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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fc0bba949bsm81999385ad.69.2024.07.17.19.11.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jul 2024 19:11:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1721268693; x=1721873493; 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=SigXo9JFKeTNramL+H42np6aFUN6W3LsbIdms9vmOc4=; b=MkA+zambbCQBFTi3Ui0cLYeQEPoqRUWw6VFNduT5qqzY1K62t4zxVHRML4/7haJ7aJ guDPC6Yr+A+Fari2UqIushdA0Jyv+KjuI9t24N9v6J+HEF9MSQOd++ZrPzkqZxVICmFq EM3O2wOGoQwCqAed++jf3xj7bbhAwAZGU8hURDeVoxZIqwEVgNzWKls19CK6TUx2hm+/ OlgWstmtlFryuXynWRRMzcvFFsNuEf7usJPsn1eVDXaSb1fYJCZREX/ekq8TNzDYqKdP iDd3zrdSS6QRk4xQg+Qa5nglQVt7QCKfYpX2GgwQnsyDcYwQ5iv1aWtdjpyQ6iVMZC9j gzbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721268693; x=1721873493; 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=SigXo9JFKeTNramL+H42np6aFUN6W3LsbIdms9vmOc4=; b=nBT3VSj1z/Lf8qpHEv9HfUTTlChoAECl17QnTGnO7OTlPNBYN/e9YDSsRKUMbhFiQB ioKYRfjRPfQqviqYY+joKHe32aPgCXgq1S8p6MGxOqNz/hFIj6slrXQCBNvzM1+OWsbh m4Dk4jphGKatCXnt6HsLOJmj2e807jwn/M5A0qGBnhKHYuMvoFpfFOLMJrb8AWMntXLf Q5XxXglH3PspYYT8/Usoi+Rr+cLcYokUGj7KHEDuUms5OS8j/mji2jcIuTyiPnkTvhqJ XzxWeQH7ECN1CHvvDtPh7ik8emkJlFJ+vrnMjZr/Smb+l+Zw+rcpNM0jzXpu90uW5viM GvWg== X-Gm-Message-State: AOJu0YxLd3bF/kCBQkOQ8rFM2fCU9yGnicY55e8GaQslb0yxhW5YcbT7 YDwv6it/hq2D+gMsu22BDjZv7c0IgI/6TL7t+IzDUVd8D3oqAndl8bUfE1nw X-Google-Smtp-Source: AGHT+IHfHZfqY9K/uWj8mAqvwMsqKQquLAGwJflCLd9IhMfUuIFBrGVhQE0JcZcUJ2t7384vMzA/mA== X-Received: by 2002:a17:902:f651:b0:1fb:9cb0:3e46 with SMTP id d9443c01a7336-1fc5b5dd433mr24532875ad.7.1721268692755; Wed, 17 Jul 2024 19:11:32 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Atish Patra , Daniel Henrique Barboza , Alistair Francis Subject: [PULL 23/30] target/riscv: Enforce WARL behavior for scounteren/hcounteren Date: Thu, 18 Jul 2024 12:10:05 +1000 Message-ID: <20240718021012.2057986-24-alistair.francis@wdc.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240718021012.2057986-1-alistair.francis@wdc.com> References: <20240718021012.2057986-1-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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=alistair23@gmail.com; helo=mail-pl1-x632.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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1721268798108116300 Content-Type: text/plain; charset="utf-8" From: Atish Patra scounteren/hcountern are also WARL registers similar to mcountern. Only set the bits for the available counters during the write to preserve the WARL behavior. Signed-off-by: Atish Patra Reviewed-by: Daniel Henrique Barboza Reviewed-by: Alistair Francis Message-ID: <20240711-smcntrpmf_v7-v8-9-b7c38ae7b263@rivosinc.com> Signed-off-by: Alistair Francis --- target/riscv/csr.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index b7a24f9c60..d6c5b73afd 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -3063,7 +3063,11 @@ static RISCVException read_scounteren(CPURISCVState = *env, int csrno, static RISCVException write_scounteren(CPURISCVState *env, int csrno, target_ulong val) { - env->scounteren =3D val; + RISCVCPU *cpu =3D env_archcpu(env); + + /* WARL register - disable unavailable counters */ + env->scounteren =3D val & (cpu->pmu_avail_ctrs | COUNTEREN_CY | COUNTE= REN_TM | + COUNTEREN_IR); return RISCV_EXCP_NONE; } =20 @@ -3722,7 +3726,11 @@ static RISCVException read_hcounteren(CPURISCVState = *env, int csrno, static RISCVException write_hcounteren(CPURISCVState *env, int csrno, target_ulong val) { - env->hcounteren =3D val; + RISCVCPU *cpu =3D env_archcpu(env); + + /* WARL register - disable unavailable counters */ + env->hcounteren =3D val & (cpu->pmu_avail_ctrs | COUNTEREN_CY | COUNTE= REN_TM | + COUNTEREN_IR); return RISCV_EXCP_NONE; } =20 --=20 2.45.2