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| author |   Clément Léger <clement.leger@bootlin.com> | 2022-06-06 16:57:01 +0200 |
|---|---|---|
| committer |   Claudiu Beznea <claudiu.beznea@microchip.com> | 2022-07-20 11:05:48 +0300 |
| commit | 3b5a7ca7d252b96e9623b262414713828b2bd68f (patch) | |
| tree | eed183f9bcc26fb67a08bc5c992fac86aec8dca7 | |
| parent | ARM: at91: add sam_linux_is_optee_available() function (diff) | |
| download | linux-dev-3b5a7ca7d252b96e9623b262414713828b2bd68f.tar.xz linux-dev-3b5a7ca7d252b96e9623b262414713828b2bd68f.zip | |
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
| -rw-r--r-- | arch/arm/mach-at91/sama5.c | 16 |
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 |