From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Sami Tolvanen <samitolvanen@google.com>,
Kees Cook <keescook@chromium.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev
Subject: Re: [PATCH v8 0/9] CFI for ARM32 using LLVM
Date: Mon, 29 Apr 2024 14:21:56 +0100 [thread overview]
Message-ID: <Zi+e9M/f5b/Sto9H@shell.armlinux.org.uk> (raw)
In-Reply-To: <20240423-arm32-cfi-v8-0-08f10f5d9297@linaro.org>
I've applied this to a separate branch, and it should be in
linux-next by tomorrow.
As mentioned today on a previous iteration of the patch series,
I'm not all that happy with the introduction of delay-inducing
branches to solve CFI issues especially on the early CPUs where
a branch causes the CPUs pipeline to be flushed - thus making
branches expensive.
Can we make these branches conditional on the use of CFI?
Didn't Ard mention there was a way to do this using symbol aliases?
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2024-04-29 13:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 7:19 [PATCH v8 0/9] CFI for ARM32 using LLVM Linus Walleij
2024-04-23 7:19 ` [PATCH v8 1/9] ARM: mm: Make tlbflush routines CFI safe Linus Walleij
2024-04-23 7:19 ` [PATCH v8 3/9] ARM: mm: Use symbol alias for two cache functions Linus Walleij
2024-04-23 7:19 ` [PATCH v8 4/9] ARM: mm: Rewrite cacheflush vtables in CFI safe C Linus Walleij
2024-04-23 7:19 ` [PATCH v8 5/9] ARM: mm: Type-annotate all per-processor assembly routines Linus Walleij
2024-04-23 7:19 ` [PATCH v8 6/9] ARM: mm: Define prototypes for all per-processor calls Linus Walleij
2024-04-23 7:19 ` [PATCH v8 7/9] ARM: lib: Annotate loop delay instructions for CFI Linus Walleij
2024-04-23 7:19 ` [PATCH v8 8/9] ARM: hw_breakpoint: Handle CFI breakpoints Linus Walleij
2024-04-23 7:19 ` [PATCH v8 9/9] ARM: Support CLANG CFI Linus Walleij
2024-04-29 13:21 ` Russell King (Oracle) [this message]
2024-04-29 14:54 ` [PATCH v8 0/9] CFI for ARM32 using LLVM Ard Biesheuvel
2024-04-29 15:06 ` Sami Tolvanen
2024-04-30 7:43 ` Linus Walleij
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