From: Nathan Chancellor <nathan@kernel.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Sami Tolvanen <samitolvanen@google.com>,
Kees Cook <kees@kernel.org>,
Alexander Lobakin <aleksander.lobakin@intel.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Russell King <linux@armlinux.org.uk>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
Michal Kubiak <michal.kubiak@intel.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
intel-wired-lan@lists.osuosl.org
Subject: Re: [PATCH 2/3] ARM: Select ARCH_USES_CFI_GENERIC_LLVM_PASS
Date: Tue, 28 Oct 2025 10:52:43 -0700 [thread overview]
Message-ID: <20251028175243.GB1548965@ax162> (raw)
In-Reply-To: <CACRpkdaeOYEcK9w1oy59WBqjNrK7q5zT2rzg8pHgDdZdKWVKZg@mail.gmail.com>
On Mon, Oct 27, 2025 at 11:56:21PM +0100, Linus Walleij wrote:
> On Mon, Oct 27, 2025 at 4:54 PM Sami Tolvanen <samitolvanen@google.com> wrote:
> > Instead of working around issues with the generic pass, would it make
> > more sense to just disable arm32 CFI with older Clang versions
> > entirely? Linus, any thoughts?
>
> We have people using this with the default compilers that come with
> Debiand and Fedora. I would say as soon as the latest release of
> the major distributions supports this, we can drop support for older
> compilers.
Okay, I think that is reasonable enough. This is not a very large
workaround and I do not expect these type of workarounds to be necessary
frequently so I think it is worth keeping this working if people are
actually using it. That means we could mandate the backend version of
kCFI for ARM with Debian Forky in 2027.
Cheers,
Nathan
next prev parent reply other threads:[~2025-10-28 17:53 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-25 20:53 [PATCH 0/3] Resolve ARM kCFI build failure in idpf xsk.c Nathan Chancellor
2025-10-25 20:53 ` [PATCH 1/3] compiler_types: Introduce __nocfi_generic Nathan Chancellor
2025-10-25 20:53 ` [PATCH 2/3] ARM: Select ARCH_USES_CFI_GENERIC_LLVM_PASS Nathan Chancellor
2025-10-27 15:53 ` Sami Tolvanen
2025-10-27 20:59 ` Nathan Chancellor
2025-10-27 22:56 ` Linus Walleij
2025-10-28 17:52 ` Nathan Chancellor [this message]
2025-10-28 18:14 ` Sami Tolvanen
2025-10-30 3:04 ` Kees Cook
2025-10-25 20:53 ` [PATCH 3/3] libeth: xdp: Disable generic kCFI pass for libeth_xdp_tx_xmit_bulk() Nathan Chancellor
2025-10-27 11:09 ` Przemek Kitszel
2025-10-27 20:36 ` Nathan Chancellor
2025-10-27 14:59 ` Alexander Lobakin
2025-10-27 20:54 ` Nathan Chancellor
2025-10-28 16:29 ` Alexander Lobakin
2025-10-28 22:01 ` Nathan Chancellor
2025-10-28 7:31 ` [Intel-wired-lan] " Loktionov, Aleksandr
2025-10-30 3:06 ` [PATCH 0/3] Resolve ARM kCFI build failure in idpf xsk.c Kees Cook
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