linux-kernel - Re: [PATCH -next v6 1/8] entry: Split generic entry into generic exception and syscall entry

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Message-ID: <20250429150353.GA26272@willie-the-truck>
Date: Tue, 29 Apr 2025 16:03:54 +0100
From: Will Deacon <will@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: tglx@...utronix.de, ruanjinjie@...wei.com, catalin.marinas@....com,
	oleg@...hat.com, sstabellini@...nel.org, peterz@...radead.org,
	luto@...nel.org, linux-kernel@...r.kernel.org, arnd@...db.de,
	paulmck@...nel.org, mingo@...hat.com, dietmar.eggemann@....com,
	linux-arm-kernel@...ts.infradead.org, mark.rutland@....com,
	joey.gouly@....com, kevin.brodsky@....com, dave.martin@....com
Subject: Re: [PATCH -next v6 1/8] entry: Split generic entry into generic
 exception and syscall entry

On Mon, Apr 28, 2025 at 04:46:02PM +0200, Linus Walleij wrote:
> Hi Thomas,
> 
> On Thu, Mar 20, 2025 at 3:26 PM Linus Walleij <linus.walleij@...aro.org> wrote:
> 
> > > Currently CONFIG_GENERIC_ENTRY enables both the generic exception
> > > entry logic and the generic syscall entry logic, which are otherwise
> > > loosely coupled.
> > >
> > > Introduce separate config options for these so that archtiectures can
> > > select the two independently. This will make it easier for
> > > architectures to migrate to generic entry code.
> > >
> > > Suggested-by: Mark Rutland <mark.rutland@....com>
> > > Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
> >
> > If the generic entry maintainer (hi Thomas) thinks this patch is
> > OK it would be nice to have it applied because it will also make
> > the ARM32 transition to generic entry easier as we can work on
> > exception and syscall entry each in isolation.
> >
> > Acked-by: Linus Walleij <linus.walleij@...aro.org>
> 
> Do you think this patch is something you could queue on some
> tip branch for v6.16?
> 
> I don't know if either arm64 or arm32 is going anywhere with
> generic entry for v6.16, but having this in-tree makes it easier
> to split the task going forward. We can always pull it into some
> branch or just wait for v6.16-rc1 to get this patch under our
> patch stacks.

Agreed, having the core part merged would be really helpful if possible.

Cheers,

Will