[PATCH] ARM: cpuinfo: print exception level

[PATCH] ARM: cpuinfo: print exception level

[Ahmad Fatoum]

barebox boot on ARMv8 usually involves switching exception level, but
nevertheless during bring up, it can be useful to query exception level
from the command line. Thus add it to cpuinfo output. There's no
straight equivalent for ARMv7, so we #ifdef it out for non-v8.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/arm/cpu/cpuinfo.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/cpu/cpuinfo.c b/arch/arm/cpu/cpuinfo.c
index 8a92432e904f..aea50e80d194 100644
--- a/arch/arm/cpu/cpuinfo.c
+++ b/arch/arm/cpu/cpuinfo.c
@@ -230,6 +230,10 @@ static int do_cpuinfo(int argc, char *argv[])
 			printf("core: %s r%up%u\n", part, major, minor);
 	}
 
+#ifdef CONFIG_CPU_64v8
+	printf("exception level: %u\n", current_el());
+#endif
+
 	if (cache & (1 << 24)) {
 		/* separate I/D cache */
 		printf("I-cache: ");
-- 
2.30.2


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Re: [PATCH] ARM: cpuinfo: print exception level

[Sascha Hauer]

On Thu, Jun 02, 2022 at 12:28:50PM +0200, Ahmad Fatoum wrote:
> barebox boot on ARMv8 usually involves switching exception level, but
> nevertheless during bring up, it can be useful to query exception level
> from the command line. Thus add it to cpuinfo output. There's no
> straight equivalent for ARMv7, so we #ifdef it out for non-v8.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
>  arch/arm/cpu/cpuinfo.c | 4 ++++
>  1 file changed, 4 insertions(+)

Applied, thanks

Sascha

> 
> diff --git a/arch/arm/cpu/cpuinfo.c b/arch/arm/cpu/cpuinfo.c
> index 8a92432e904f..aea50e80d194 100644
> --- a/arch/arm/cpu/cpuinfo.c
> +++ b/arch/arm/cpu/cpuinfo.c
> @@ -230,6 +230,10 @@ static int do_cpuinfo(int argc, char *argv[])
>  			printf("core: %s r%up%u\n", part, major, minor);
>  	}
>  
> +#ifdef CONFIG_CPU_64v8
> +	printf("exception level: %u\n", current_el());
> +#endif
> +
>  	if (cache & (1 << 24)) {
>  		/* separate I/D cache */
>  		printf("I-cache: ");
> -- 
> 2.30.2
> 
> 
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> 

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