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feat(cpufeat): deny AArch64-only features when building for AArch32

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Many newer architecture features are defined for AArch64 only, so cannot
be used in an AArch32 build.

To avoid #ifdef-ing every single user, just provide trivial
implementations of the feature check functions is_feat_xxx_supported(),
which always return "false" in AArch32. The compiler will then optimise
out the dependent code automatically.

Change-Id: I1e7d653fca0e676a11858efd953c2d623f2d5c9e
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Andre Przywara 2023-05-23 10:34:38 +01:00
parent d156c5220a
commit 733d112f05
1 changed files with 34 additions and 6 deletions
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40
include/arch/aarch32/arch_features.h
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@ -110,12 +110,6 @@ static inline bool is_feat_dit_supported(void)
return read_feat_dit_id_field() != 0U;
}
static inline bool is_feat_spe_supported(void)
{
/* FEAT_SPE is AArch64 only */
return false;
}
static inline unsigned int read_feat_pan_id_field(void)
{
return ISOLATE_FIELD(read_id_mmfr3(), ID_MMFR3_PAN);
@ -134,4 +128,38 @@ static inline bool is_feat_pan_supported(void)
return read_feat_pan_id_field() != 0U;
}
/*
* TWED, ECV, CSV2, RAS are only used by the AArch64 EL2 context switch
* code. In fact, EL2 context switching is only needed for AArch64 (since
* there is no secure AArch32 EL2), so just disable these features here.
*/
static inline bool is_feat_twed_supported(void) { return false; }
static inline bool is_feat_ecv_supported(void) { return false; }
static inline bool is_feat_ecv_v2_supported(void) { return false; }
static inline bool is_feat_csv2_2_supported(void) { return false; }
static inline bool is_feat_ras_supported(void) { return false; }
/* The following features are supported in AArch64 only. */
static inline bool is_feat_vhe_supported(void) { return false; }
static inline bool is_feat_sel2_supported(void) { return false; }
static inline bool is_feat_fgt_supported(void) { return false; }
static inline bool is_feat_tcr2_supported(void) { return false; }
static inline bool is_feat_spe_supported(void) { return false; }
static inline bool is_feat_rng_supported(void) { return false; }
static inline bool is_feat_gcs_supported(void) { return false; }
static inline bool is_feat_mpam_supported(void) { return false; }
static inline bool is_feat_hcx_supported(void) { return false; }
static inline bool is_feat_sve_supported(void) { return false; }
static inline bool is_feat_brbe_supported(void) { return false; }
static inline bool is_feat_trbe_supported(void) { return false; }
static inline bool is_feat_nv2_supported(void) { return false; }
static inline bool is_feat_sme_supported(void) { return false; }
static inline bool is_feat_sme2_supported(void) { return false; }
static inline bool is_feat_s2poe_supported(void) { return false; }
static inline bool is_feat_s1poe_supported(void) { return false; }
static inline bool is_feat_sxpoe_supported(void) { return false; }
static inline bool is_feat_s2pie_supported(void) { return false; }
static inline bool is_feat_s1pie_supported(void) { return false; }
static inline bool is_feat_sxpie_supported(void) { return false; }
#endif /* ARCH_FEATURES_H */