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authorLinus Torvalds <torvalds@linux-foundation.org>2020-01-31 11:26:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-31 11:26:11 -0800
commitb7e573bb4a7a511741f8942b1fb03cfe602ee57f (patch)
treeeba521c86b1e430bae7e2cdd88874198437017b9 /arch/arc/Kconfig
parenta1084542a8e83b8eb5aaf7e8ccb81b461e7d4ce8 (diff)
parentf45ba2bd6da0dc8000aa7ea7a3858fb51608f766 (diff)
Merge tag 'arc-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta: - Wire up clone3 syscall - ARCv2 FPU state save/restore across context switch - AXS10x platform and misc fixes * tag 'arc-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARCv2: fpu: preserve userspace fpu state ARC: fpu: declutter code, move bits out into fpu.h ARC: wireup clone3 syscall ARC: [plat-axs10x]: Add missing multicast filter number to GMAC node ARC: update feature support for jump-labels
Diffstat (limited to 'arch/arc/Kconfig')
-rw-r--r--arch/arc/Kconfig16
1 files changed, 6 insertions, 10 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 5f448201955b..ff2a393b635c 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -28,6 +28,7 @@ config ARC
select GENERIC_SMP_IDLE_THREAD
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
+ select HAVE_COPY_THREAD_TLS
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DEBUG_KMEMLEAK
select HAVE_FUTEX_CMPXCHG if FUTEX
@@ -350,9 +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
@@ -360,14 +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