From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH] ARM: cpuinfo: print exception level
Date: Thu, 2 Jun 2022 12:28:50 +0200 [thread overview]
Message-ID: <20220602102850.3421547-1-a.fatoum@pengutronix.de> (raw)
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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next reply other threads:[~2022-06-02 10:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-02 10:28 Ahmad Fatoum [this message]
2022-06-03 6:50 ` Sascha Hauer
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