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MIPS: Make DIEI support as a config option

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DI(Disable Interrupt) and EI(Enable Interrupt) instructions is required by
MIPSR2/MIPSR6, however, it appears to be buggy on some processors such as
Loongson-3A1000. Thus we make it as a config option to allow disable it at
compile time with CPU_MIPSR2 selected.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: chenhc@lemote.com
Cc: paul.burton@mips.com
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
Jiaxun Yang
2020-01-13 18:14:59 +08:00
committed by Paul Burton
parent 636e9d23dd
commit ba9196d2e0
3 changed files with 14 additions and 5 deletions
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4
arch/mips/lib/mips-atomic.c
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@@ -15,7 +15,7 @@
#include <linux/export.h>
#include <linux/stringify.h>
#if !defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_CPU_MIPSR6)
#if !defined(CONFIG_CPU_HAS_DIEI)
/*
* For cli() we have to insert nops to make sure that the new value
@@ -110,4 +110,4 @@ notrace void arch_local_irq_restore(unsigned long flags)
}
EXPORT_SYMBOL(arch_local_irq_restore);
#endif /* !CONFIG_CPU_MIPSR2 && !CONFIG_CPU_MIPSR6 */
#endif /* !CONFIG_CPU_HAS_DIEI */