linux-kernel - RE: [PATCH v10] lib: checksum: Use aligned accesses for ip_fast_csum and csum_ipv6

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Date: Tue, 27 Feb 2024 22:44:10 +0000
From: David Laight <David.Laight@...LAB.COM>
To: 'Guenter Roeck' <linux@...ck-us.net>, Charlie Jenkins
	<charlie@...osinc.com>, Christophe Leroy <christophe.leroy@...roup.eu>
CC: "Russell King (Oracle)" <linux@...linux.org.uk>, Palmer Dabbelt
	<palmer@...belt.com>, Andrew Morton <akpm@...ux-foundation.org>, Helge Deller
	<deller@....de>, "James E.J. Bottomley"
	<James.Bottomley@...senpartnership.com>, Parisc List
	<linux-parisc@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Palmer Dabbelt
	<palmer@...osinc.com>, Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v10] lib: checksum: Use aligned accesses for ip_fast_csum
 and csum_ipv6_magic tests

..
> This is the "known" list of failures. I don't currently run kunit tests
> on nios2 or riscv32, for example, nor on any architectures with no qemu
> support.

nios2 is definitely going to 'crash and burn' if you do a misaligned access.

Although Intel (aka the Altera bit) are claiming current version
of their Quartus fpga build software is the last one the will
support the nios2.
They are expecting everyone to move to a risc-v soft cpu instead.
We aren't happy about that, I doubt some of the big telco's are
either - I believe some mobile base stations have fpga with a
lot of nios2 in them - almost certainly running with a few kB
of code and data memory and running small control tasks.
If you want to run Linux, find an fpga with an ARM core.

There are some solutions - like writing a compatible soft cpu.

	David

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