From patchwork Tue Apr 17 20:37:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Lindsay X-Patchwork-Id: 10346809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 75AB9601D7 for ; Tue, 17 Apr 2018 20:51:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 638F7285B6 for ; Tue, 17 Apr 2018 20:51:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 62271285C3; Tue, 17 Apr 2018 20:51:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id E7345285BA for ; Tue, 17 Apr 2018 20:50:33 +0000 (UTC) Received: from localhost ([::1]:33410 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f8XYe-0004B7-Qc for patchwork-qemu-devel@patchwork.kernel.org; Tue, 17 Apr 2018 16:50:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51023) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f8XNs-0003Hh-OI for qemu-devel@nongnu.org; Tue, 17 Apr 2018 16:39:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f8XNn-0007d4-Cd for qemu-devel@nongnu.org; Tue, 17 Apr 2018 16:39:24 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:40318) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f8XNg-0006lH-DQ; Tue, 17 Apr 2018 16:39:12 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D066760FF7; Tue, 17 Apr 2018 20:39:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1523997551; bh=eQywwxTT5EzOjtfw9UAXBucHrz+66tDEx61Jdc+4vqI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A5zyQzm2gQ6jlMqO1sB2kRmnebmBc4dtpU9Dl4+EOKRUAs1h5+RpFUKZCUzPJ89ap NtU8Nw4lm5Eic97I1g8PBgfT4DzXv+4UBKZZaU9YYMYAFmymL3yB2CTSwqlceiMXYD 8Ojn5jOQwILdhSxx8wN99BBFXTMnzgNNQlbEnE68= Received: from mossypile.qualcomm.com (global_nat1_iad_fw.qualcomm.com [129.46.232.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: alindsay@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 18AFF60F74; Tue, 17 Apr 2018 20:39:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1523997544; bh=eQywwxTT5EzOjtfw9UAXBucHrz+66tDEx61Jdc+4vqI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iX4aIJGv1dQ6AeKpHwTCPomEs18aObx1VvsR56GJR1er7KFhe//im1Sgj6aJUMMP5 09X3olYsy9bL0IQIy/JnlefYg+ff19oqcro9qfeJ61qJlU4sMKwZwfIn/wlAEG1UMU 0kYB+M0Mi4ZkbMV5cMH4BmApWOTe3OtcrwZhxo8w= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 18AFF60F74 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=alindsay@codeaurora.org From: Aaron Lindsay To: qemu-arm@nongnu.org, Peter Maydell , Alistair Francis , Wei Huang , Peter Crosthwaite Date: Tue, 17 Apr 2018 16:37:59 -0400 Message-Id: <1523997485-1905-16-git-send-email-alindsay@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1523997485-1905-1-git-send-email-alindsay@codeaurora.org> References: <1523997485-1905-1-git-send-email-alindsay@codeaurora.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 198.145.29.96 Subject: [Qemu-devel] [PATCH v4 15/21] target/arm: Add array for supported PMU events, generate PMCEID[01] X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michael Spradling , qemu-devel@nongnu.org, Digant Desai Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This commit doesn't add any supported events, but provides the framework for adding them. We store the pm_event structs in a simple array, and provide the mapping from the event numbers to array indexes in the supported_event_map array. Because the value of PMCEID[01] depends upon which events are supported at runtime, generate it dynamically. Signed-off-by: Aaron Lindsay --- target/arm/cpu.c | 20 +++++++++++++------- target/arm/cpu.h | 10 ++++++++++ target/arm/cpu64.c | 2 -- target/arm/helper.c | 37 +++++++++++++++++++++++++++++++++++++ 4 files changed, 60 insertions(+), 9 deletions(-) diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 9d27ffc..22063ca 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -897,9 +897,19 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp) if (!cpu->has_pmu) { unset_feature(env, ARM_FEATURE_PMU); cpu->id_aa64dfr0 &= ~0xf00; - } else if (!kvm_enabled()) { - arm_register_pre_el_change_hook(cpu, &pmu_pre_el_change, 0); - arm_register_el_change_hook(cpu, &pmu_post_el_change, 0); + } + if (arm_feature(env, ARM_FEATURE_PMU)) { + uint64_t pmceid = get_pmceid(&cpu->env); + cpu->pmceid0 = pmceid & 0xffffffff; + cpu->pmceid1 = (pmceid >> 32) & 0xffffffff; + + if (!kvm_enabled()) { + arm_register_pre_el_change_hook(cpu, &pmu_pre_el_change, 0); + arm_register_el_change_hook(cpu, &pmu_post_el_change, 0); + } + } else { + cpu->pmceid0 = 0x00000000; + cpu->pmceid1 = 0x00000000; } if (!arm_feature(env, ARM_FEATURE_EL2)) { @@ -1511,8 +1521,6 @@ static void cortex_a7_initfn(Object *obj) cpu->id_pfr0 = 0x00001131; cpu->id_pfr1 = 0x00011011; cpu->id_dfr0 = 0x02010555; - cpu->pmceid0 = 0x00000000; - cpu->pmceid1 = 0x00000000; cpu->id_afr0 = 0x00000000; cpu->id_mmfr0 = 0x10101105; cpu->id_mmfr1 = 0x40000000; @@ -1557,8 +1565,6 @@ static void cortex_a15_initfn(Object *obj) cpu->id_pfr0 = 0x00001131; cpu->id_pfr1 = 0x00011011; cpu->id_dfr0 = 0x02010555; - cpu->pmceid0 = 0x0000000; - cpu->pmceid1 = 0x00000000; cpu->id_afr0 = 0x00000000; cpu->id_mmfr0 = 0x10201105; cpu->id_mmfr1 = 0x20000000; diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 132e08d..f058f5c 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -935,6 +935,16 @@ void pmu_op_finish(CPUARMState *env); void pmu_pre_el_change(ARMCPU *cpu, void *ignored); void pmu_post_el_change(ARMCPU *cpu, void *ignored); +/* + * get_pmceid + * @env: CPUARMState + * + * Return the PMCEID[01] register values corresponding to the counters which + * are supported given the current configuration (0 is low 32, 1 is high 32 + * bits) + */ +uint64_t get_pmceid(CPUARMState *env); + /* SCTLR bit meanings. Several bits have been reused in newer * versions of the architecture; in that case we define constants * for both old and new bit meanings. Code which tests against those diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 991d764..7da0ea4 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -141,8 +141,6 @@ static void aarch64_a57_initfn(Object *obj) cpu->id_isar5 = 0x00011121; cpu->id_aa64pfr0 = 0x00002222; cpu->id_aa64dfr0 = 0x10305106; - cpu->pmceid0 = 0x00000000; - cpu->pmceid1 = 0x00000000; cpu->id_aa64isar0 = 0x00011120; cpu->id_aa64mmfr0 = 0x00001124; cpu->dbgdidr = 0x3516d000; diff --git a/target/arm/helper.c b/target/arm/helper.c index 572709e..7a715a6 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -933,6 +933,43 @@ static inline uint64_t pmu_counter_mask(CPUARMState *env) return (1 << 31) | ((1 << pmu_num_counters(env)) - 1); } +typedef struct pm_event { + uint16_t number; /* PMEVTYPER.evtCount is 10 bits wide */ + /* If the event is supported on this CPU (used to generate PMCEID[01]) */ + bool (*supported)(CPUARMState *); + /* Retrieve the current count of the underlying event. The programmed + * counters hold a difference from the return value from this function */ + uint64_t (*get_count)(CPUARMState *); +} pm_event; + +#define SUPPORTED_EVENT_SENTINEL UINT16_MAX +static const pm_event pm_events[] = { + { .number = SUPPORTED_EVENT_SENTINEL } +}; +static uint16_t supported_event_map[0x3f]; + +/* + * Called upon initialization to build PMCEID0 (low 32 bits) and PMCEID1 (high + * 32). We also use it to build a map of ARM event numbers to indices in + * our pm_events array. + */ +uint64_t get_pmceid(CPUARMState *env) +{ + uint64_t pmceid = 0; + unsigned int i = 0; + while (pm_events[i].number != SUPPORTED_EVENT_SENTINEL) { + const pm_event *cnt = &pm_events[i]; + if (cnt->number < 0x3f && cnt->supported(env)) { + pmceid |= (1 << cnt->number); + supported_event_map[cnt->number] = i; + } else { + supported_event_map[cnt->number] = SUPPORTED_EVENT_SENTINEL; + } + i++; + } + return pmceid; +} + static CPAccessResult pmreg_access(CPUARMState *env, const ARMCPRegInfo *ri, bool isread) {