdes
2019-10-10 19:59                 ` Aurelien Jarno
2019-10-11 14:05                   ` David Abdurachmanov
2019-10-09  1:34               ` Atish Patra
2019-10-10 19:58                 ` Aurelien Jarno
2019-10-15 21:38                   ` Auer, Lukas
2019-10-15 22:22                     ` Aurelien Jarno
2019-10-16 20:49                       ` Auer, Lukas
2019-10-17 15:45                         ` David Abdurachmanov
2019-10-17 20:42                         ` Aurelien Jarno
2019-10-20 18:57                           ` Auer, Lukas
2019-10-08  7:06           ` Anup Patel
2019-10-14  9:23 ` Andreas Schwab

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