Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966231Ab3HHTUH (ORCPT ); Thu, 8 Aug 2013 15:20:07 -0400 Received: from mms1.broadcom.com ([216.31.210.17]:3857 "EHLO mms1.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966162Ab3HHTUE (ORCPT ); Thu, 8 Aug 2013 15:20:04 -0400 X-Server-Uuid: 06151B78-6688-425E-9DE2-57CB27892261 From: "Christian Daudt" To: "Christian Daudt" cc: "Russell King" , "Arnd Bergmann" , "Markus Mayer" , "Stephen Warren" , "Shawn Guo" , "Olof Johansson" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ARM: bcm: Make secure API call optional Date: Thu, 8 Aug 2013 12:19:54 -0700 Message-ID: <1375989594-12193-1-git-send-email-csd@broadcom.com> X-Mailer: git-send-email 1.7.10.4 MIME-Version: 1.0 X-WSS-ID: 7E1D31FF31W82352161-01-01 Content-Type: text/plain Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2932 Lines: 99 The current bcm_kona_smc_init function throws a BUG_ON if there's no SMC device node defined in the device tree. Since secure API access is optional depending the chip configuration, fix this by allowing the rest of the code to run even if there's no SMC device node defined Reviewed-by: Markus Mayer Signed-off-by: Christian Daudt diff --git a/arch/arm/mach-bcm/bcm_kona_smc.c b/arch/arm/mach-bcm/bcm_kona_smc.c index 56d9d19..e32c1b3 100644 --- a/arch/arm/mach-bcm/bcm_kona_smc.c +++ b/arch/arm/mach-bcm/bcm_kona_smc.c @@ -41,13 +41,14 @@ static const struct of_device_id bcm_kona_smc_ids[] __initconst = { }; /* Map in the bounce area */ -void __init bcm_kona_smc_init(void) +int __init bcm_kona_smc_init(void) { struct device_node *node; /* Read buffer addr and size from the device tree node */ node = of_find_matching_node(NULL, bcm_kona_smc_ids); - BUG_ON(!node); + if (!node) + return -ENODEV; /* Don't care about size or flags of the DT node */ bridge_data.buffer_addr = @@ -59,7 +60,9 @@ void __init bcm_kona_smc_init(void) bridge_data.initialized = 1; - pr_info("Secure API initialized!\n"); + pr_info("Kona Secure API initialized\n"); + + return 0; } /* __bcm_kona_smc() should only run on CPU 0, with pre-emption disabled */ diff --git a/arch/arm/mach-bcm/bcm_kona_smc.h b/arch/arm/mach-bcm/bcm_kona_smc.h index 3bedbed1..d098a7e 100644 --- a/arch/arm/mach-bcm/bcm_kona_smc.h +++ b/arch/arm/mach-bcm/bcm_kona_smc.h @@ -64,7 +64,7 @@ #define SSAPI_BRCM_START_VC_CORE 0x0E000008 #ifndef __ASSEMBLY__ -extern void bcm_kona_smc_init(void); +extern int __init bcm_kona_smc_init(void); extern unsigned bcm_kona_smc(unsigned service_id, unsigned arg0, diff --git a/arch/arm/mach-bcm/board_bcm.c b/arch/arm/mach-bcm/board_bcm.c index 2859932..70cc44f 100644 --- a/arch/arm/mach-bcm/board_bcm.c +++ b/arch/arm/mach-bcm/board_bcm.c @@ -29,15 +29,18 @@ static int __init kona_l2_cache_init(void) if (!IS_ENABLED(CONFIG_CACHE_L2X0)) return 0; + if (bcm_kona_smc_init() < 0) { + pr_info("Kona secure API not available. Skipping L2 init\n"); + return 0; + } + bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0); /* * The aux_val and aux_mask have no effect since L2 cache is already * enabled. Pass 0s for aux_val and 1s for aux_mask for default value. */ - l2x0_of_init(0, ~0); - - return 0; + return l2x0_of_init(0, ~0); } static void __init board_init(void) @@ -45,8 +48,6 @@ static void __init board_init(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, &platform_bus); - bcm_kona_smc_init(); - kona_l2_cache_init(); } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/