From patchwork Wed Jan 3 18:57:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Baturo X-Patchwork-Id: 13510431 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 DB5FEC47079 for ; Wed, 3 Jan 2024 18:59:39 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rL6Qu-0005A3-6y; Wed, 03 Jan 2024 13:57:40 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rL6Qr-000582-EO; Wed, 03 Jan 2024 13:57:37 -0500 Received: from mail-lf1-x12b.google.com ([2a00:1450:4864:20::12b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rL6Qo-00041m-Qs; Wed, 03 Jan 2024 13:57:36 -0500 Received: by mail-lf1-x12b.google.com with SMTP id 2adb3069b0e04-50eaabc36bcso242588e87.2; Wed, 03 Jan 2024 10:57:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704308253; x=1704913053; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iIwoM4vO0k49agOYoe2ighuS+OSbTKBks6BP+HYYuV0=; b=lInANEI/NyTdgJbHW9GQRmlqadT6/1Cq81wbOLjuLq5FiIiCqfD7/IwDreRE8C3YEX 1f3p8PLImS3W3KeMAW/xReeZoyR9QmLQ2elh582GFGOs6RBwssXgiGROr8svsTHq8eXE HrEmer5SWIz0G6QagClLkVrpRgWuP2k7dhRZYOv6c0o3wvQ54e45vBkLgfUsMWn4VxT4 i70HVIJM0FgJouo7VrTMR3lOwOD7tKiyAWqmfxliQqF7sbxphxb8EP7QZlHZC93/urkg YimbTqbDPqAzwmIJ5OjsgouPadQQ/zbhJ3JExYSFhMBQI0iOIauj+WS941fZ2zwZWUOq s4hQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704308253; x=1704913053; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iIwoM4vO0k49agOYoe2ighuS+OSbTKBks6BP+HYYuV0=; b=M2f9WOZ9BwOPC0L3xbh1cOHitMnG+ip3H7xpKK1DSxhv9GcRfaMlekWA8MBFKj03hv rm96CnbEVa5woKrxSXqnjfLFUNFQNjKLVVV5i/yDZfph+uPP5BNrktN5mWV0KKtKkA4v Cc9mm566Af/U1WH2OQZUOKewaWD5UPTiFOuz5ku2MQkWkXdjoh3IgUhEyRJHIQBXMMK1 0zJckpAQ1qP1f2x8CrCinUDkms9tXOCvxiezPo71q6326Z5eM4gQKJiX5qE9nNFMjFIV 7+9NSOizAxDtHnQ/fSAIRforkJ6OaYgJGDBkjxsPjnIXVtZVbTrgmJyR9o5DWl4TyIA3 gv/w== X-Gm-Message-State: AOJu0Yzvox1yuBKokL/XMY23Y6s9DMbtpocJaAneu1fGl4MPBYLIXad4 3j1yVlb0wH6ubbHUe0wMhik= X-Google-Smtp-Source: AGHT+IGvQDz005KC4hYXqf/tYDpq3OreYXRsYXSnzAybLZIqrJKErR1WKoeay6dECbzSJWWeIaykww== X-Received: by 2002:ac2:51b5:0:b0:50e:66d4:dd43 with SMTP id f21-20020ac251b5000000b0050e66d4dd43mr8330422lfk.38.1704308252426; Wed, 03 Jan 2024 10:57:32 -0800 (PST) Received: from freya.midgard (broadband-188-255-126-251.ip.moscow.rt.ru. [188.255.126.251]) by smtp.gmail.com with ESMTPSA id ep16-20020a1709069b5000b00a27d5e9b3ebsm3897915ejc.105.2024.01.03.10.57.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Jan 2024 10:57:30 -0800 (PST) From: Alexey Baturo X-Google-Original-From: Alexey Baturo To: Cc: baturo.alexey@gmail.com, richard.henderson@linaro.org, zhiwei_liu@linux.alibaba.com, palmer@dabbelt.com, Alistair.Francis@wdc.com, sagark@eecs.berkeley.edu, kbastian@mail.uni-paderborn.de, qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v3 2/6] target/riscv: Add new CSR fields for S{sn, mn, m}pm extensions as part of Zjpm v0.8 Date: Wed, 3 Jan 2024 18:57:12 +0000 Message-Id: <20240103185716.1790546-3-me@deliversmonkey.space> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240103185716.1790546-1-me@deliversmonkey.space> References: <20240103185716.1790546-1-me@deliversmonkey.space> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::12b; envelope-from=baturo.alexey@gmail.com; helo=mail-lf1-x12b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alexey Baturo Signed-off-by: Alexey Baturo --- target/riscv/cpu.h | 8 ++++++++ target/riscv/cpu_bits.h | 3 +++ target/riscv/cpu_cfg.h | 3 +++ target/riscv/csr.c | 11 +++++++++++ target/riscv/machine.c | 6 ++++-- target/riscv/pmp.c | 13 ++++++++++--- target/riscv/pmp.h | 11 ++++++----- 7 files changed, 45 insertions(+), 10 deletions(-) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 73f7004936..bd379ee653 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -102,6 +102,14 @@ typedef enum { EXT_STATUS_DIRTY, } RISCVExtStatus; +/* Enum holds PMM field values for Zjpm v0.8 extension */ +typedef enum { + PMM_FIELD_DISABLED = 0, + PMM_FIELD_RESERVED = 1, + PMM_FIELD_PMLEN7 = 2, + PMM_FIELD_PMLEN16 = 3, +} RISCVPmPmm; + #define MMU_USER_IDX 3 #define MAX_RISCV_PMPS (16) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 1c92458a01..7cf1049bf4 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -715,6 +715,7 @@ typedef enum RISCVException { #define MENVCFG_CBIE (3UL << 4) #define MENVCFG_CBCFE BIT(6) #define MENVCFG_CBZE BIT(7) +#define MENVCFG_PMM (3ULL << 32) #define MENVCFG_ADUE (1ULL << 61) #define MENVCFG_PBMTE (1ULL << 62) #define MENVCFG_STCE (1ULL << 63) @@ -728,11 +729,13 @@ typedef enum RISCVException { #define SENVCFG_CBIE MENVCFG_CBIE #define SENVCFG_CBCFE MENVCFG_CBCFE #define SENVCFG_CBZE MENVCFG_CBZE +#define SENVCFG_PMM MENVCFG_PMM #define HENVCFG_FIOM MENVCFG_FIOM #define HENVCFG_CBIE MENVCFG_CBIE #define HENVCFG_CBCFE MENVCFG_CBCFE #define HENVCFG_CBZE MENVCFG_CBZE +#define HENVCFG_PMM MENVCFG_PMM #define HENVCFG_ADUE MENVCFG_ADUE #define HENVCFG_PBMTE MENVCFG_PBMTE #define HENVCFG_STCE MENVCFG_STCE diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index f4605fb190..201f8af6ae 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -113,6 +113,9 @@ struct RISCVCPUConfig { bool ext_ssaia; bool ext_sscofpmf; bool ext_smepmp; + bool ext_ssnpm; + bool ext_smnpm; + bool ext_smmpm; bool rvv_ta_all_1s; bool rvv_ma_all_1s; diff --git a/target/riscv/csr.c b/target/riscv/csr.c index ea4e1ac6ef..a67ba30494 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -527,6 +527,9 @@ static RISCVException have_mseccfg(CPURISCVState *env, int csrno) if (riscv_cpu_cfg(env)->ext_zkr) { return RISCV_EXCP_NONE; } + if (riscv_cpu_cfg(env)->ext_smmpm) { + return RISCV_EXCP_NONE; + } return RISCV_EXCP_ILLEGAL_INST; } @@ -2030,6 +2033,10 @@ static RISCVException write_menvcfg(CPURISCVState *env, int csrno, (cfg->ext_sstc ? MENVCFG_STCE : 0) | (cfg->ext_svadu ? MENVCFG_ADUE : 0); } + /* Update PMM field only if the value is valid according to Zjpm v0.8 */ + if (((val & MENVCFG_PMM) >> 32) != PMM_FIELD_RESERVED) { + mask |= MENVCFG_PMM; + } env->menvcfg = (env->menvcfg & ~mask) | (val & mask); return RISCV_EXCP_NONE; @@ -2074,6 +2081,10 @@ static RISCVException write_senvcfg(CPURISCVState *env, int csrno, target_ulong val) { uint64_t mask = SENVCFG_FIOM | SENVCFG_CBIE | SENVCFG_CBCFE | SENVCFG_CBZE; + /* Update PMM field only if the value is valid according to Zjpm v0.8 */ + if (((val & SENVCFG_PMM) >> 32) != PMM_FIELD_RESERVED) { + mask |= SENVCFG_PMM; + } RISCVException ret; ret = smstateen_acc_ok(env, 0, SMSTATEEN0_HSENVCFG); diff --git a/target/riscv/machine.c b/target/riscv/machine.c index 860fe56d43..5e9c5b43ab 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -153,9 +153,8 @@ static const VMStateDescription vmstate_vector = { static bool pointermasking_needed(void *opaque) { RISCVCPU *cpu = opaque; - CPURISCVState *env = &cpu->env; - return riscv_has_ext(env, RVJ); + return cpu->cfg.ext_ssnpm || cpu->cfg.ext_smnpm || cpu->cfg.ext_smmpm; } static const VMStateDescription vmstate_pointermasking = { @@ -164,6 +163,9 @@ static const VMStateDescription vmstate_pointermasking = { .minimum_version_id = 1, .needed = pointermasking_needed, .fields = (VMStateField[]) { + VMSTATE_UINTTL(env.mseccfg, RISCVCPU), + VMSTATE_UINTTL(env.senvcfg, RISCVCPU), + VMSTATE_UINTTL(env.menvcfg, RISCVCPU), VMSTATE_END_OF_LIST() } }; diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 162e88a90a..893ccd58d8 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -576,6 +576,12 @@ target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index) void mseccfg_csr_write(CPURISCVState *env, target_ulong val) { int i; + uint64_t mask = MSECCFG_MMWP | MSECCFG_MML; + + /* Update PMM field only if the value is valid according to Zjpm v0.8 */ + if (((val & MSECCFG_PMM) >> 32) != PMM_FIELD_RESERVED) { + mask |= MSECCFG_PMM; + } trace_mseccfg_csr_write(env->mhartid, val); @@ -591,12 +597,13 @@ void mseccfg_csr_write(CPURISCVState *env, target_ulong val) if (riscv_cpu_cfg(env)->ext_smepmp) { /* Sticky bits */ - val |= (env->mseccfg & (MSECCFG_MMWP | MSECCFG_MML)); - if ((val ^ env->mseccfg) & (MSECCFG_MMWP | MSECCFG_MML)) { + val |= (env->mseccfg & mask); + if ((val ^ env->mseccfg) & mask) { tlb_flush(env_cpu(env)); } } else { - val &= ~(MSECCFG_MMWP | MSECCFG_MML | MSECCFG_RLB); + mask |= MSECCFG_RLB; + val &= ~(mask); } env->mseccfg = val; diff --git a/target/riscv/pmp.h b/target/riscv/pmp.h index 9af8614cd4..b3ca51c26d 100644 --- a/target/riscv/pmp.h +++ b/target/riscv/pmp.h @@ -40,11 +40,12 @@ typedef enum { } pmp_am_t; typedef enum { - MSECCFG_MML = 1 << 0, - MSECCFG_MMWP = 1 << 1, - MSECCFG_RLB = 1 << 2, - MSECCFG_USEED = 1 << 8, - MSECCFG_SSEED = 1 << 9 + MSECCFG_MML = 1 << 0, + MSECCFG_MMWP = 1 << 1, + MSECCFG_RLB = 1 << 2, + MSECCFG_USEED = 1 << 8, + MSECCFG_SSEED = 1 << 9, + MSECCFG_PMM = 3UL << 32, } mseccfg_field_t; typedef struct {