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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-12-20 19:38:12 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-02-07 13:03:10 +0300 |
| commit | a4520b25276500f1abcfc55d24f1251b7b08eff6 (patch) | |
| tree | 5301d30fe547434d5ec5e7eb5559c866722a3fa5 /arch/powerpc/Kconfig | |
| parent | 0c850965d6909d39fd69d6a3602bb62b48cad417 (diff) | |
| download | linux-a4520b25276500f1abcfc55d24f1251b7b08eff6.tar.xz | |
powerpc/ftrace: Add support for livepatch to PPC32
PPC64 needs some special logic to properly set up the TOC.
See commit 85baa095497f ("powerpc/livepatch: Add live patching support
on ppc64le") for details.
PPC32 doesn't have TOC so it doesn't need that logic, so adding
LIVEPATCH support is straight forward.
Add CONFIG_LIVEPATCH_64 and move livepatch stack logic into that item.
Livepatch sample modules all work.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/63cb094125b6a6038c65eeac2abaabbabe63addd.1640017960.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index b779603978e1..1d027ce94ab1 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -9,6 +9,10 @@ config 64BIT bool default y if PPC64 +config LIVEPATCH_64 + def_bool PPC64 + depends on LIVEPATCH + config MMU bool default y @@ -221,7 +225,7 @@ config PPC select HAVE_KPROBES_ON_FTRACE select HAVE_KRETPROBES select HAVE_LD_DEAD_CODE_DATA_ELIMINATION - select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS && PPC64 + select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_MOD_ARCH_SPECIFIC select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) select HAVE_OPTPROBES |