<snip> > >> > >> > > >> > The patch still holds true for CRC though as it is listed > >> > separately below > >> > https://urldefense.proofpoint.com/v2/url?u=https- > >3A__developer.arm.com_architectures_cpu-2Darchitecture_a- > >2D&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=E3SgYMjtKCMVsB- > >fmvgGV3o- > >g_fjLhk5Pupi9ijohpc&m=i3kC8htMiHjXMoJWUn6QlDVZQCblbFrIJyMcW > >d9nAmM&s=fA4SM6O3iC2HXIK1qSbOHzxVeHoYqcfUebEOwioHC7c&e= > >> > profile/exploration-tools/feature-names-for-a-profile > >CRC is mandatory starting in V8.1, refer to Arm-ARM document. > > > >> > > >> > Also, looks like sve2 support in n2 core might be optional as per > >above doc? > >> I need to check on this. Some of the info here might not be public yet. > >I found [1]. SVE2 is mandatory feature. > > > > I see thanks for the info I will remove extension from cnxk. > > Do you think the extension infra is still useful for other cases? i.e. older > cores > or cases where vendor wants to enable some extensions by default? > > I found a document[1] which describes about extensions not enabled by > default but supported by a given march. > In case of n2 I think memory tagging is one such feature I think the reference is providing a different information than what you are trying to achieve here.
It looks like you are trying to address a use case where in the same CPU IP has different features enabled/disabled on different SoCs. This is a valid use case from crypto perspective (due to export control reasons) where-in 2 different SoCs might have crypto enabled/disabled. I am not sure if other features can be enabled/disabled. But, Crypto feature is a good enough reason to address such a use case. IMO, we should capture the SoC specific details in SoC specific files, in this case in 'arm64_cn10k_linux_gcc'. I believe there were some challenges in doing this. Juraj, do you remember the exact issue? > > [1]https://developer.arm.com/tools-and-software/open-source- > software/developer-tools/gnu-toolchain/architecture-support > > > >[1] https://urldefense.proofpoint.com/v2/url?u=https- > >3A__developer.arm.com_ip- > >2Dproducts_processors_neoverse_neoverse- > >2Dn2&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=E3SgYMjtKCMVsB- > >fmvgGV3o- > >g_fjLhk5Pupi9ijohpc&m=i3kC8htMiHjXMoJWUn6QlDVZQCblbFrIJyMcW > >d9nAmM&s=kP_X-Co0cl4pZ64BZqy5rAFUlkMZE-3EhTVBabm3SW8&e= > > > ><snip>
