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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72aad8164d3sm2002539b3a.15.2024.12.19.17.56.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Dec 2024 17:56:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1734659792; x=1735264592; 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=QQS//T0GoR55hAf+FcAjZTbaJGtVUJI7ZxjrQ9eUp70=; b=guAuf3zt9xT7EQ5xYXd6igJA0YR3r2WGDN749Jhm6KwBt/D9TJiwLHfcYndvxVe0Y2 qnX+mly1E85Lx61K4WUIpRjqsFTORcC2O94tiGst1w77fEVP5EXruIUdIb/bataDR50q 19Wr5GtjP712BrXUriH15Icz500NtlDS4J8vCHAXRj/zRhtZR0RxaKe9tlgq8f2ryvRe ShW79U9KVofQ/cAGSdSexe1WEW10Y9xQqCWhoU55n+9iDdKb6lBelikRbCbwdZKO5g2v KLL5PL+nxz47Ofx4VnYhq+QSz00/2YIysNB74EOZJDt+m5mHXHRcJHExQ7pDnUE9EaeV UJOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734659792; x=1735264592; 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=QQS//T0GoR55hAf+FcAjZTbaJGtVUJI7ZxjrQ9eUp70=; b=cpPYurYc7+RUV10GfYmLPmI6tcZAe8qntLYbCfBmNgP3qO1uEYqctBWuSKoWFRLV40 N7/dOBIiHwfyD+h+SNQMwysZS4VRlRJwm/tHvD2xZpRJBDX4gcBF4NQbiwwW3w35ntPW feDHGQZEfU9WxVMnlZZOIZncaHN4NSZ5ifQ1LrIa7bEjdiBZIktKKTSZFe6L6OTAaoQl 2Ed7YWTs7ACpU1PiaCIM+tGUiteE1rR7+PC2216sGBeM4wHs+rxhjuzH17OWo/YWAy8Z /fZ1k7Owmzpp0zxUqbfa+iQFh3zm+T4gtSXLgeuLLKAR5HPw5mZrHbDVJhbcKcLB6naj 2oNw== X-Gm-Message-State: AOJu0Yx371Ncr2azx4HwGTctVNIUCXd0A/W2v11GLYr3HUqd6UX0ZPhq re9WouoyTX5CaCqg5VO6K+80x/U7T5qkSDhyLSVl2eGIcf6x9DJmq83annC6 X-Gm-Gg: ASbGncs3dm66ZrXka3HkEodgUS6tv57tHzV3FMgtEjW0yDLs6knjOrF/6SQSziF0rTJ 7q6RFe6sVvGvNYJ5j6hFcjoObZn5hHOAYYF5PmS8YKHtcQefxAF0loN1nD5h62mQ2gjs4dlZMIs XMKTkW+C1s2mkGlrXbpDnu+ZLdXRwBiZLmz1g65Onqz/5h6EBXUD2DP/e714by8HZpQMVy5+fBN nOl469GcVK80Qku0LSgoVOjp/eZu9W2d1pjy/++XtCZKUvacj6d9IaiGuyHJnCshRRYCWT1sPC5 4OtEfSMCcjcuWnAfbTO1ZgAj3vT4BAsgqYsEE+gEAG2JTMpAumZy5cjL7oWRHLU= X-Google-Smtp-Source: AGHT+IE55mt7DO3RWxj3kXcbY5uEPu3BwY+mCh9aihNZaseidsXdt90HyvJ/HK8AS7RvXaUDh9Tghw== X-Received: by 2002:a05:6a20:6a24:b0:1db:ff9d:1560 with SMTP id adf61e73a8af0-1e5e0484baemr2196547637.18.1734659791640; Thu, 19 Dec 2024 17:56:31 -0800 (PST) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, "Fea.Wang" , Frank Chang , Daniel Henrique Barboza , Jim Shu , Alistair Francis Subject: [PULL v2 32/39] target/riscv: Check memory access to meet svukte rule Date: Fri, 20 Dec 2024 11:54:32 +1000 Message-ID: <20241220015441.317236-33-alistair.francis@wdc.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241220015441.317236-1-alistair.francis@wdc.com> References: <20241220015441.317236-1-alistair.francis@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::42b; envelope-from=alistair23@gmail.com; helo=mail-pf1-x42b.