From patchwork Thu Feb 11 16:03:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 8282481 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0A2C89F1C0 for ; Thu, 11 Feb 2016 16:23:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5E3F7203B5 for ; Thu, 11 Feb 2016 16:23:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 94CB1203B0 for ; Thu, 11 Feb 2016 16:23:25 +0000 (UTC) Received: from localhost ([::1]:51394 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTu1c-0007wd-SR for patchwork-qemu-devel@patchwork.kernel.org; Thu, 11 Feb 2016 11:23:24 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41603) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTu1H-0007lM-Dj for qemu-devel@nongnu.org; Thu, 11 Feb 2016 11:23:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aTu1C-0005GW-Ir for qemu-devel@nongnu.org; Thu, 11 Feb 2016 11:23:03 -0500 Received: from mnementh.archaic.org.uk ([81.2.115.146]:41147) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aTu1C-0005GI-Bu; Thu, 11 Feb 2016 11:22:58 -0500 Received: from pm215 by mnementh.archaic.org.uk with local (Exim 4.84) (envelope-from ) id 1aTtiL-0007IU-Kb; Thu, 11 Feb 2016 16:03:29 +0000 From: Peter Maydell To: qemu-devel@nongnu.org Date: Thu, 11 Feb 2016 16:03:26 +0000 Message-Id: <1455206609-28009-4-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1455206609-28009-1-git-send-email-peter.maydell@linaro.org> References: <1455206609-28009-1-git-send-email-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 81.2.115.146 Cc: "Edgar E. Iglesias" , Sergey Fedorov , qemu-arm@nongnu.org, patches@linaro.org Subject: [Qemu-devel] [PATCH v2 3/6] target-arm: Implement MDCR_EL3.TDOSA and MDCR_EL2.TDOSA traps X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Implement the traps to EL2 and EL3 controlled by the bits MDCR_EL2.TDOSA MDCR_EL3.TDOSA. These can configurably trap accesses to the "powerdown debug" registers. Signed-off-by: Peter Maydell Reviewed-by: Sergey Fedorov --- target-arm/cpu.h | 12 ++++++++++++ target-arm/helper.c | 23 ++++++++++++++++++++++- 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/target-arm/cpu.h b/target-arm/cpu.h index afbf366..77f9b51 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -595,6 +595,18 @@ void pmccntr_sync(CPUARMState *env); #define CPTR_TTA (1U << 20) #define CPTR_TFP (1U << 10) +#define MDCR_EPMAD (1U << 21) +#define MDCR_EDAD (1U << 20) +#define MDCR_SPME (1U << 17) +#define MDCR_SDD (1U << 16) +#define MDCR_TDRA (1U << 11) +#define MDCR_TDOSA (1U << 10) +#define MDCR_TDA (1U << 9) +#define MDCR_TDE (1U << 8) +#define MDCR_HPME (1U << 7) +#define MDCR_TPM (1U << 6) +#define MDCR_TPMCR (1U << 5) + #define CPSR_M (0x1fU) #define CPSR_T (1U << 5) #define CPSR_F (1U << 6) diff --git a/target-arm/helper.c b/target-arm/helper.c index 4d27c00..b45d596 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -385,6 +385,24 @@ static CPAccessResult access_trap_aa32s_el1(CPUARMState *env, return CP_ACCESS_TRAP_UNCATEGORIZED; } +/* Check for traps to "powerdown debug" registers, which are controlled + * by MDCR.TDOSA + */ +static CPAccessResult access_tdosa(CPUARMState *env, const ARMCPRegInfo *ri, + bool isread) +{ + int el = arm_current_el(env); + + if (el < 2 && (env->cp15.mdcr_el2 & MDCR_TDOSA) + && !arm_is_secure_below_el3(env)) { + return CP_ACCESS_TRAP_EL2; + } + if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDOSA)) { + return CP_ACCESS_TRAP_EL3; + } + return CP_ACCESS_OK; +} + static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { ARMCPU *cpu = arm_env_get_cpu(env); @@ -3778,15 +3796,18 @@ static const ARMCPRegInfo debug_cp_reginfo[] = { { .name = "OSLAR_EL1", .state = ARM_CP_STATE_BOTH, .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4, .access = PL1_W, .type = ARM_CP_NO_RAW, + .accessfn = access_tdosa, .writefn = oslar_write }, { .name = "OSLSR_EL1", .state = ARM_CP_STATE_BOTH, .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 4, .access = PL1_R, .resetvalue = 10, + .accessfn = access_tdosa, .fieldoffset = offsetof(CPUARMState, cp15.oslsr_el1) }, /* Dummy OSDLR_EL1: 32-bit Linux will read this */ { .name = "OSDLR_EL1", .state = ARM_CP_STATE_BOTH, .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 3, .opc2 = 4, - .access = PL1_RW, .type = ARM_CP_NOP }, + .access = PL1_RW, .accessfn = access_tdosa, + .type = ARM_CP_NOP }, /* Dummy DBGVCR: Linux wants to clear this on startup, but we don't * implement vector catch debug events yet. */