Re: [PATCH v7 09/11] riscv: cpufeature: Introduce ISA bases bitmap and rva23u64 detection

[Conor Dooley]

On Tue, Sep 15, 2026 at 03:15:35AM -0400, Guodong Xu wrote:
> Introduce a per-hart and host-wide bitmap of conformant ISA "bases"
> (named profile-class sets such as IMA and RVA23U64), computed at init
> time by riscv_init_isa_bases().
> 
> Register riscv_init_isa_bases() as an arch_initcall. That is late
> enough that core_initcall(tagged_addr_init) has probed senvcfg.PMM and
> populated have_user_pmlen_*; without that ordering,
> riscv_have_user_pmlen(7) would still return its default false and the
> RVA23U64 detection path would always bail. It is also early enough that
> arch_initcall_sync(init_hwprobe_vdso_data) finds the bases populated
> when it snapshots the hwprobe values into the vDSO data page.
> 
> Consider this as the cache that subsequent consumers (hwprobe's
> RVA23U64 base behavior bit, /proc/cpuinfo's "isa bases" lines, etc.)
> can read without recomputing, which keeps them consistent with
> each other.
> 
> Signed-off-by: Andrew Jones <andrew.jones@xxxxxxxxxxxxxxxx>
> Signed-off-by: Guodong Xu <guodong.xu@xxxxxxxxxxxxxxxx>

Something is wrong here with the signoffs here, Drew's probably missing
either authorship or a Co-developed-by tag?

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