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From: Lucas Stach <l.stach@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH v3 05/10] ARM: don't try to install secure monitor when entered in HYP mode
Date: Mon, 26 Mar 2018 21:20:20 +0200	[thread overview]
Message-ID: <20180326192025.28809-5-l.stach@pengutronix.de> (raw)
In-Reply-To: <20180326192025.28809-1-l.stach@pengutronix.de>

When Barebox has been entered in HYP mode, the CPU is already switched
to the non-secure world and it's not possible for Barebox to install
it's own secure monitor.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Roland Hieber <r.hieber@pengutronix.de>
---
 arch/arm/cpu/sm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/cpu/sm.c b/arch/arm/cpu/sm.c
index 5808dfd92bdc..71bb394c8540 100644
--- a/arch/arm/cpu/sm.c
+++ b/arch/arm/cpu/sm.c
@@ -184,6 +184,9 @@ int armv7_secure_monitor_install(void)
 		return -EINVAL;
 	}
 
+	if (__boot_cpu_mode == HYP_MODE)
+		return 0;
+
 	mmuon = get_cr() & CR_M;
 
 	vbar = get_vbar();
-- 
2.16.1


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  parent reply	other threads:[~2018-03-26 19:20 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-26 19:20 [PATCH v3 01/10] ARM: import opcode helpers from Linux kernel Lucas Stach
2018-03-26 19:20 ` [PATCH v3 02/10] ARM: safely switch from HYP to SVC mode if required Lucas Stach
2018-03-26 19:20 ` [PATCH v3 03/10] ARM: allow secure monitor code to be built without PSCI Lucas Stach
2018-03-26 19:20 ` [PATCH v3 04/10] ARM: add file for HYP mode related setup Lucas Stach
2018-04-05  7:30   ` Sascha Hauer
2018-04-05  7:47   ` Sascha Hauer
2018-04-05  7:54   ` Sascha Hauer
2018-04-10 10:53     ` Lucas Stach
2018-04-11  8:41       ` Sascha Hauer
2018-03-26 19:20 ` Lucas Stach [this message]
2018-03-26 19:20 ` [PATCH v3 06/10] ARM: default to starting kernel in HYP mode when entered in HYP Lucas Stach
2018-03-26 19:20 ` [PATCH v3 07/10] ARM: install HYP vectors at PBL and Barebox entry Lucas Stach
2018-04-05  7:42   ` Sascha Hauer
2018-04-10 10:34     ` Lucas Stach
2018-03-26 19:20 ` [PATCH v3 08/10] ARM: rpi: add revision IDs for Pi 3 Model B and Pi Zero Lucas Stach
2018-03-26 19:20 ` [PATCH v3 09/10] ARM: rpi: add raspberry pi 3 support Lucas Stach
2018-09-16 15:09   ` Alexander Dahl
2018-09-17 10:34     ` Roland Hieber
2018-03-26 19:20 ` [PATCH v3 10/10] ARM: rpi: autosize malloc area Lucas Stach

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