Dave Martin <[email protected]> writes: > This patch adds CONFIG_ARM64_SVE to control building of SVE support > into the kernel, and adds a stub predicate system_supports_sve() to > control conditional compilation and runtime SVE support. > > system_supports_sve() just returns false for now: it will be > replaced with a non-trivial implementation in a later patch, once > SVE support is complete enough to be enabled safely. > > Signed-off-by: Dave Martin <[email protected]>
Reviewed-by: Alex Bennée <[email protected]> > --- > arch/arm64/Kconfig | 11 +++++++++++ > arch/arm64/include/asm/cpufeature.h | 5 +++++ > 2 files changed, 16 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index fdc302e..fbf7a5c 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -962,6 +962,17 @@ config ARM64_UAO > > endmenu > > +config ARM64_SVE > + bool "ARM Scalable Vector Extension support" > + default y > + help > + The Scalable Vector Extension (SVE) is an extension to the AArch64 > + execution state which complements and extends the SIMD functionality > + of the base architecture to support much larger vectors and to enable > + additional vectorisation opportunities. > + > + To enable use of this extension on CPUs that implement it, say Y. > + > config ARM64_MODULE_CMODEL_LARGE > bool > > diff --git a/arch/arm64/include/asm/cpufeature.h > b/arch/arm64/include/asm/cpufeature.h > index 428ee1f..4ea3441 100644 > --- a/arch/arm64/include/asm/cpufeature.h > +++ b/arch/arm64/include/asm/cpufeature.h > @@ -262,6 +262,11 @@ static inline bool system_uses_ttbr0_pan(void) > !cpus_have_const_cap(ARM64_HAS_PAN); > } > > +static inline bool system_supports_sve(void) > +{ > + return false; > +} > + > #endif /* __ASSEMBLY__ */ > > #endif -- Alex Bennée _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
