https://github.com/torvalds/linux
Revision b6143d10d23ebb4a77af311e8b8b7f019d0163e6 authored by Will Deacon on 16 August 2019, 13:57:43 UTC, committed by Catalin Marinas on 16 August 2019, 16:40:03 UTC
The initial support for dynamic ftrace trampolines in modules made use
of an indirect branch which loaded its target from the beginning of
a special section (e71a4e1bebaf7 ("arm64: ftrace: add support for far
branches to dynamic ftrace")). Since no instructions were being patched,
no cache maintenance was needed. However, later in be0f272bfc83 ("arm64:
ftrace: emit ftrace-mod.o contents through code") this code was reworked
to output the trampoline instructions directly into the PLT entry but,
unfortunately, the necessary cache maintenance was overlooked.
Add a call to __flush_icache_range() after writing the new trampoline
instructions but before patching in the branch to the trampoline.
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: James Morse <james.morse@arm.com>
Cc: <stable@vger.kernel.org>
Fixes: be0f272bfc83 ("arm64: ftrace: emit ftrace-mod.o contents through code")
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
1 parent 5717fe5
Tip revision: b6143d10d23ebb4a77af311e8b8b7f019d0163e6 authored by Will Deacon on 16 August 2019, 13:57:43 UTC
arm64: ftrace: Ensure module ftrace trampoline is coherent with I-side
arm64: ftrace: Ensure module ftrace trampoline is coherent with I-side
Tip revision: b6143d1
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| .clang-format | -rw-r--r-- | 14.6 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.7 KB |
| .mailmap | -rw-r--r-- | 12.2 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 97.1 KB |
| Kbuild | -rw-r--r-- | 1.5 KB |
| Kconfig | -rw-r--r-- | 595 bytes |
| MAINTAINERS | -rw-r--r-- | 510.2 KB |
| Makefile | -rw-r--r-- | 59.2 KB |
| README | -rw-r--r-- | 727 bytes |
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