From: Mark Rutland <mark.rutland@arm•com>
To: Will Deacon <will@kernel•org>
Cc: linux-arm-kernel@lists•infradead.org
Subject: Re: [BOOTWRAPPER PATCH] Enable TME for lower exception levels
Date: Tue, 27 Aug 2019 12:08:36 +0100 [thread overview]
Message-ID: <20190827110835.GC8000@lakrids.cambridge.arm.com> (raw)
In-Reply-To: <20190823145015.15974-1-will@kernel.org>
On Fri, Aug 23, 2019 at 03:50:15PM +0100, Will Deacon wrote:
> By default, TME is not available to exception levels below EL3, so
> enable it in SCR_EL3 if we detect that it is implemented.
>
> Signed-off-by: Will Deacon <will@kernel•org>
Applied, thanks!
Mark.
> ---
> arch/aarch64/boot.S | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
> index 74705cded338..c2fe92c90297 100644
> --- a/arch/aarch64/boot.S
> +++ b/arch/aarch64/boot.S
> @@ -48,6 +48,13 @@ _start:
> orr x0, x0, #(1 << 16) // AP key enable
> orr x0, x0, #(1 << 17) // AP insn enable
> 1:
> + /* Enable TME if present */
> + mrs x1, id_aa64isar0_el1
> + ubfx x1, x1, #24, #4
> + cbz x1, 1f
> +
> + orr x0, x0, #(1 << 34) // TME enable
> +1:
> #ifndef KERNEL_32
> orr x0, x0, #(1 << 10) // 64-bit EL2
> #endif
> --
> 2.11.0
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists•infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
prev parent reply other threads:[~2019-08-27 11:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 14:50 [BOOTWRAPPER PATCH] Enable TME for lower exception levels Will Deacon
2019-08-27 11:08 ` Mark Rutland [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190827110835.GC8000@lakrids.cambridge.arm.com \
--to=mark.rutland@arm$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=will@kernel$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox