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| author | Vineet Gupta | 2018-06-06 19:20:37 +0200 |
|---|---|---|
| committer | Vineet Gupta | 2019-02-21 20:03:18 +0100 |
| commit | e494239a007e601448110ac304fe055951f9de3b (patch) | |
| tree | 2814f3f12bddf8a5cda6c50ff5523a5066a03cb9 /arch/arc/Kconfig | |
| parent | ARC: uacces: remove lp_start, lp_end from clobber list (diff) | |
| download | kernel-qcow2-linux-e494239a007e601448110ac304fe055951f9de3b.tar.gz kernel-qcow2-linux-e494239a007e601448110ac304fe055951f9de3b.tar.xz kernel-qcow2-linux-e494239a007e601448110ac304fe055951f9de3b.zip | |
ARCv2: support manual regfile save on interrupts
There's a hardware bug which affects the HSDK platform, triggered by
micro-ops for auto-saving regfile on taken interrupt. The workaround is
to inhibit autosave.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 376366a7db81..7215f52b3413 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -407,6 +407,14 @@ config ARC_HAS_ACCL_REGS (also referred to as r58:r59). These can also be used by gcc as GPR so kernel needs to save/restore per process +config ARC_IRQ_NO_AUTOSAVE + bool "Disable hardware autosave regfile on interrupts" + default n + help + On HS cores, taken interrupt auto saves the regfile on stack. + This is programmable and can be optionally disabled in which case + software INTERRUPT_PROLOGUE/EPILGUE do the needed work + endif # ISA_ARCV2 endmenu # "ARC CPU Configuration" |