From patchwork Thu Mar 31 00:01:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Atish Kumar Patra X-Patchwork-Id: 12796580 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 48A20C433EF for ; Thu, 31 Mar 2022 00:12:48 +0000 (UTC) Received: from localhost ([::1]:58426 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nZiQh-0000jt-BI for qemu-devel@archiver.kernel.org; Wed, 30 Mar 2022 20:12:47 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33902) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nZiG1-00058S-ID for qemu-devel@nongnu.org; Wed, 30 Mar 2022 20:01:46 -0400 Received: from [2607:f8b0:4864:20::62a] (port=36512 helo=mail-pl1-x62a.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nZiFz-0005VE-LI for qemu-devel@nongnu.org; Wed, 30 Mar 2022 20:01:45 -0400 Received: by mail-pl1-x62a.google.com with SMTP id m18so17042271plx.3 for ; Wed, 30 Mar 2022 17:01:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=vU/vwN9FVTXagwqbEnS8hrShalxb2jy8QJbiaHA11Qs=; b=2a1uWBYZCbcjVKXvmC6Kit6ze9jkegwjLnD6lvz+KJBkMucx6uwHxpBtIQLlOhPAC8 DdFUt4eO74NwdIKjejjjzOc+9r7vpO96lF1mgsggQlpTEMOGvWlv3ksGjK0CCtzX+bKp vUgFsNZCN6PMXBcwaJq8sTNG9SkW47tR1rEcvStiDgdp13bfBFkmAw0GOD5OnYWG1Xm/ 4+jGVJuv8h6RTDsYWzvHF7P1UKeYixMW6RvsItehEcr3PfVR1QoLpr1sEr44Z71nC6ek 4N1Ni44dxcroMmMGk9B12+awUESl3nh12xYNFzk8Ob2baLFn5vhmDjuA8Ggo1dsAr2jz TsHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=vU/vwN9FVTXagwqbEnS8hrShalxb2jy8QJbiaHA11Qs=; b=FOnjeb/Xn/oTwRR1Rh2fIOuOrWjztURVURTXeWB5lwS6i8no1mgCKNJ/Ce0e6f+FJU uIqsBxzNhLe2rsdmZLSci3zgyFDMx8ldr7N105Ad9u8eECPg49/2Sn3qrPXsEY91NvPJ 9XYXAZXQOrfXULEcGrE6UmZt8A8i3RV4jUL1q9m5rnQXb1pUlingXRXBn9R6zfbqFgJ7 JAE1107Z2cPf+rTp1StEwc/fS7u15eiMmnBEGTL+vjNhOZjZztyGLH+X/VWEI4FpxuMI rYOsPbXntBbcVhu6/mXAK84w/uPUyW6svvaGiyXfdMv5EjhPtSXIXagq5ka8ZaTMV1m7 XhaA== X-Gm-Message-State: AOAM5305NsCsiRdb5b243XGdLBvvqB2sHMcjrq7GhOBRz8He5pIMZQAe QD9SibUY6kArIlyeH1GzvsDC0r6AdrNIiw== X-Google-Smtp-Source: ABdhPJyeYeet/NE8ej4etsJBQ9IPpFVY4zjnsIn6wGG/AfKN1kzUbhI9ZOfsPMGmNmEMCzDzdFET4g== X-Received: by 2002:a17:902:e5c8:b0:154:7d7d:20ab with SMTP id u8-20020a170902e5c800b001547d7d20abmr2368239plf.29.1648684901975; Wed, 30 Mar 2022 17:01:41 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id ij17-20020a17090af81100b001c67c964d93sm8891669pjb.2.2022.03.30.17.01.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Mar 2022 17:01:41 -0700 (PDT) From: Atish Patra To: qemu-devel@nongnu.org Subject: [PATCH v7 04/12] target/riscv: pmu: Make number of counters configurable Date: Wed, 30 Mar 2022 17:01:18 -0700 Message-Id: <20220331000127.2107823-5-atishp@rivosinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220331000127.2107823-1-atishp@rivosinc.com> References: <20220331000127.2107823-1-atishp@rivosinc.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::62a (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::62a; envelope-from=atishp@rivosinc.com; helo=mail-pl1-x62a.google.com X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-riscv@nongnu.org, Bin Meng , Atish Patra , Alistair Francis , Palmer Dabbelt , Bin Meng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The RISC-V privilege specification provides flexibility to implement any number of counters from 29 programmable counters. However, the QEMU implements all the counters. Make it configurable through pmu config parameter which now will indicate how many programmable counters should be implemented by the cpu. Reviewed-by: Bin Meng Reviewed-by: Alistair Francis Signed-off-by: Atish Patra Signed-off-by: Atish