linux-kernel - Re: [PATCH v6 32/37] arm: Implement read

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAFLszTitpXdNWSDaL9SkBCDg4SeVPuh0_cHdBSLJFPNdjahOWQ@mail.gmail.com>
Date: Wed, 2 Oct 2024 16:55:36 -0600
From: Simon Glass <sjg@...omium.org>
To: Patrick Rudolph <patrick.rudolph@...ements.com>
Cc: u-boot@...ts.denx.de, linux-kernel@...r.kernel.org, 
	Tom Rini <trini@...sulko.com>
Subject: Re: [PATCH v6 32/37] arm: Implement read_mpidr on armv7

On Wed, 2 Oct 2024 at 03:57, Patrick Rudolph
<patrick.rudolph@...ements.com> wrote:
>
> Implement read_mpidr() on armv7 to make use of it in generic
> code that compiles on both armv7 and armv8.
>
> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
> ---
>  arch/arm/include/asm/system.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
>

Reviewed-by: Simon Glass <sjg@...omium.org>


> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
> index 7e30cac32a..94c6f8f134 100644
> --- a/arch/arm/include/asm/system.h
> +++ b/arch/arm/include/asm/system.h
> @@ -384,6 +384,15 @@ void switch_to_hypervisor_ret(void);
>  #define wfi()
>  #endif
>
> +static inline unsigned long read_mpidr(void)
> +{
> +       unsigned long val;
> +
> +       asm volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (val));
> +
> +       return val;
> +}
> +
>  static inline unsigned long get_cpsr(void)
>  {
>         unsigned long cpsr;
> --
> 2.46.2
>