diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2020-01-17 15:04:03 -0800 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2020-01-17 16:53:44 -0800 |
| commit | f45ba2bd6da0dc8000aa7ea7a3858fb51608f766 (patch) | |
| tree | 3be8113cb45459531bc5ffee5bbbb1de38d5d234 /arch/arc/Kconfig | |
| parent | f05523aa7a1e63bfada5e222c0a57e02dbd4fcfa (diff) | |
ARCv2: fpu: preserve userspace fpu state
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index c4409eab07a9..fd351001d8b9 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -351,9 +351,8 @@ config NODES_SHIFT Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory zones. -if ISA_ARCOMPACT - config ARC_COMPACT_IRQ_LEVELS + depends on ISA_ARCOMPACT bool "Setup Timer IRQ as high Priority" # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy depends on !SMP @@ -361,14 +360,10 @@ config ARC_COMPACT_IRQ_LEVELS config ARC_FPU_SAVE_RESTORE bool "Enable FPU state persistence across context switch" help - Double Precision Floating Point unit had dedicated regs which - need to be saved/restored across context-switch. - Note that ARC FPU is overly simplistic, unlike say x86, which has - hardware pieces to allow software to conditionally save/restore, - based on actual usage of FPU by a task. Thus our implemn does - this for all tasks in system. - -endif #ISA_ARCOMPACT + ARCompact FPU has internal registers to assist with Double precision + Floating Point operations. There are control and stauts registers + for floating point exceptions and rounding modes. These are + preserved across task context switch when enabled. config ARC_CANT_LLSC def_bool n |