perf c2c: Fix 'perf c2c record -e list' to show the default events used

[linux-2.6-microblaze.git] / arch / Kconfig

diff --git a/arch/Kconfig b/arch/Kconfig
index 17fe351..786a85d 100644 (file)
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -248,11 +248,18 @@ config ARCH_HAS_SET_DIRECT_MAP
        bool
 
 #
-# Select if arch has an uncached kernel segment and provides the
-# uncached_kernel_address / cached_kernel_address symbols to use it
+# Select if the architecture provides the arch_dma_set_uncached symbol to
+# either provide an uncached segement alias for a DMA allocation, or
+# to remap the page tables in place.
 #
-config ARCH_HAS_UNCACHED_SEGMENT
-       select ARCH_HAS_DMA_PREP_COHERENT
+config ARCH_HAS_DMA_SET_UNCACHED
+       bool
+
+#
+# Select if the architectures provides the arch_dma_clear_uncached symbol
+# to undo an in-place page table remap for uncached access.
+#
+config ARCH_HAS_DMA_CLEAR_UNCACHED
        bool
 
 # Select if arch init_task must go in the __init_task_data section
@@ -540,11 +547,17 @@ config HAVE_CONTEXT_TRACKING
        help
          Provide kernel/user boundaries probes necessary for subsystems
          that need it, such as userspace RCU extended quiescent state.
-         Syscalls need to be wrapped inside user_exit()-user_enter() through
-         the slow path using TIF_NOHZ flag. Exceptions handlers must be
-         wrapped as well. Irqs are already protected inside
-         rcu_irq_enter/rcu_irq_exit() but preemption or signal handling on
-         irq exit still need to be protected.
+         Syscalls need to be wrapped inside user_exit()-user_enter(), either
+         optimized behind static key or through the slow path using TIF_NOHZ
+         flag. Exceptions handlers must be wrapped as well. Irqs are already
+         protected inside rcu_irq_enter/rcu_irq_exit() but preemption or signal
+         handling on irq exit still need to be protected.
+
+config HAVE_TIF_NOHZ
+       bool
+       help
+         Arch relies on TIF_NOHZ and syscall slow path to implement context
+         tracking calls to user_enter()/user_exit().
 
 config HAVE_VIRT_CPU_ACCOUNTING
        bool