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MIPS: Prevent building MT support for microMIPS kernels 

We don't currently support the MT ASE for microMIPS kernels, and there
are no CPUs currently in existence that use both. They can however both
be enabled in Kconfig, resulting in build failures such as:

  AS      arch/mips/kernel/cps-vec.o
arch/mips/kernel/cps-vec.S: Assembler messages:
arch/mips/kernel/cps-vec.S:242: Warning: the 32-bit microMIPS architecture does not support the `mt' extension
arch/mips/kernel/cps-vec.S:276: Error: unrecognized opcode `mttc0 $13,$2,2'
arch/mips/kernel/cps-vec.S:282: Error: unrecognized opcode `mttc0 $8,$1,2'
arch/mips/kernel/cps-vec.S:285: Error: unrecognized opcode `mttc0 $0,$2,1'
...

Fix this by preventing MT from being enabled when targeting microMIPS.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16951/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2017-08-07 16:18:04 -07:00 committed by Ralf Baechle
parent 735302665c
commit 527f10285b
1 changed files with 1 additions and 1 deletions
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2
arch/mips/Kconfig
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@ -2260,7 +2260,7 @@ config CPU_R4K_CACHE_TLB
config MIPS_MT_SMP config MIPS_MT_SMP
bool "MIPS MT SMP support (1 TC on each available VPE)" bool "MIPS MT SMP support (1 TC on each available VPE)"
depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MIPSR6 depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MIPSR6 && !CPU_MICROMIPS
select CPU_MIPSR2_IRQ_VI select CPU_MIPSR2_IRQ_VI
select CPU_MIPSR2_IRQ_EI select CPU_MIPSR2_IRQ_EI
select SYNC_R4K select SYNC_R4K