From: Kees Cook <keescook@chromium.org>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH 0/2] efi: Enable BTI for EFI runtimes services
Date: Thu, 2 Feb 2023 17:37:16 +0000 [thread overview]
Message-ID: <63dbf4cd.a70a0220.d9b66.920b@mx.google.com> (raw)
In-Reply-To: <20230201132540.2196065-1-ardb@kernel.org>
On Wed, Feb 01, 2023 at 02:25:38PM +0100, Ard Biesheuvel wrote:
> The EFI spec v2.10 introduces a global flag in the memory attributes
> table that indicates whether the EFI runtime code regions were emitted
> with BTI landing pads, and can therefore tolerate being mapped with BTI
> enforcement enabled.
>
> Add the generic plumbing for this, and wire it up for arm64.
Looks nice! :)
Reviewed-by: Kees Cook <keescook@chromium.org>
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
>
> Ard Biesheuvel (2):
> efi: Discover BTI support in runtime services regions
> efi: arm64: Wire up BTI annotation in memory attributes table
>
> arch/arm/include/asm/efi.h | 2 +-
> arch/arm/kernel/efi.c | 5 +++--
> arch/arm64/include/asm/efi.h | 3 ++-
> arch/arm64/kernel/efi.c | 18 +++++++++++++++---
> arch/riscv/include/asm/efi.h | 2 +-
> arch/riscv/kernel/efi.c | 3 ++-
> arch/x86/platform/efi/efi_64.c | 3 ++-
> drivers/firmware/efi/memattr.c | 9 +++++++--
> include/linux/efi.h | 8 ++++++--
> 9 files changed, 39 insertions(+), 14 deletions(-)
>
> --
> 2.39.0
>
--
Kees Cook
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next prev parent reply other threads:[~2023-02-02 17:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 13:25 [PATCH 0/2] efi: Enable BTI for EFI runtimes services Ard Biesheuvel
2023-02-01 13:25 ` [PATCH 1/2] efi: Discover BTI support in runtime services regions Ard Biesheuvel
2023-02-01 13:25 ` [PATCH 2/2] efi: arm64: Wire up BTI annotation in memory attributes table Ard Biesheuvel
2023-02-02 17:37 ` Kees Cook [this message]
2023-02-04 8:23 ` [PATCH 0/2] efi: Enable BTI for EFI runtimes services Ard Biesheuvel
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