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* [PATCH] ARM: cpuinfo: print exception level
@ 2022-06-02 10:28 Ahmad Fatoum
  2022-06-03  6:50 ` Sascha Hauer
  0 siblings, 1 reply; 2+ messages in thread
From: Ahmad Fatoum @ 2022-06-02 10:28 UTC (permalink / raw)
  To: barebox; +Cc: 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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^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH] ARM: cpuinfo: print exception level
  2022-06-02 10:28 [PATCH] ARM: cpuinfo: print exception level Ahmad Fatoum
@ 2022-06-03  6:50 ` Sascha Hauer
  0 siblings, 0 replies; 2+ messages in thread
From: Sascha Hauer @ 2022-06-03  6:50 UTC (permalink / raw)
  To: Ahmad Fatoum; +Cc: barebox

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
> 
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

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