Patra --- target/riscv/cpu.c | 2 +- target/riscv/cpu.h | 2 +- target/riscv/csr.c | 94 ++++++++++++++++++++++++++++++---------------- 3 files changed, 63 insertions(+), 35 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 1995ed0d6979..f63602828680 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -794,7 +794,7 @@ static Property riscv_cpu_properties[] = { DEFINE_PROP_BOOL("u", RISCVCPU, cfg.ext_u, true), DEFINE_PROP_BOOL("v", RISCVCPU, cfg.ext_v, false), DEFINE_PROP_BOOL("h", RISCVCPU, cfg.ext_h, true), - DEFINE_PROP_BOOL("pmu", RISCVCPU, cfg.ext_pmu, true), + DEFINE_PROP_UINT8("pmu-num", RISCVCPU, cfg.pmu_num, 16), DEFINE_PROP_BOOL("Zifencei", RISCVCPU, cfg.ext_ifencei, true), DEFINE_PROP_BOOL("Zicsr", RISCVCPU, cfg.ext_icsr, true), DEFINE_PROP_BOOL("Zfh", RISCVCPU, cfg.ext_zfh, false), diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 92bad7e35e4d..47319dbce4b9 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -378,7 +378,6 @@ struct RISCVCPUConfig { bool ext_zbb; bool ext_zbc; bool ext_zbs; - bool ext_pmu; bool ext_ifencei; bool ext_icsr; bool ext_svinval; @@ -396,6 +395,7 @@ struct RISCVCPUConfig { /* Vendor-specific custom extensions */ bool ext_XVentanaCondOps; + uint8_t pmu_num; char *priv_spec; char *user_spec; char *bext_spec; diff --git a/target/riscv/csr.c b/target/riscv/csr.c index f1b264b2c7a4..e2d17b619877 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -71,9 +71,17 @@ static RISCVException ctr(CPURISCVState *env, int csrno) CPUState *cs = env_cpu(env); RISCVCPU *cpu = RISCV_CPU(cs); int ctr_index; + int base_csrno = CSR_HPMCOUNTER3; + bool rv32 = riscv_cpu_mxl(env) == MXL_RV32 ? true : false; - if (!cpu->cfg.ext_pmu) { - /* The PMU extension is not enabled */ + if (rv32 && csrno >= CSR_CYCLEH) { + /* Offset for RV32 hpmcounternh counters */ + base_csrno += 0x80; + } + ctr_index = csrno - base_csrno; + + if (!cpu->cfg.pmu_num || ctr_index >= (cpu->cfg.pmu_num)) { + /* No counter is enabled in PMU or the counter is out of range */ return RISCV_EXCP_ILLEGAL_INST; } @@ -101,7 +109,7 @@ static RISCVException ctr(CPURISCVState *env, int csrno) } break; } - if (riscv_cpu_mxl(env) == MXL_RV32) { + if (rv32) { switch (csrno) { case CSR_CYCLEH: if (!get_field(env->mcounteren, COUNTEREN_CY)) { @@ -156,7 +164,7 @@ static RISCVException ctr(CPURISCVState *env, int csrno) } break; } - if (riscv_cpu_mxl(env) == MXL_RV32) { + if (rv32) { switch (csrno) { case CSR_CYCLEH: if (!get_field(env->hcounteren, COUNTEREN_CY) && @@ -200,6 +208,26 @@ static RISCVException ctr32(CPURISCVState *env, int csrno) } #if !defined(CONFIG_USER_ONLY) +static RISCVException mctr(CPURISCVState *env, int csrno) +{ + CPUState *cs = env_cpu(env); + RISCVCPU *cpu = RISCV_CPU(cs); + int ctr_index; + int base_csrno = CSR_MHPMCOUNTER3; + + if ((riscv_cpu_mxl(env) == MXL_RV32) && csrno >= CSR_MCYCLEH) { + /* Offset for RV32 mhpmcounternh counters */ + base_csrno += 0x80; + } + ctr_index = csrno - base_csrno; + if (!cpu->cfg.pmu_num || ctr_index >= cpu->cfg.pmu_num) { + /* The PMU is not enabled or counter is out of range*/ + return RISCV_EXCP_ILLEGAL_INST; + } + + return RISCV_EXCP_NONE; +} + static RISCVException any(CPURISCVState *env, int csrno) { return RISCV_EXCP_NONE; @@ -3571,35 +3599,35 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = { [CSR_HPMCOUNTER30] = { "hpmcounter30", ctr, read_zero }, [CSR_HPMCOUNTER31] = { "hpmcounter31", ctr, read_zero }, - [CSR_MHPMCOUNTER3] = { "mhpmcounter3", any, read_zero }, - [CSR_MHPMCOUNTER4] = { "mhpmcounter4", any, read_zero }, - [CSR_MHPMCOUNTER5] = { "mhpmcounter5", any, read_zero }, - [CSR_MHPMCOUNTER6] = { "mhpmcounter6", any, read_zero }, - [CSR_MHPMCOUNTER7] = { "mhpmcounter7", any, read_zero }, - [CSR_MHPMCOUNTER8] = { "mhpmcounter8", any, read_zero }, - [CSR_MHPMCOUNTER9] = { "mhpmcounter9", any, read_zero }, - [CSR_MHPMCOUNTER10] = { "mhpmcounter10", any, read_zero }, - [CSR_MHPMCOUNTER11] = { "mhpmcounter11", any, read_zero }, - [CSR_MHPMCOUNTER12] = { "mhpmcounter12", any, read_zero }, - [CSR_MHPMCOUNTER13] = { "mhpmcounter13", any, read_zero }, - [CSR_MHPMCOUNTER14] = { "mhpmcounter14", any, read_zero }, - [CSR_MHPMCOUNTER15] = { "mhpmcounter15", any, read_zero }, - [CSR_MHPMCOUNTER16] = { "mhpmcounter16", any, read_zero }, - [CSR_MHPMCOUNTER17] = { "mhpmcounter17", any, read_zero }, - [CSR_MHPMCOUNTER18] = { "mhpmcounter18", any, read_zero }, - [CSR_MHPMCOUNTER19] = { "mhpmcounter19", any, read_zero }, - [CSR_MHPMCOUNTER20] = { "mhpmcounter20", any, read_zero }, - [CSR_MHPMCOUNTER21] = { "mhpmcounter21", any, read_zero }, - [CSR_MHPMCOUNTER22] = { "mhpmcounter22", any, read_zero }, - [CSR_MHPMCOUNTER23] = { "mhpmcounter23", any, read_zero }, - [CSR_MHPMCOUNTER24] = { "mhpmcounter24", any, read_zero }, - [CSR_MHPMCOUNTER25] = { "mhpmcounter25", any, read_zero }, - [CSR_MHPMCOUNTER26] = { "mhpmcounter26", any, read_zero }, - [CSR_MHPMCOUNTER27] = { "mhpmcounter27", any, read_zero }, - [CSR_MHPMCOUNTER28] = { "mhpmcounter28", any, read_zero }, - [CSR_MHPMCOUNTER29] = { "mhpmcounter29", any, read_zero }, - [CSR_MHPMCOUNTER30] = { "mhpmcounter30", any, read_zero }, - [CSR_MHPMCOUNTER31] = { "mhpmcounter31", any, read_zero }, + [CSR_MHPMCOUNTER3] = { "mhpmcounter3", mctr, read_zero }, + [CSR_MHPMCOUNTER4] = { "mhpmcounter4", mctr, read_zero }, + [CSR_MHPMCOUNTER5] = { "mhpmcounter5", mctr, read_zero }, + [CSR_MHPMCOUNTER6] = { "mhpmcounter6", mctr, read_zero }, + [CSR_MHPMCOUNTER7] = { "mhpmcounter7", mctr, read_zero }, + [CSR_MHPMCOUNTER8] = { "mhpmcounter8", mctr, read_zero }, + [CSR_MHPMCOUNTER9] = { "mhpmcounter9", mctr, read_zero }, + [CSR_MHPMCOUNTER10] = { "mhpmcounter10", mctr, read_zero }, + [CSR_MHPMCOUNTER11] = { "mhpmcounter11", mctr, read_zero }, + [CSR_MHPMCOUNTER12] = { "mhpmcounter12", mctr, read_zero }, + [CSR_MHPMCOUNTER13] = { "mhpmcounter13", mctr, read_zero }, + [CSR_MHPMCOUNTER14] = { "mhpmcounter14", mctr, read_zero }, + [CSR_MHPMCOUNTER15] = { "mhpmcounter15", mctr, read_zero }, + [CSR_MHPMCOUNTER16] = { "mhpmcounter16", mctr, read_zero }, + [CSR_MHPMCOUNTER17] = { "mhpmcounter17", mctr, read_zero }, + [CSR_MHPMCOUNTER18] = { "mhpmcounter18", mctr, read_zero }, + [CSR_MHPMCOUNTER19] = { "mhpmcounter19", mctr, read_zero }, + [CSR_MHPMCOUNTER20] = { "mhpmcounter20", mctr, read_zero }, + [CSR_MHPMCOUNTER21] = { "mhpmcounter21", mctr, read_zero }, + [CSR_MHPMCOUNTER22] = { "mhpmcounter22", mctr, read_zero }, + [CSR_MHPMCOUNTER23] = { "mhpmcounter23", mctr, read_zero }, + [CSR_MHPMCOUNTER24] = { "mhpmcounter24", mctr, read_zero }, + [CSR_MHPMCOUNTER25] = { "mhpmcounter25", mctr, read_zero }, + [CSR_MHPMCOUNTER26] = { "mhpmcounter26", mctr, read_zero }, + [CSR_MHPMCOUNTER27] = { "mhpmcounter27", mctr, read_zero }, + [CSR_MHPMCOUNTER28] = { "mhpmcounter28", mctr, read_zero }, + [CSR_MHPMCOUNTER29] = { "mhpmcounter29", mctr, read_zero }, + [CSR_MHPMCOUNTER30] = { "mhpmcounter30", mctr, read_zero }, + [CSR_MHPMCOUNTER31] = { "mhpmcounter31", mctr, read_zero }, [CSR_MHPMEVENT3] = { "mhpmevent3", any, read_zero }, [CSR_MHPMEVENT4] = { "mhpmevent4", any, read_zero },