From patchwork Mon Mar 23 17:05:39 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 453549 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4C72A140157 for ; Tue, 24 Mar 2015 04:06:15 +1100 (AEDT) Received: from localhost ([::1]:57157 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya5np-00067c-Bw for incoming@patchwork.ozlabs.org; Mon, 23 Mar 2015 13:06:13 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52160) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya5n5-0005AQ-5V for qemu-devel@nongnu.org; Mon, 23 Mar 2015 13:05:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ya5mx-0005yh-S8 for qemu-devel@nongnu.org; Mon, 23 Mar 2015 13:05:26 -0400 Received: from static.88-198-71-155.clients.your-server.de ([88.198.71.155]:35906 helo=socrates.bennee.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ya5mx-0005y3-MJ for qemu-devel@nongnu.org; Mon, 23 Mar 2015 13:05:19 -0400 Received: from localhost ([127.0.0.1] helo=zen.linaroharston) by socrates.bennee.com with esmtp (Exim 4.80) (envelope-from ) id 1Ya6rD-0005wQ-8q; Mon, 23 Mar 2015 19:13:47 +0100 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Mon, 23 Mar 2015 17:05:39 +0000 Message-Id: <1427130344-27986-2-git-send-email-alex.bennee@linaro.org> X-Mailer: git-send-email 2.3.2 In-Reply-To: <1427130344-27986-1-git-send-email-alex.bennee@linaro.org> References: <1427130344-27986-1-git-send-email-alex.bennee@linaro.org> X-SA-Exim-Connect-IP: 127.0.0.1 X-SA-Exim-Mail-From: alex.bennee@linaro.org X-SA-Exim-Scanned: No (on socrates.bennee.com); SAEximRunCond expanded to false X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 88.198.71.155 Cc: Peter Maydell , kvm@vger.kernel.org, marc.zyngier@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org Subject: [Qemu-devel] [PATCH v5 1/6] target-arm: Store SPSR_EL1 state in banked_spsr[1] (SPSR_svc) 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Peter Maydell The AArch64 SPSR_EL1 register is architecturally mandated to be mapped to the AArch32 SPSR_svc register. This means its state should live in QEMU's env->banked_spsr[1] field. Correct the various places in the code that incorrectly put it in banked_spsr[0]. Signed-off-by: Peter Maydell diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index 7e0d038..861f6fa 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -523,7 +523,7 @@ void aarch64_cpu_do_interrupt(CPUState *cs) aarch64_save_sp(env, arm_current_el(env)); env->elr_el[new_el] = env->pc; } else { - env->banked_spsr[0] = cpsr_read(env); + env->banked_spsr[aarch64_banked_spsr_index(new_el)] = cpsr_read(env); if (!env->thumb) { env->cp15.esr_el[new_el] |= 1 << 25; } diff --git a/target-arm/helper.c b/target-arm/helper.c index 10886c5..d77c6de 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2438,7 +2438,7 @@ static const ARMCPRegInfo v8_cp_reginfo[] = { { .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64, .type = ARM_CP_ALIAS, .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0, - .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[0]) }, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[1]) }, /* We rely on the access checks not allowing the guest to write to the * state field when SPSel indicates that it's being used as the stack * pointer. diff --git a/target-arm/internals.h b/target-arm/internals.h index bb171a7..2cc3017 100644 --- a/target-arm/internals.h +++ b/target-arm/internals.h @@ -82,11 +82,14 @@ static inline void arm_log_exception(int idx) /* * For AArch64, map a given EL to an index in the banked_spsr array. + * Note that this mapping and the AArch32 mapping defined in bank_number() + * must agree such that the AArch64<->AArch32 SPSRs have the architecturally + * mandated mapping between each other. */ static inline unsigned int aarch64_banked_spsr_index(unsigned int el) { static const unsigned int map[4] = { - [1] = 0, /* EL1. */ + [1] = 1, /* EL1. */ [2] = 6, /* EL2. */ [3] = 7, /* EL3. */ };