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([103.97.165.210]) by smtp.googlemail.com with ESMTPSA id u6-20020a4a5706000000b00524fe20aee5sm1794323ooa.34.2023.04.14.09.02.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Apr 2023 09:02:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1681488152; x=1684080152; 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=WQVbdHSbmA0N99G9XPF6TNlMG0xte3LZeN6z59ov+BU=; b=CKbl05EwbGpv1672ElGDinynLnpWITeK/Hz8LH139VwpFsQhoH0fYmpOVvVuwqafXZ xgV4FXJYtLjI2slkG/JXrF6vw4d7rXNcm3BAiUpJiRbWxMglwxRu5RDHlFXPnRzOGEa1 8C8fRol7vENWicDA7rh0AyWwA9ZEZR86GAkMy65ieOEnlrG+5mcX9NVvjdK+M01LxZS3 fcrHOJojI4lMBfCMOqw2LgRLbLBdkdXcJE1MiYevAzEjt0Eqd1EB+DhG2U3B5GUjnQzu lwLBu4McBJCAuYNwi2ykudGtAk1LrbB0OFvKIF+IqCy+CzIX5Gj/3tQI9irgsE6sH6mG 4LhA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681488152; x=1684080152; 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=WQVbdHSbmA0N99G9XPF6TNlMG0xte3LZeN6z59ov+BU=; b=da6UfT88Lcs+3trMvZ26vj4uA5zpynvCXNE4AIXMIZaZbvSsa741RLYYhwkldEamSm Cll956ZobMUp9XhmgkqWUB0a/39sNHld/4BrQohSSbTB9dIRAZga1PX/yalod61HRx29 ElLfydLCzXUmeOGpdGGgGSGH4L29VfKA9vVQEA1zDa7z3uDwC17nDxDtHuPWaxofNfPn rFQfjbze/ggye+ZajIlYsxQvytiERaTyM/PfTod/sj4vEjwYZ5fqFb6z9aeFAQqSfXyG Fssmyv2iz86vt6nHogEcFqh+09r24vyINaaRbz5BncX34lieKo5v36EbC7XWawaSoyxE UDAQ== X-Gm-Message-State: AAQBX9eOGYYTzy0NTpUrestdOzoEaKnYnrvAVhzRXbx2KMPexnZ5RJdH ePwlZDDjhwmMxv6IfyOio58wEKLWQQ7yxZnh+m/NmQ== X-Google-Smtp-Source: AKy350ag/su92qFhP7++e91lFdSfaje/inSkP2rzTqQ911z55exq5oB6Q7CTv/Szx0Zwd+eEnNVFRQ== X-Received: by 2002:a05:6870:14d2:b0:17f:7dca:8926 with SMTP id l18-20020a05687014d200b0017f7dca8926mr4181249oab.20.1681488152316; Fri, 14 Apr 2023 09:02:32 -0700 (PDT) From: Mayuresh Chitale To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, alistair.francis@wdc.com Cc: Mayuresh Chitale , Alistair Francis , Daniel Barboza , liweiwei@iscas.ac.cn, Richard Henderson Subject: [RFC PATCH v2 1/4] target/riscv: smstateen check for fcsr Date: Fri, 14 Apr 2023 21:31:59 +0530 Message-Id: <20230414160202.1298242-2-mchitale@ventanamicro.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230414160202.1298242-1-mchitale@ventanamicro.com> References: <20230414160202.1298242-1-mchitale@ventanamicro.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=2001:4860:4864:20::35; envelope-from=mchitale@ventanamicro.com; helo=mail-oa1-x35.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, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ventanamicro.com) X-ZM-MESSAGEID: 1681488204798100002 Content-Type: text/plain; charset="utf-8" If smstateen is implemented and smtateen0.fcsr is clear and misa.F is off then the floating point operations must return illegal instruction exception or virtual instruction trap, if relevant. Signed-off-by: Mayuresh Chitale --- target/riscv/csr.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index f4d2dcfdc8..8ae9e95f9f 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -82,6 +82,10 @@ static RISCVException fs(CPURISCVState *env, int csrno) !riscv_cpu_cfg(env)->ext_zfinx) { return RISCV_EXCP_ILLEGAL_INST; } + + if (!env->debugger && !riscv_cpu_fp_enabled(env)) { + return smstateen_acc_ok(env, 0, SMSTATEEN0_FCSR); + } #endif return RISCV_EXCP_NONE; } @@ -2081,6 +2085,9 @@ static RISCVException write_mstateen0(CPURISCVState *= env, int csrno, target_ulong new_val) { uint64_t wr_mask =3D SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG; + if (!riscv_has_ext(env, RVF)) { + wr_mask |=3D SMSTATEEN0_FCSR; + } =20 return write_mstateen(env, csrno, wr_mask, new_val); } @@ -2117,6 +2124,10 @@ static RISCVException write_mstateen0h(CPURISCVState= *env, int csrno, { uint64_t wr_mask =3D SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG; =20 + if (!riscv_has_ext(env, RVF)) { + wr_mask |=3D SMSTATEEN0_FCSR; + } + return write_mstateenh(env, csrno, wr_mask, new_val); } =20 @@ -2154,6 +2165,10 @@ static RISCVException write_hstateen0(CPURISCVState = *env, int csrno, { uint64_t wr_mask =3D SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG; =20 + if (!riscv_has_ext(env, RVF)) { + wr_mask |=3D SMSTATEEN0_FCSR; + } + return write_hstateen(env, csrno, wr_mask, new_val); } =20 @@ -2193,6 +2208,10 @@ static RISCVException write_hstateen0h(CPURISCVState= *env, int csrno, { uint64_t wr_mask =3D SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG; =20 + if (!riscv_has_ext(env, RVF)) { + wr_mask |=3D SMSTATEEN0_FCSR; + } + return write_hstateenh(env, csrno, wr_mask, new_val); } =20 @@ -2240,6 +2259,10 @@ static RISCVException write_sstateen0(CPURISCVState = *env, int csrno, { uint64_t wr_mask =3D SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG; =20 + if (!riscv_has_ext(env, RVF)) { + wr_mask |=3D SMSTATEEN0_FCSR; + } + return write_sstateen(env, csrno, wr_mask, new_val); } =20 --=20 2.34.1