From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38745) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WuVtF-0007a7-Qa for qemu-devel@nongnu.org; Tue, 10 Jun 2014 19:55:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WuVt2-0004A5-3m for qemu-devel@nongnu.org; Tue, 10 Jun 2014 19:55:41 -0400 Received: from edge20.ethz.ch ([82.130.99.26]:2297) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WuVt1-00049r-QR for qemu-devel@nongnu.org; Tue, 10 Jun 2014 19:55:28 -0400 From: Fabian Aggeler Date: Wed, 11 Jun 2014 01:54:46 +0200 Message-ID: <1402444514-19658-5-git-send-email-aggelerf@ethz.ch> In-Reply-To: <1402444514-19658-1-git-send-email-aggelerf@ethz.ch> References: <1402444514-19658-1-git-send-email-aggelerf@ethz.ch> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v3 04/32] target-arm: add arm_is_secure() function List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, peter.crosthwaite@xilinx.com, greg.bellows@linaro.org, serge.fdrv@gmail.com, edgar.iglesias@gmail.com, christoffer.dall@linaro.org arm_is_secure() function allows to determine CPU security state if the CPU implements Security Extensions/EL3. arm_is_secure_below_el3() returns true if CPU is in secure state below EL3. Signed-off-by: Sergey Fedorov Signed-off-by: Fabian Aggeler --- target-arm/cpu.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 903aa01..cb0da6b 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -710,6 +710,44 @@ static inline int arm_feature(CPUARMState *env, int feature) return (env->features & (1ULL << feature)) != 0; } + +/* Return true if exception level below EL3 is in secure state */ +static inline bool arm_is_secure_below_el3(CPUARMState *env) +{ +#if !defined(CONFIG_USER_ONLY) + if (arm_feature(env, ARM_FEATURE_EL3)) { + return !(env->cp15.scr_el3 & SCR_NS); + } else if (arm_feature(env, ARM_FEATURE_EL2)) { + return false; + } else { + /* IMPDEF: QEMU defaults to non-secure */ + return false; + } +#else + return false; +#endif +} + +/* Return true if the processor is in secure state */ +static inline bool arm_is_secure(CPUARMState *env) +{ +#if !defined(CONFIG_USER_ONLY) + if (arm_feature(env, ARM_FEATURE_EL3)) { + if (env->aarch64 && extract32(env->pstate, 2, 2) == 3) { + /* CPU currently in Aarch64 state and EL3 */ + return true; + } else if (!env->aarch64 && + (env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_MON) { + /* CPU currently in Aarch32 state and monitor mode */ + return true; + } + } + return arm_is_secure_below_el3(env); +#else + return false; +#endif +} + /* Return true if the specified exception level is running in AArch64 state. */ static inline bool arm_el_is_aa64(CPUARMState *env, int el) { -- 1.8.3.2