[PATCH v15 10/11] arm64: entry: Convert to generic entry

[Will Deacon]

On Wed, Jun 24, 2026 at 04:32:17PM +0100, Ada Couprie Diaz wrote:
> On 11/05/2026 10:21, Jinjie Ruan wrote:
> > 3. Architecture-Specific Hooks (asm/entry-common.h):
> > - Implement arch_ptrace_report_syscall_entry() and _exit() by
> >    porting the existing arm64 logic to the generic interface.
> > 
> > - Add arch_syscall_is_vdso_sigreturn() to asm/syscall.h to
> >    support Syscall User Dispatch (SUD).
> Related to the above : I feel this is missing an important information.
> Given that SUD is only controlled by `CONFIG_GENERIC_ENTRY`,
> converting to generic entry _requires_ supporting SUD, so we do it here.
> I think this would be important to mention, as I otherwise felt like this
> change did not belong in this patch.
> 
> General question that follows : does it make sense to require an arch
> to support Syscall User Dispatch to be able to convert to generic entry ?
> (I assume not really, given that only `arch_syscall_is_vdso_sigreturn()` is
> required on the arch side, but I am curious)

I think SUD should be separated from generic entry. I'm certainly keen
on the latter for arm64 and far less interested in the former. See this
series from Gregory:

https://lore.kernel.org/all/20260627205551.769684-1-gourry@gourry.net/

Will