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[92.145.124.62]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-368727f1d61sm4377f8f.54.2024.07.18.09.07.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Jul 2024 09:07:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1721318861; x=1721923661; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=9nAbe/02zA9mz1wYH+8wmMjMKPwaYzPtSWtf+2dkuv8=; b=GoST5e69kPK86pvfcFq/gajwZyQEHjgitjpy9Y3sWQjgow/T2GMGuafwUKcZv4BgUj 4c+pMDsbYm37RnOLOHcYZMp/s7lMa+mvjRmtrAnGMNyZCOpvilFChX29D3TElU1czIY4 I1KutUT4L3JTXKPOHj/kp6i3YUsbRxyivT7N/GAFts4DO2qZFFFB/fEek65a8xm2g8zY Z6dZRaseTe0R0bdYoQAUcyVlpM7ya0H6p9IukbrUV3Nui/PpdlLcjOOzZOP7mSqGTrcs dZUBwF/ws1q9we3wH0SK+WsXI6y8xKBHXJArYoq6MPlVY70DBU54tawlXGqbYBtWtsKL Vg1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721318861; x=1721923661; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=9nAbe/02zA9mz1wYH+8wmMjMKPwaYzPtSWtf+2dkuv8=; b=epEQBwOphVWdSft+52BEhcE/Djr/JFoLvJ0H2MlQiFEhzKp6kg2b5c6KM54eBW08WZ 1b3U/IDcRtB2dcIkhq0LeQSY7zbIEN3o/PC72MqwiJz+caH97nboF6iu/6fTEfHJx8mf tiJlnN34x2nNcpGpmxSjEZOMk1sW/3uQ+eIXg88cIZNRp0cDVFfOGsGPuMn9Ye7yIB7a NpltMmFdaERbmjmL/eTiJ4mqrsDiNvP3G4UlIxlBzH+Fz6xgGfQA6j+thhqn0MBD/k2B l0fAGzlxv081j5oCmqWHjNQlu5eOuVVVzoPz4m/Vz/NfyXTb208Jdf/AGPl5TYdtZ4C3 BZXQ== X-Forwarded-Encrypted: i=1; AJvYcCV4XyRxczche6Ma0PaZ4vCXEcL/14ZTQb0TXxVZqqp6sMED4RiMINhC1jrgbhvQQ6HH1trRuLTcS1/u3ormGzWUgEBfILw= X-Gm-Message-State: AOJu0YxSos95VugFLFzwF0CxlpRI26nfAzjFlf5mFfwP3y2IMd1wJahQ PR8I+uyPD18BQXa2hwA16494dN93wA6I8hvKhxLfENGhjRnHjhVpbSNxp7kKI+s= X-Google-Smtp-Source: AGHT+IHWkYUPYJO3hf5o4Dtt5vr2cpazEtJff75gHVbv1MeThDBmyW9PmbbEUc4IykzX8StdWpoTqA== X-Received: by 2002:a5d:47a2:0:b0:368:6f64:3072 with SMTP id ffacd0b85a97d-3686f643190mr368146f8f.7.1721318860939; Thu, 18 Jul 2024 09:07:40 -0700 (PDT) From: Alexandre Ghiti To: Palmer Dabbelt , Alistair Francis , Bin Meng , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: Alexandre Ghiti Subject: [PATCH v2] target: riscv: Add Svvptc extension support Date: Thu, 18 Jul 2024 18:07:37 +0200 Message-Id: <20240718160737.211285-1-alexghiti@rivosinc.com> X-Mailer: git-send-email 2.39.2 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=2a00:1450:4864:20::436; envelope-from=alexghiti@rivosinc.com; helo=mail-wr1-x436.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 @rivosinc-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1721318935800116300 Content-Type: text/plain; charset="utf-8" The Svvptc extension describes a uarch that does not cache invalid TLB entries: that's the case for qemu so there is nothing particular to implement other than the introduction of this extension. Since qemu already exposes Svvptc behaviour, let's enable it by default since it allows to drastically reduce the number of sfence.vma emitted by S-mode. Signed-off-by: Alexandre Ghiti --- Changes in v2: - Rebase on top of master - Enable Svvptc by default target/riscv/cpu.c | 2 ++ target/riscv/cpu_cfg.h | 1 + 2 files changed, 3 insertions(+) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index c53b0d5b40..19421c8a45 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -192,6 +192,7 @@ const RISCVIsaExtData isa_edata_arr[] =3D { ISA_EXT_DATA_ENTRY(svinval, PRIV_VERSION_1_12_0, ext_svinval), ISA_EXT_DATA_ENTRY(svnapot, PRIV_VERSION_1_12_0, ext_svnapot), ISA_EXT_DATA_ENTRY(svpbmt, PRIV_VERSION_1_12_0, ext_svpbmt), + ISA_EXT_DATA_ENTRY(svvptc, PRIV_VERSION_1_12_0, ext_svvptc), ISA_EXT_DATA_ENTRY(xtheadba, PRIV_VERSION_1_11_0, ext_xtheadba), ISA_EXT_DATA_ENTRY(xtheadbb, PRIV_VERSION_1_11_0, ext_xtheadbb), ISA_EXT_DATA_ENTRY(xtheadbs, PRIV_VERSION_1_11_0, ext_xtheadbs), @@ -1499,6 +1500,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = =3D { MULTI_EXT_CFG_BOOL("svinval", ext_svinval, false), MULTI_EXT_CFG_BOOL("svnapot", ext_svnapot, false), MULTI_EXT_CFG_BOOL("svpbmt", ext_svpbmt, false), + MULTI_EXT_CFG_BOOL("svvptc", ext_svvptc, true), =20 MULTI_EXT_CFG_BOOL("zicntr", ext_zicntr, true), MULTI_EXT_CFG_BOOL("zihpm", ext_zihpm, true), diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index fb7eebde52..62612ae348 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -78,6 +78,7 @@ struct RISCVCPUConfig { bool ext_svinval; bool ext_svnapot; bool ext_svpbmt; + bool ext_svvptc; bool ext_zdinx; bool ext_zaamo; bool ext_zacas; --=20 2.39.2