From: Peter Zijlstra <peterz@infradead.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>, Kees Cook <keescook@chromium.org>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH v2 3/3] efi: x86: Wire up IBT annotation in memory attributes table
Date: Wed, 8 Feb 2023 18:30:25 +0100 [thread overview]
Message-ID: <Y+PcMTyZkeVWy8n5@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20230206124938.272988-4-ardb@kernel.org>
On Mon, Feb 06, 2023 at 01:49:38PM +0100, Ard Biesheuvel wrote:
> UEFI v2.10 extends the EFI memory attributes table with a flag that
> indicates whether or not all RuntimeServicesCode regions were
> constructed with ENDBR landing pads, permitting the OS to map these
> regions with IBT restrictions enabled.
>
> So let's take this into account on x86 as well.
>
> Suggested-by: Peter Zijlstra <peterz@infradead.org> # ibt_save() changes
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Looks about right; would be lovely if someone with a fresh enough
firmware image could actually test this though..
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
next prev parent reply other threads:[~2023-02-08 17:31 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-06 12:49 [PATCH v2 0/3] efi: Enable BTI for EFI runtimes services Ard Biesheuvel
2023-02-06 12:49 ` [PATCH v2 1/3] efi: Discover BTI support in runtime services regions Ard Biesheuvel
2023-02-06 12:49 ` [PATCH v2 2/3] efi: arm64: Wire up BTI annotation in memory attributes table Ard Biesheuvel
2023-02-08 13:00 ` Will Deacon
2023-02-08 13:03 ` Ard Biesheuvel
2023-02-08 14:25 ` Mark Rutland
2023-02-08 14:36 ` Ard Biesheuvel
2023-02-09 14:21 ` Ard Biesheuvel
2023-02-09 15:13 ` Mark Rutland
2023-02-09 15:48 ` Will Deacon
2023-02-20 15:53 ` Mark Brown
2023-02-20 16:46 ` Ard Biesheuvel
2023-02-06 12:49 ` [PATCH v2 3/3] efi: x86: Wire up IBT " Ard Biesheuvel
2023-02-08 15:17 ` Dave Hansen
2023-02-08 20:14 ` Peter Zijlstra
2023-02-08 20:55 ` Mark Rutland
2023-02-09 16:13 ` Kees Cook
2023-02-09 16:23 ` Ard Biesheuvel
2023-02-09 16:27 ` Dave Hansen
2023-02-09 16:37 ` Kees Cook
2023-02-08 17:30 ` Peter Zijlstra [this message]
2023-02-08 12:35 ` [PATCH v2 0/3] efi: Enable BTI for EFI runtimes services Ard Biesheuvel
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