From: "Vincenzo Palazzo" <vincenzopalazzodev@gmail.com>
To: "Jamie Cunliffe" <Jamie.Cunliffe@arm.com>,
<linux-arm-kernel@lists.infradead.org>,
<rust-for-linux@vger.kernel.org>
Cc: "Miguel Ojeda" <ojeda@kernel.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>, <steve.capper@arm.com>
Subject: Re: [PATCH 2/3] arm64: rust: Enable PAC support for Rust.
Date: Wed, 25 Jan 2023 20:54:56 +0100 [thread overview]
Message-ID: <CQ1J9TWLBW1M.1D77ETNZWGN1J@vincent> (raw)
In-Reply-To: <20230125163739.3798252-3-Jamie.Cunliffe@arm.com>
On Wed Jan 25, 2023 at 5:37 PM CET, Jamie Cunliffe wrote:
> Enable the PAC ret and BTI options in the Rust build flags to match
> the options that are used when building C.
>
> Signed-off-by: Jamie Cunliffe <Jamie.Cunliffe@arm.com>
Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
> ---
> arch/arm64/Makefile | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
> index d62bd221828f..b53ab6aa2dfe 100644
> --- a/arch/arm64/Makefile
> +++ b/arch/arm64/Makefile
> @@ -85,8 +85,10 @@ PACRET-$(CONFIG_UNWIND_PATCH_PAC_INTO_SCS) := pac-ret
>
> ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
> branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI) := -mbranch-protection=$(PACRET-y)+bti
> +KBUILD_RUSTFLAGS += -Z branch-protection=bti,pac-ret,leaf
> else
> branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=$(PACRET-y)
> +KBUILD_RUSTFLAGS += -Z branch-protection=pac-ret,leaf
> endif
> # -march=armv8.3-a enables the non-nops instructions for PAC, to avoid the
> # compiler to generate them and consequently to break the single image contract
> --
> 2.30.2
next prev parent reply other threads:[~2023-01-25 19:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-25 16:37 [PATCH 0/3] Rust enablement for AArch64 Jamie Cunliffe
2023-01-25 16:37 ` [PATCH 1/3] arm64: rust: Enable Rust support " Jamie Cunliffe
2023-01-25 19:50 ` Vincenzo Palazzo
2023-01-25 19:56 ` Vincenzo Palazzo
2023-01-26 16:35 ` Will Deacon
2023-01-26 17:56 ` Miguel Ojeda
2023-01-31 16:19 ` Will Deacon
2023-01-31 16:49 ` Björn Roy Baron
2023-01-31 18:55 ` Miguel Ojeda
2023-04-18 15:06 ` Jamie Cunliffe
2023-01-27 14:09 ` Gary Guo
2023-05-02 13:41 ` Asahi Lina
2023-01-25 16:37 ` [PATCH 2/3] arm64: rust: Enable PAC support for Rust Jamie Cunliffe
2023-01-25 19:54 ` Vincenzo Palazzo [this message]
2023-01-25 16:37 ` [PATCH 3/3] arm64: rust: Disable neon and fp target features Jamie Cunliffe
2023-01-25 17:49 ` Miguel Ojeda
2023-01-25 19:55 ` Vincenzo Palazzo
2023-01-26 16:37 ` Will Deacon
2023-01-25 18:01 ` [PATCH 0/3] Rust enablement for AArch64 Miguel Ojeda
2023-03-07 9:32 ` Asahi Lina
2023-03-07 12:17 ` Miguel Ojeda
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