arch/arm64/elf_hwcaps.rst

19 Userspace software can test for features by acquiring the AT_HWCAP or
32 Where software relies on a feature described by a hwcap, it should check
46 which are described by architected ID registers inaccessible to
53     Functionality implied by idreg.field == val.
58 indicate the absence of functionality implied by other values of
62 described by ID registers alone. These may be described without
70     Functionality implied by ID_AA64PFR0_EL1.FP == 0b0000.
73     Functionality implied by ID_AA64PFR0_EL1.AdvSIMD == 0b0000.
80     Functionality implied by ID_AA64ISAR0_EL1.AES == 0b0001.
83     Functionality implied by ID_AA64ISAR0_EL1.AES == 0b0010.
86     Functionality implied by ID_AA64ISAR0_EL1.SHA1 == 0b0001.
89     Functionality implied by ID_AA64ISAR0_EL1.SHA2 == 0b0001.
92     Functionality implied by ID_AA64ISAR0_EL1.CRC32 == 0b0001.
95     Functionality implied by ID_AA64ISAR0_EL1.Atomic == 0b0010.
98     Functionality implied by ID_AA64PFR0_EL1.FP == 0b0001.
101     Functionality implied by ID_AA64PFR0_EL1.AdvSIMD == 0b0001.
105     described by Documentation/arch/arm64/cpu-feature-registers.rst.
110     Functionality implied by ID_AA64ISAR0_EL1.RDM == 0b0001.
113     Functionality implied by ID_AA64ISAR1_EL1.JSCVT == 0b0001.
116     Functionality implied by ID_AA64ISAR1_EL1.FCMA == 0b0001.
119     Functionality implied by ID_AA64ISAR1_EL1.LRCPC == 0b0001.
122     Functionality implied by ID_AA64ISAR1_EL1.DPB == 0b0001.
125     Functionality implied by ID_AA64ISAR0_EL1.SHA3 == 0b0001.
128     Functionality implied by ID_AA64ISAR0_EL1.SM3 == 0b0001.
131     Functionality implied by ID_AA64ISAR0_EL1.SM4 == 0b0001.
134     Functionality implied by ID_AA64ISAR0_EL1.DP == 0b0001.
137     Functionality implied by ID_AA64ISAR0_EL1.SHA2 == 0b0010.
140     Functionality implied by ID_AA64PFR0_EL1.SVE == 0b0001.
143    Functionality implied by ID_AA64ISAR0_EL1.FHM == 0b0001.
146     Functionality implied by ID_AA64PFR0_EL1.DIT == 0b0001.
149     Functionality implied by ID_AA64MMFR2_EL1.AT == 0b0001.
152     Functionality implied by ID_AA64ISAR1_EL1.LRCPC == 0b0010.
155     Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001.
158     Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.
161     Functionality implied by ID_AA64ISAR1_EL1.SB == 0b0001.
164     Functionality implied by ID_AA64ISAR1_EL1.APA == 0b0001 or
165     ID_AA64ISAR1_EL1.API == 0b0001, as described by
169     Functionality implied by ID_AA64ISAR1_EL1.GPA == 0b0001 or
170     ID_AA64ISAR1_EL1.GPI == 0b0001, as described by
174     Functionality implied by ID_AA64ISAR1_EL1.DPB == 0b0010.
177     Functionality implied by ID_AA64ZFR0_EL1.SVEver == 0b0001.
180     Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0001.
183     Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0010.
186     Functionality implied by ID_AA64ZFR0_EL1.BitPerm == 0b0001.
189     Functionality implied by ID_AA64ZFR0_EL1.SHA3 == 0b0001.
192     Functionality implied by ID_AA64ZFR0_EL1.SM4 == 0b0001.
195     Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0010.
198     Functionality implied by ID_AA64ISAR1_EL1.FRINTTS == 0b0001.
201     Functionality implied by ID_AA64ZFR0_EL1.I8MM == 0b0001.
204     Functionality implied by ID_AA64ZFR0_EL1.F32MM == 0b0001.
207     Functionality implied by ID_AA64ZFR0_EL1.F64MM == 0b0001.
210     Functionality implied by ID_AA64ZFR0_EL1.BF16 == 0b0001.
213     Functionality implied by ID_AA64ISAR1_EL1.I8MM == 0b0001.
216     Functionality implied by ID_AA64ISAR1_EL1.BF16 == 0b0001.
219     Functionality implied by ID_AA64ISAR1_EL1.DGH == 0b0001.
222     Functionality implied by ID_AA64ISAR0_EL1.RNDR == 0b0001.
225     Functionality implied by ID_AA64PFR1_EL1.BT == 0b0001.
228     Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0010, as described
229     by Documentation/arch/arm64/memory-tagging-extension.rst.
