| Message ID | 20201201161632.1234753-2-dja@axtens.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KASAN for powerpc64 radix | expand |
Le 01/12/2020 à 17:16, Daniel Axtens a écrit : > For annoying architectural reasons, it's very difficult to support inline > instrumentation on powerpc64. > > Add a Kconfig flag to allow an arch to disable inline. (It's a bit > annoying to be 'backwards', but I'm not aware of any way to have > an arch force a symbol to be 'n', rather than 'y'.) > > Signed-off-by: Daniel Axtens <dja@axtens.net> > --- > lib/Kconfig.kasan | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index 542a9c18398e..31a0b28f6c2b 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -9,6 +9,9 @@ config HAVE_ARCH_KASAN_SW_TAGS > config HAVE_ARCH_KASAN_VMALLOC > bool > > +config HAVE_ARCH_NO_KASAN_INLINE Maybe a better name could be: ARCH_DISABLE_KASAN_INLINE > + def_bool n > + > config CC_HAS_KASAN_GENERIC > def_bool $(cc-option, -fsanitize=kernel-address) > > @@ -108,6 +111,7 @@ config KASAN_OUTLINE > > config KASAN_INLINE > bool "Inline instrumentation" > + depends on !HAVE_ARCH_NO_KASAN_INLINE > help > Compiler directly inserts code checking shadow memory before > memory accesses. This is faster than outline (in some workloads >
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index 542a9c18398e..31a0b28f6c2b 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -9,6 +9,9 @@ config HAVE_ARCH_KASAN_SW_TAGS config HAVE_ARCH_KASAN_VMALLOC bool +config HAVE_ARCH_NO_KASAN_INLINE + def_bool n + config CC_HAS_KASAN_GENERIC def_bool $(cc-option, -fsanitize=kernel-address) @@ -108,6 +111,7 @@ config KASAN_OUTLINE config KASAN_INLINE bool "Inline instrumentation" + depends on !HAVE_ARCH_NO_KASAN_INLINE help Compiler directly inserts code checking shadow memory before memory accesses. This is faster than outline (in some workloads
For annoying architectural reasons, it's very difficult to support inline instrumentation on powerpc64. Add a Kconfig flag to allow an arch to disable inline. (It's a bit annoying to be 'backwards', but I'm not aware of any way to have an arch force a symbol to be 'n', rather than 'y'.) Signed-off-by: Daniel Axtens <dja@axtens.net> --- lib/Kconfig.kasan | 4 ++++ 1 file changed, 4 insertions(+)