openwrt/target/linux/generic/pending-5.4/103-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch
Jason A. Donenfeld 2a27f6f90a kernel: backport pending fix to select CPU_MIPS64
The CPU_MIPS64 and CPU_MIPS32 variables are supposed to be able to
distinguish broadly between 64-bit and 32-bit MIPS CPUs. However, they
weren't selected by the specialty CPUs, Octeon and Loongson, which meant
it was possible to hit a weird state of:

   MIPS=y, CONFIG_64BIT=y, CPU_MIPS64=n

This commit rectifies the issue by having CPU_MIPS64 be selected when
the missing Octeon or Loongson models are selected.

In particular, this affects our octeonplus target.

It has been posted to LKML here:
https://lore.kernel.org/linux-mips/20210227122605.2680138-1-Jason@zx2c4.com/

Cc: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: David Bauer <mail@david-bauer.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2021-02-27 19:14:27 +01:00

38 lines
1.3 KiB
Diff

From 31ca877744d95713e4925de542e1c686ab08a542 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sat, 27 Feb 2021 13:20:24 +0100
Subject: [PATCH] MIPS: select CPU_MIPS64 for remaining MIPS64 CPUs
The CPU_MIPS64 and CPU_MIPS32 variables are supposed to be able to
distinguish broadly between 64-bit and 32-bit MIPS CPUs. However, they
weren't selected by the specialty CPUs, Octeon and Loongson, which meant
it was possible to hit a weird state of:
MIPS=y, CONFIG_64BIT=y, CPU_MIPS64=n
This commit rectifies the issue by having CPU_MIPS64 be selected when
the missing Octeon or Loongson models are selected.
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: George Cherian <gcherian@marvell.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
arch/mips/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2036,7 +2036,8 @@ config CPU_MIPS32
config CPU_MIPS64
bool
- default y if CPU_MIPS64_R1 || CPU_MIPS64_R2 || CPU_MIPS64_R6
+ default y if CPU_MIPS64_R1 || CPU_MIPS64_R2 || CPU_MIPS64_R6 || \
+ CPU_LOONGSON64 || CPU_CAVIUM_OCTEON
#
# These indicate the revision of the architecture