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authorClément Léger <clement.leger@bootlin.com>2022-06-06 16:57:01 +0200
committerClaudiu Beznea <claudiu.beznea@microchip.com>2022-07-20 11:05:48 +0300
commit3b5a7ca7d252b96e9623b262414713828b2bd68f (patch)
treeeed183f9bcc26fb67a08bc5c992fac86aec8dca7 /arch/arm/mach-at91
parentc71572aa544ca64cbd2ff2052c79bc7e3573baed (diff)
ARM: at91: setup outer cache .write_sec() callback if needed
When running under OP-TEE, the L2 cache is configured by OP-TEE and the sam platform code does not allow any modification yet. Setup a dummy .write_sec() callback to avoid triggering exceptions when Linux tries to modify the L2 cache configuration. Signed-off-by: Clément Léger <clement.leger@bootlin.com> [claudiu.beznea: keep .init_early populated only for SAMA5D2, remove sam_secure_init() from sama5d2_init() as it is also called in sama5_secure_cache_init()] Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220606145701.185552-3-clement.leger@bootlin.com
Diffstat (limited to 'arch/arm/mach-at91')
-rw-r--r--arch/arm/mach-at91/sama5.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index de5dd28b392e..67ed68fbe3a5 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -9,13 +9,27 @@
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include <asm/outercache.h>
#include <asm/system_misc.h>
#include "generic.h"
#include "sam_secure.h"
+static void sama5_l2c310_write_sec(unsigned long val, unsigned reg)
+{
+ /* OP-TEE configures the L2 cache and does not allow modifying it yet */
+}
+
+static void __init sama5_secure_cache_init(void)
+{
+ sam_secure_init();
+ if (sam_linux_is_optee_available())
+ outer_cache.write_sec = sama5_l2c310_write_sec;
+}
+
static void __init sama5_dt_device_init(void)
{
of_platform_default_populate(NULL, NULL, NULL);
@@ -48,7 +62,6 @@ MACHINE_END
static void __init sama5d2_init(void)
{
of_platform_default_populate(NULL, NULL, NULL);
- sam_secure_init();
sama5d2_pm_init();
}
@@ -60,6 +73,7 @@ static const char *const sama5d2_compat[] __initconst = {
DT_MACHINE_START(sama5d2, "Atmel SAMA5")
/* Maintainer: Atmel */
.init_machine = sama5d2_init,
+ .init_early = sama5_secure_cache_init,
.dt_compat = sama5d2_compat,
.l2c_aux_mask = ~0UL,
MACHINE_END