On Tue, 11 Mar 2025 04:03:21 +0000, Zhenyu Ye <yezhenyu2@xxxxxxxxxx> wrote: > > From: eillon <yezhenyu2@xxxxxxxxxx> > > The HDBSS feature introduces new assembly registers > (HDBSSBR_EL2 and HDBSSPROD_EL2), which depends on the armv9.5-a > compilation support. So add ARM64_HDBSS config to control whether > enable the HDBSS feature. > > Signed-off-by: eillon <yezhenyu2@xxxxxxxxxx> > --- > arch/arm64/Kconfig | 19 +++++++++++++++++++ > arch/arm64/Makefile | 4 +++- > arch/arm64/include/asm/cpufeature.h | 3 +++ > 3 files changed, 25 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 940343beb3d4..3458261eb14b 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -2237,6 +2237,25 @@ config ARM64_GCS > > endmenu # "v9.4 architectural features" > > +menu "ARMv9.5 architectural features" > + > +config ARM64_HDBSS > + bool "Enable support for Hardware Dirty state tracking Structure (HDBSS)" > + default y > + depends on AS_HAS_ARMV9_5 > + help > + Hardware Dirty state tracking Structure(HDBSS) enhances tracking > + translation table descriptors’ dirty state to reduce the cost of > + surveying for dirtied granules. > + > + The feature introduces new assembly registers (HDBSSBR_EL2 and > + HDBSSPROD_EL2), which depends on AS_HAS_ARMV9_5. Why? You seem to be using the generated accessors everywhere, and I can't see a need for this compiler dependency. M. -- Without deviation from the norm, progress is not possible.