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1734659812323116600 Content-Type: text/plain; charset="utf-8" From: "Fea.Wang" Follow the Svukte spec, do the memory access address checking 1. Include instruction fetches or explicit memory accesses 2. System run in effective privilege U or VU 3. Check senvcfg[UKTE] being set, or hstatus[HUKTE] being set if instruction is HLV, HLVX, HSV and execute from U mode to VU mode 4. Depend on Sv39 and check virtual addresses bit[SXLEN-1] 5. Raises a page-fault exception corresponding to the original access type. Ref: https://github.com/riscv/riscv-isa-manual/pull/1564/files Signed-off-by: Frank Chang Signed-off-by: Fea.Wang Signed-off-by: Daniel Henrique Barboza Reviewed-by: Jim Shu Reviewed-by: Daniel Henrique Barboza Reviewed-by: Alistair Francis Message-ID: <20241203034932.25185-5-fea.wang@sifive.com> Signed-off-by: Alistair Francis --- target/riscv/cpu_helper.c | 55 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 45806f5ab0..750c0537ca 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -857,6 +857,55 @@ static int get_physical_address_pmp(CPURISCVState *env= , int *prot, hwaddr addr, return TRANSLATE_SUCCESS; } =20 +/* Returns 'true' if a svukte address check is needed */ +static bool do_svukte_check(CPURISCVState *env, bool first_stage, + int mode, bool virt) +{ + /* Svukte extension depends on Sv39. */ + if (!(env_archcpu(env)->cfg.ext_svukte || + !first_stage || + VM_1_10_SV39 !=3D get_field(env->satp, SATP64_MODE))) { + return false; + } + + /* + * Check hstatus.HUKTE if the effective mode is switched to VU-mode by + * executing HLV/HLVX/HSV in U-mode. + * For other cases, check senvcfg.UKTE. + */ + if (env->priv =3D=3D PRV_U && !env->virt_enabled && virt) { + if (!get_field(env->hstatus, HSTATUS_HUKTE)) { + return false; + } + } else if (!get_field(env->senvcfg, SENVCFG_UKTE)) { + return false; + } + + /* + * Svukte extension is qualified only in U or VU-mode. + * + * Effective mode can be switched to U or VU-mode by: + * - M-mode + mstatus.MPRV=3D1 + mstatus.MPP=3DU-mode. + * - Execute HLV/HLVX/HSV from HS-mode + hstatus.SPVP=3D0. + * - U-mode. + * - VU-mode. + * - Execute HLV/HLVX/HSV from U-mode + hstatus.HU=3D1. + */ + if (mode !=3D PRV_U) { + return false; + } + + return true; +} + +static bool check_svukte_addr(CPURISCVState *env, vaddr addr) +{ + /* svukte extension excludes RV32 */ + uint32_t sxlen =3D 32 * riscv_cpu_sxl(env); + uint64_t high_bit =3D addr & (1UL << (sxlen - 1)); + return !high_bit; +} + /* * get_physical_address - get the physical address for this virtual address * @@ -894,6 +943,7 @@ static int get_physical_address(CPURISCVState *env, hwa= ddr *physical, MemTxResult res; MemTxAttrs attrs =3D MEMTXATTRS_UNSPECIFIED; int mode =3D mmuidx_priv(mmu_idx); + bool virt =3D mmuidx_2stage(mmu_idx); bool use_background =3D false; hwaddr ppn; int napot_bits =3D 0; @@ -901,6 +951,11 @@ static int get_physical_address(CPURISCVState *env, hw= addr *physical, bool is_sstack_idx =3D ((mmu_idx & MMU_IDX_SS_WRITE) =3D=3D MMU_IDX_SS= _WRITE); bool sstack_page =3D false; =20 + if (do_svukte_check(env, first_stage, mode, virt) && + !check_svukte_addr(env, addr)) { + return TRANSLATE_FAIL; + } + /* * Check if we should use the background registers for the two * stage translation. We don't need to check if we actually need --=20 2.47.1