From patchwork Fri Jun 22 20:32:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Lindsay X-Patchwork-Id: 10482999 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 1D07C60383 for ; Fri, 22 Jun 2018 20:37:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0ECCB28F2D for ; Fri, 22 Jun 2018 20:37:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 035AB2900E; Fri, 22 Jun 2018 20:37:22 +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 4658F28F2D for ; Fri, 22 Jun 2018 20:37:21 +0000 (UTC) Received: from localhost ([::1]:36099 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fWSo4-0005uk-CX for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 Jun 2018 16:37:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54278) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fWSjb-00027O-US for qemu-devel@nongnu.org; Fri, 22 Jun 2018 16:32:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fWSja-0005Qk-Fx for qemu-devel@nongnu.org; Fri, 22 Jun 2018 16:32:43 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:45212) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fWSjW-0005PE-Qk; Fri, 22 Jun 2018 16:32:39 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id E47DE60588; Fri, 22 Jun 2018 20:32:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529699557; bh=kXuiWLwCGd8bfvAj9kqx2u3EggzImNyYC3Mp7UNH7PQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lk5nKgBSxcBEiYB7Wm4aRhhmJ8ajj+21FuX1JmIf12hPHoz1xVxkZwFJPSKm/EnQZ XEYjOXAqIIVYh9Or29ePT558dqkNvsNQDTi6b7Uk4xmv/nBix9Rt1zbCBZdB0aE1CA +EH/rXZ1j8Fy3LNJ5BS/v2BolS40e0hLUd3MyQd4= 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 C6EF760791; Fri, 22 Jun 2018 20:32:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529699556; bh=kXuiWLwCGd8bfvAj9kqx2u3EggzImNyYC3Mp7UNH7PQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pt31U8QuANhHUOAiTlHQlzxfyxtvPiyVZAGYBRx7hsRUrupoSbPu4wnjw8ZbhGmYI BjSKRzDseeziNhIcq8/XuoaFIH/ose/9aBLVWVsLek7ZT296d5t41oj4kDb+mWCZ4N DMptwO5+QdY6ShC8dFtG2t5NxwBrEgGnsj3IxgXs= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C6EF760791 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: Fri, 22 Jun 2018 16:32:16 -0400 Message-Id: <1529699547-17044-3-git-send-email-alindsay@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1529699547-17044-1-git-send-email-alindsay@codeaurora.org> References: <1529699547-17044-1-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 v5 02/13] target/arm: Filter cycle counter based on PMCCFILTR_EL0 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: Aaron Lindsay , 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 The pmu_counter_enabled and pmu_op_start/finish functions are generic (as opposed to PMCCNTR-specific) to allow for the implementation of other events. Signed-off-by: Aaron Lindsay Reviewed-by: Peter Maydell --- target/arm/cpu.c | 3 ++ target/arm/cpu.h | 22 +++++++++- target/arm/helper.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++----- 3 files changed, 129 insertions(+), 10 deletions(-) diff --git a/target/arm/cpu.c b/target/arm/cpu.c index e1de45e..08ce1bc 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -916,6 +916,9 @@ 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_EL2)) { diff --git a/target/arm/cpu.h b/target/arm/cpu.h index ba2c876..800c4ec 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -946,6 +946,24 @@ int cpu_arm_signal_handler(int host_signum, void *pinfo, void pmccntr_op_start(CPUARMState *env); void pmccntr_op_finish(CPUARMState *env); +/** + * pmu_op_start/finish + * @env: CPUARMState + * + * Convert all PMU counters between their delta form (the typical mode when + * they are enabled) and the guest-visible values. These two calls must + * surround any action which might affect the counters, and the return value + * from pmu_op_start must be supplied as the second argument to pmu_op_finish. + */ +void pmu_op_start(CPUARMState *env); +void pmu_op_finish(CPUARMState *env); + +/** + * Functions to register as EL change hooks for PMU mode filtering + */ +void pmu_pre_el_change(ARMCPU *cpu, void *ignored); +void pmu_post_el_change(ARMCPU *cpu, void *ignored); + /* 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 @@ -1007,7 +1025,8 @@ void pmccntr_op_finish(CPUARMState *env); #define MDCR_EPMAD (1U << 21) #define MDCR_EDAD (1U << 20) -#define MDCR_SPME (1U << 17) +#define MDCR_SPME (1U << 17) /* MDCR_EL3 */ +#define MDCR_HPMD (1U << 17) /* MDCR_EL2 */ #define MDCR_SDD (1U << 16) #define MDCR_SPD (3U << 14) #define MDCR_TDRA (1U << 11) @@ -1017,6 +1036,7 @@ void pmccntr_op_finish(CPUARMState *env); #define MDCR_HPME (1U << 7) #define MDCR_TPM (1U << 6) #define MDCR_TPMCR (1U << 5) +#define MDCR_HPMN (0x1fU) /* Not all of the MDCR_EL3 bits are present in the 32-bit SDCR */ #define SDCR_VALID_MASK (MDCR_EPMAD | MDCR_EDAD | MDCR_SPME | MDCR_SPD) diff --git a/target/arm/helper.c b/target/arm/helper.c index 23b3a16..7c66977 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -935,10 +935,20 @@ static const ARMCPRegInfo v6_cp_reginfo[] = { /* Definitions for the PMU registers */ #define PMCRN_MASK 0xf800 #define PMCRN_SHIFT 11 +#define PMCRDP 0x10 #define PMCRD 0x8 #define PMCRC 0x4 #define PMCRE 0x1 +#define PMXEVTYPER_P 0x80000000 +#define PMXEVTYPER_U 0x40000000 +#define PMXEVTYPER_NSK 0x20000000 +#define PMXEVTYPER_NSU 0x10000000 +#define PMXEVTYPER_NSH 0x08000000 +#define PMXEVTYPER_M 0x04000000 +#define PMXEVTYPER_MT 0x02000000 +#define PMXEVTYPER_EVTCOUNT 0x000003ff + static inline uint32_t pmu_num_counters(CPUARMState *env) { return (env->cp15.c9_pmcr & PMCRN_MASK) >> PMCRN_SHIFT; @@ -1034,16 +1044,66 @@ static CPAccessResult pmreg_access_ccntr(CPUARMState *env, return pmreg_access(env, ri, isread); } -static inline bool arm_ccnt_enabled(CPUARMState *env) +/* Returns true if the counter (pass 31 for PMCCNTR) should count events using + * the current EL, security state, and register configuration. + */ +static inline bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) { - /* This does not support checking PMCCFILTR_EL0 register */ + uint64_t filter; + bool e, p, u, nsk, nsu, nsh, m; + bool enabled, prohibited, filtered; + bool secure = arm_is_secure(env); + int el = arm_current_el(env); + uint8_t hpmn = env->cp15.mdcr_el2 & MDCR_HPMN; - if (!(env->cp15.c9_pmcr & PMCRE) || !(env->cp15.c9_pmcnten & (1 << 31))) { - return false; + if (!arm_feature(env, ARM_FEATURE_EL2) || + (counter < hpmn || counter == 31)) { + e = env->cp15.c9_pmcr & PMCRE; + } else { + e = env->cp15.mdcr_el2 & MDCR_HPME; + } + enabled = e && (env->cp15.c9_pmcnten & (1 << counter)); + + if (!secure) { + if (el == 2 && (counter < hpmn || counter == 31)) { + prohibited = env->cp15.mdcr_el2 & MDCR_HPMD; + } else { + prohibited = false; + } + } else { + prohibited = arm_feature(env, ARM_FEATURE_EL3) && + (env->cp15.mdcr_el3 & MDCR_SPME); } - return true; + if (prohibited && counter == 31) { + prohibited = env->cp15.c9_pmcr & PMCRDP; + } + + /* TODO Remove assert, set filter to correct PMEVTYPER */ + assert(counter == 31); + filter = env->cp15.pmccfiltr_el0; + + p = filter & PMXEVTYPER_P; + u = filter & PMXEVTYPER_U; + nsk = arm_feature(env, ARM_FEATURE_EL3) && (filter & PMXEVTYPER_NSK); + nsu = arm_feature(env, ARM_FEATURE_EL3) && (filter & PMXEVTYPER_NSU); + nsh = arm_feature(env, ARM_FEATURE_EL2) && (filter & PMXEVTYPER_NSH); + m = arm_el_is_aa64(env, 1) && + arm_feature(env, ARM_FEATURE_EL3) && (filter & PMXEVTYPER_M); + + if (el == 0) { + filtered = secure ? u : u != nsu; + } else if (el == 1) { + filtered = secure ? p : p != nsk; + } else if (el == 2) { + filtered = !nsh; + } else { /* EL3 */ + filtered = m != p; + } + + return enabled && !prohibited && !filtered; } + /* * Ensure c15_ccnt is the guest-visible count so that operations such as * enabling/disabling the counter or filtering, modifying the count itself, @@ -1056,7 +1116,7 @@ void pmccntr_op_start(CPUARMState *env) cycles = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), ARM_CPU_FREQ, NANOSECONDS_PER_SECOND); - if (arm_ccnt_enabled(env)) { + if (pmu_counter_enabled(env, 31)) { uint64_t eff_cycles = cycles; if (env->cp15.c9_pmcr & PMCRD) { /* Increment once every 64 processor clock cycles */ @@ -1075,7 +1135,7 @@ void pmccntr_op_start(CPUARMState *env) */ void pmccntr_op_finish(CPUARMState *env) { - if (arm_ccnt_enabled(env)) { + if (pmu_counter_enabled(env, 31)) { uint64_t prev_cycles = env->cp15.c15_ccnt_delta; if (env->cp15.c9_pmcr & PMCRD) { @@ -1087,10 +1147,30 @@ void pmccntr_op_finish(CPUARMState *env) } } +void pmu_op_start(CPUARMState *env) +{ + pmccntr_op_start(env); +} + +void pmu_op_finish(CPUARMState *env) +{ + pmccntr_op_finish(env); +} + +void pmu_pre_el_change(ARMCPU *cpu, void *ignored) +{ + pmu_op_start(&cpu->env); +} + +void pmu_post_el_change(ARMCPU *cpu, void *ignored) +{ + pmu_op_finish(&cpu->env); +} + static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { - pmccntr_op_start(env); + pmu_op_start(env); if (value & PMCRC) { /* The counter has been reset */ @@ -1101,7 +1181,7 @@ static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, env->cp15.c9_pmcr &= ~0x39; env->cp15.c9_pmcr |= (value & 0x39); - pmccntr_op_finish(env); + pmu_op_finish(env); } static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri) @@ -1150,6 +1230,22 @@ void pmccntr_op_finish(CPUARMState *env) { } +void pmu_op_start(CPUARMState *env) +{ +} + +void pmu_op_finish(CPUARMState *env) +{ +} + +void pmu_pre_el_change(ARMCPU *cpu, void *ignored) +{ +} + +void pmu_post_el_change(ARMCPU *cpu, void *ignored) +{ +} + #endif static void pmccfiltr_write(CPUARMState *env, const ARMCPRegInfo *ri,