From: Guo Ren <ren_guo@c-sky.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Jason Cooper <jason@lakedaemon.net>,
c-sky_gcc_upstream@c-sky.com, gnu-csky@mentor.com,
thomas.petazzoni@bootlin.com, wbx@uclibc-ng.org
Subject: Re: [PATCH 15/19] csky: Build infrastructure
Date: Wed, 28 Mar 2018 16:04:53 +0800 [thread overview]
Message-ID: <20180328080452.GA12230@guoren> (raw)
In-Reply-To: <CAK8P3a3NRtqGVrSiUwD0kUL7kC0=P1uTakcbaGtWRSssXs7L8w@mail.gmail.com>
Hi Arnd,
On Wed, Mar 28, 2018 at 09:40:49AM +0200, Arnd Bergmann wrote:
> Ok, thanks for the clarification. Obviously if they are mutually incompatible,
> there is no point in using a common kernel, so your current version is
> absolutely fine, and this is similar to how we cannot have a common kernel
> between ARMv5, ARMv7-A and ARMv7-M, which are all incompatible
> at the kernel level.
Yes.
> One more question for my understanding: Are the three types of ck8xx
> CPUs mutually incompatible in user space as well, or are the differences
> only for the kernel? For the ARM example, ARMv5 and ARMv7
> fundamentally require separate kernels, but both can run user space
> programs built for ARMv5.
-mcpu=ck807 app could run on ck807, ck810, ck860.
-mcpu=ck810 app could run on ck807, ck810, ck860.
-mcpu=ck860 app only run on ck860.
They are all incompatible at the kernel level.
Best Regards
Guo Ren
next prev parent reply other threads:[~2018-03-28 8:04 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-18 19:51 [PATCH 00/19] C-SKY(csky) Linux Kernel Port Guo Ren
2018-03-18 19:51 ` [PATCH 01/19] csky: Kernel booting Guo Ren
2018-03-18 19:51 ` [PATCH 02/19] csky: Exception handling and syscall Guo Ren
2018-03-19 1:48 ` Mark Rutland
2018-03-19 6:47 ` Guo Ren
2018-03-19 8:50 ` Dominik Brodowski
2018-03-19 11:03 ` Guo Ren
2018-03-18 19:51 ` [PATCH 03/19] csky: Cache and TLB routines Guo Ren
2018-03-18 19:51 ` [PATCH 04/19] csky: MMU and page talbe management Guo Ren
2018-03-18 19:51 ` [PATCH 05/19] csky: Process management Guo Ren
2018-03-18 19:51 ` [PATCH 06/19] csky: IRQ handling Guo Ren
2018-03-19 13:16 ` Thomas Gleixner
2018-03-20 2:06 ` Guo Ren
2018-03-18 19:51 ` [PATCH 07/19] csky: Atomic operations Guo Ren
2018-03-18 19:51 ` [PATCH 08/19] csky: ELF and module probe Guo Ren
2018-03-18 19:51 ` [PATCH 09/19] csky: VDSO and rt_sigreturn Guo Ren
2018-03-18 19:51 ` [PATCH 10/19] csky: Signal handling Guo Ren
2018-03-26 13:04 ` Arnd Bergmann
2018-03-27 2:41 ` Guo Ren
2018-03-18 19:51 ` [PATCH 11/19] csky: Library functions Guo Ren
2018-03-18 19:51 ` [PATCH 12/19] csky: Debug and Ptrace GDB Guo Ren
2018-03-26 13:06 ` Arnd Bergmann
2018-03-18 19:51 ` [PATCH 13/19] csky: User access Guo Ren
2018-03-18 19:51 ` [PATCH 14/19] csky: Misc headers Guo Ren
2018-03-19 16:11 ` Arnd Bergmann
2018-03-20 3:36 ` Guo Ren
2018-03-20 7:54 ` Arnd Bergmann
2018-03-20 13:22 ` Guo Ren
2018-03-18 19:51 ` [PATCH 15/19] csky: Build infrastructure Guo Ren
2018-03-19 15:45 ` Arnd Bergmann
2018-03-20 13:13 ` Guo Ren
2018-03-21 7:36 ` Arnd Bergmann
2018-03-21 12:41 ` Guo Ren
2018-03-26 13:00 ` Arnd Bergmann
2018-03-27 2:39 ` Guo Ren
2018-03-27 7:38 ` Arnd Bergmann
2018-03-28 3:49 ` Guo Ren
2018-03-28 7:40 ` Arnd Bergmann
2018-03-28 8:04 ` Guo Ren [this message]
2018-03-18 19:51 ` [PATCH 16/19] csky: Device tree Guo Ren
2018-03-19 15:28 ` Arnd Bergmann
2018-03-20 13:55 ` Guo Ren
2018-03-18 19:51 ` [PATCH 17/19] csky: defconfig Guo Ren
2018-03-26 13:16 ` Arnd Bergmann
2018-03-27 2:21 ` Guo Ren
2018-03-27 7:48 ` Arnd Bergmann
2018-03-28 3:59 ` Guo Ren
2018-03-18 19:51 ` [PATCH 18/19] clocksource: add timer-nationalchip.c Guo Ren
2018-03-18 22:07 ` Daniel Lezcano
2018-03-19 6:59 ` Guo Ren
2018-03-19 4:15 ` Mark Rutland
2018-03-19 7:03 ` Guo Ren
2018-03-18 19:51 ` [PATCH 19/19] irqchip: add irq-nationalchip.c and irq-csky.c Guo Ren
2018-03-19 4:26 ` Mark Rutland
2018-03-19 7:08 ` Guo Ren
2018-03-19 13:30 ` Thomas Gleixner
2018-03-20 14:23 ` Guo Ren
2018-03-18 20:25 ` [PATCH 00/19] C-SKY(csky) Linux Kernel Port Joe Perches
2018-03-19 7:11 ` Guo Ren
2018-03-26 13:30 ` Arnd Bergmann
2018-03-26 15:06 ` [gnu-csky] " Sandra Loosemore
2018-03-26 15:06 ` Sandra Loosemore
2018-03-26 15:11 ` Arnd Bergmann
2018-03-27 1:58 ` Guo Ren
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