232     Functionality implied by ID_AA64MMFR0_EL1.ECV == 0b0001.
235     Functionality implied by ID_AA64MMFR1_EL1.AFP == 0b0001.
238     Functionality implied by ID_AA64ISAR2_EL1.RPRES == 0b0001.
241     Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0011, as described
242     by Documentation/arch/arm64/memory-tagging-extension.rst.
245     Functionality implied by ID_AA64PFR1_EL1.SME == 0b0001, as described
246     by Documentation/arch/arm64/sme.rst.
249     Functionality implied by ID_AA64SMFR0_EL1.I16I64 == 0b1111.
252     Functionality implied by ID_AA64SMFR0_EL1.F64F64 == 0b1.
255     Functionality implied by ID_AA64SMFR0_EL1.I8I32 == 0b1111.
258     Functionality implied by ID_AA64SMFR0_EL1.F16F32 == 0b1.
261     Functionality implied by ID_AA64SMFR0_EL1.B16F32 == 0b1.
264     Functionality implied by ID_AA64SMFR0_EL1.F32F32 == 0b1.
267     Functionality implied by ID_AA64SMFR0_EL1.FA64 == 0b1.
270     Functionality implied by ID_AA64ISAR2_EL1.WFXT == 0b0010.
273     Functionality implied by ID_AA64ISAR1_EL1.BF16 == 0b0010.
276     Functionality implied by ID_AA64ZFR0_EL1.BF16 == 0b0010.
279     Functionality implied by ID_AA64ISAR2_EL1.CSSC == 0b0001.
282     Functionality implied by ID_AA64ISAR2_EL1.RPRFM == 0b0001.
285     Functionality implied by ID_AA64ZFR0_EL1.SVEver == 0b0010.
288     Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0001.
291     Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0010.
294     Functionality implied by ID_AA64SMFR0_EL1.I16I32 == 0b0101
297     Functionality implied by ID_AA64SMFR0_EL1.BI32I32 == 0b1
300     Functionality implied by ID_AA64SMFR0_EL1.B16B16 == 0b1
303     Functionality implied by ID_AA64SMFR0_EL1.F16F16 == 0b1
306     Functionality implied by ID_AA64ISAR2_EL1.MOPS == 0b0001.
309     Functionality implied by ID_AA64ISAR2_EL1.BC == 0b0001.
312     Functionality implied by ID_AA64ZFR0_EL1.B16B16 == 0b0001.
315     Functionality implied by ID_AA64ISAR1_EL1.LRCPC == 0b0011.
318     Functionality implied by ID_AA64ISAR0_EL1.Atomic == 0b0011.
321     Functionality implied by ID_AA64PFR2_EL1.FMR == 0b0001.
324     Functionality implied by ID_AA64ISAR2_EL1.LUT == 0b0001.
327     Functionality implied by ID_AA64ISAR3_EL1.FAMINMAX == 0b0001.
330     Functionality implied by ID_AA64FPFR0_EL1.F8CVT == 0b1.
333     Functionality implied by ID_AA64FPFR0_EL1.F8FMA == 0b1.
336     Functionality implied by ID_AA64FPFR0_EL1.F8DP4 == 0b1.
339     Functionality implied by ID_AA64FPFR0_EL1.F8DP2 == 0b1.
342     Functionality implied by ID_AA64FPFR0_EL1.F8E4M3 == 0b1.
345     Functionality implied by ID_AA64FPFR0_EL1.F8E5M2 == 0b1.
348     Functionality implied by ID_AA64SMFR0_EL1.LUTv2 == 0b1.
351     Functionality implied by ID_AA64SMFR0_EL1.F8F16 == 0b1.
354     Functionality implied by ID_AA64SMFR0_EL1.F8F32 == 0b1.
357     Functionality implied by ID_AA64SMFR0_EL1.SF8FMA == 0b1.
360     Functionality implied by ID_AA64SMFR0_EL1.SF8DP4 == 0b1.
363     Functionality implied by ID_AA64SMFR0_EL1.SF8DP2 == 0b1.
366     Functionality implied by ID_AA64SMFR0_EL1.SF8DP4 == 0b1.
369     Functionality implied by ID_AA64MMFR3_EL1.S1POE == 0b0001.