diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2018-06-06 10:20:37 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-02-21 11:03:18 -0800 |
| commit | e494239a007e601448110ac304fe055951f9de3b (patch) | |
| tree | 2814f3f12bddf8a5cda6c50ff5523a5066a03cb9 /arch/arc/Kconfig | |
| parent | d5e3c55e01d8b1774b37b4647c30fb22f1d39077 (diff) | |
| download | linux-e494239a007e601448110ac304fe055951f9de3b.tar.bz2 | |
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" |