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| author | Ard Biesheuvel <ardb@kernel.org> | 2022-12-13 16:24:07 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-12-14 18:32:46 +0300 |
| commit | 38792972de4294163f44d6360fd221e6f2c22a05 (patch) | |
| tree | 9ab709d94011309a88f4f143c996c38a67dcb923 /arch/Kconfig | |
| parent | 5f4c374760b031f06c69c2fdad1b0e981a1ad42f (diff) | |
| download | linux-38792972de4294163f44d6360fd221e6f2c22a05.tar.xz | |
ftrace: Allow WITH_ARGS flavour of graph tracer with shadow call stack
The recent switch on arm64 from DYNAMIC_FTRACE_WITH_REGS to
DYNAMIC_FTRACE_WITH_ARGS failed to take into account that we currently
require the former in order to allow the function graph tracer to be
enabled in combination with shadow call stacks. This means that this is
no longer permitted at all, in spite of the fact that either flavour of
ftrace works perfectly fine in this combination.
So permit WITH_ARGS as well as WITH_REGS.
Fixes: ddc9863e9e90 ("scs: Disable when function graph tracing is enabled")
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20221213132407.1485025-1-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 072a1b39e3af..c93c004fcf7a 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -635,7 +635,7 @@ config ARCH_SUPPORTS_SHADOW_CALL_STACK config SHADOW_CALL_STACK bool "Shadow Call Stack" depends on ARCH_SUPPORTS_SHADOW_CALL_STACK - depends on DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER + depends on DYNAMIC_FTRACE_WITH_ARGS || DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER help This option enables the compiler's Shadow Call Stack, which uses a shadow stack to protect function return addresses from |