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Subject[PATCH 20/23] tracehook: CONFIG_HAVE_ARCH_TRACEHOOK
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This adds the generic HAVE_ARCH_TRACEHOOK kconfig item.
Each arch should add to some Kconfig file:
select HAVE_ARCH_TRACEHOOK
if the arch code uses all the latest hooks to enable newfangled
tracing and debugging code. The comment in arch/Kconfig lists
all the prerequisite arch support. When all these are available,
setting HAVE_ARCH_TRACEHOOK will allow enabling any new features
that depend on the modern arch interfaces.

Signed-off-by: Roland McGrath <roland@redhat.com>
---
arch/Kconfig | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index ad89a33..4641edf 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -37,6 +37,24 @@ config HAVE_KPROBES
config HAVE_KRETPROBES
def_bool n

+#
+# An arch should select this if it provides all these things:
+#
+# task_pt_regs() in asm/processor.h or asm/ptrace.h
+# arch_has_single_step() if there is hardware single-step support
+# arch_has_block_step() if there is hardware block-step support
+# arch_ptrace() and not #define __ARCH_SYS_PTRACE
+# compat_arch_ptrace() and #define __ARCH_WANT_COMPAT_SYS_PTRACE
+# asm/syscall.h supplying asm-generic/syscall.h interface
+# linux/regset.h user_regset interfaces
+# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
+# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
+# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
+# signal delivery calls tracehook_signal_handler()
+#
+config HAVE_ARCH_TRACEHOOK
+ def_bool n
+
config HAVE_DMA_ATTRS
def_bool n


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