From nobody Mon Sep 8 12:35:05 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1756570109; cv=none; d=zohomail.com; s=zohoarc; b=MyOScTR+vN/qra4XBJub30btIuIvQ7IUQgUFnIiV5vJR3rmwXHnFDTBHHJBVxXyBSvXeFBpZGlSrYEh5/f3x216TfM5iVXg+cumwXfuyRDi81XaVkx/0WMa4L2AGyNMnd6wwTOibryGbWeDtLJz7cPs1mtyBfXZQrEgtgexwVkQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1756570109; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=QZLKbvaJXmVjJqae0cs73+DMl1qe751GQQY47wH+UJk=; b=KnYvafD/8mO7yHfTlIYwOdLoHoIVhbz3DQjD0OG1agaxp09vQMJ6Q/9jPGRGxBbIyyvoA3CR1fR4ZYUE+i60Am1PiqzqT4/Pnkdmdr6hKiCruifd2GduVgBj9axF0JjSFDMFyFU9nUfMr9GHNiiIr1dv2zIsktvC3n2U6fYJrxc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 175657010939971.63909361845629; Sat, 30 Aug 2025 09:08:29 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1usNxr-0005ew-9w; Sat, 30 Aug 2025 11:58:04 -0400 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 1usEQb-0007Fc-Vp for qemu-devel@nongnu.org; Sat, 30 Aug 2025 01:47:08 -0400 Received: from mail-pg1-x52c.google.com ([2607:f8b0:4864:20::52c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1usEQW-0004qW-6C for qemu-devel@nongnu.org; Sat, 30 Aug 2025 01:47:01 -0400 Received: by mail-pg1-x52c.google.com with SMTP id 41be03b00d2f7-b4e84a61055so71317a12.0 for ; Fri, 29 Aug 2025 22:46:56 -0700 (PDT) Received: from stoup.. (122-150-204-179.dyn.ip.vocus.au. [122.150.204.179]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2490658999fsm40852715ad.112.2025.08.29.22.46.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Aug 2025 22:46:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1756532815; x=1757137615; 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=QZLKbvaJXmVjJqae0cs73+DMl1qe751GQQY47wH+UJk=; b=P+ZCJQ7Z/vqqrN502oeGR6ivwkU1B5RlwzwD8B3NJUpcG2wYOx9k9SHifJ47CYuhXb +yA1fcY6tlUn5oobF+Z21Qac8DtmShekzYZXus+Br3hK2dHRuyO0ThsbuEFQJSIXopkx BqwhOBPNxPUdVOBoLw99BOou5H8prNOMElp+mhqSVqEh1JfkvHxPNosRs5oYPwkNdfBd dz5s8vvcur8xaP2A1x0fDC5ImhTld5Omy7/DVCZgOvgf1Sv7S6z8ZtyUBEaJBBl6OlM8 xqPWxkszoPWv73CGTVIAq9VT07vGH1H+n+L7hx9PLvxdJL90QVFjGcmM7sX/4BEuU24b /6Gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756532815; x=1757137615; 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=QZLKbvaJXmVjJqae0cs73+DMl1qe751GQQY47wH+UJk=; b=l2b0DJNCevnGMzHZHUn2Zsb8ugXIER59PKX+iTTk+9iY6JEkfosi9wgNhiBTEJt3Xx xPST98YiVZ8Bycc7dGyNV5E1WIpJ1U6fFoRZ47I9iz4y8aKjT0L0Ea8DDB0q7QT0io76 CDK4Gvc59BNNd42plpakftxa73m9qI9rL6fFu7PGRpT0TBnOnX3FDwL5MVMyKqoIpATZ gob7nO806zW/jQXJYWgqHQtjqKabNJ+NoE7uqj6AGME9OLPDkjJj+Xgvhw9P9AWzTqxO CQt+wlqcnowEi5oRgleVxu261leV4LH7qe6Cbh6SMoM3vW41qQLh8C0Q/OPsSkyVJAFW nteA== X-Gm-Message-State: AOJu0Yxf0Hy1J6bB7+iSaE6F1wkXwyPJXJBVgOZ1Xj3L5HCnnuR9li16 Y7NOOYuHniSAWTDoRy128b/gLlfilSW2uO0jXHpB5Euz005HPKBKTuxBIkOoWaOg7bxanF4KNth NGmNWHS0= X-Gm-Gg: ASbGncs6v8fN4vq5KzLVyYg0GdO1EIQYybWc8ZleVWe7c8tuxAHAiOG8uBc+yiK8ob/ zEekmdrOuxOjw2ttNMiaNUVKW0Ga8Ou37quiLvi8GZf/wKvY+5kz+t6Wy6xsJJtVp0umiUWetZz /Hh7bu7jD9jpOqQOlGpKjdTDATA1v0MnL9vRsA+5mU8NHBrt/Qdkk0/N3iVhckr6rP9htaEiG+a ZNLU6/m6/btEIgXHuaY+4/d4SlIqA/aJGd7qitfTnLD4kZmiOiaH3bZ8bC6mH2yGpHkDLv8GVCK VgBRBw/Y8+rCC6nwiOG4zB7UVViKY7A0h7felb9tihsm/TccgiMa6JmPBfhIy3DBmFdniKlLAaV NEv92DmcpVjm0xfRdZRKQetUsHhjF7kGB4S1d7egiAlQTzA/FRbCeTtLFtZRr+sY= X-Google-Smtp-Source: AGHT+IEVNvqMG3+DGDs3rlePUboNFtyM1HZa+e+tI8fBAMOBtmtGPrJV9lbaPkeGHnRlWk3fPMNvqA== X-Received: by 2002:a17:903:1250:b0:249:1234:9f7c with SMTP id d9443c01a7336-24944b23caamr15133335ad.60.1756532815345; Fri, 29 Aug 2025 22:46:55 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Gustavo Romero , Pierrick Bouvier Subject: [PATCH v4 49/84] target/arm: Implement FEAT_CHK Date: Sat, 30 Aug 2025 15:40:53 +1000 Message-ID: <20250830054128.448363-50-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250830054128.448363-1-richard.henderson@linaro.org> References: <20250830054128.448363-1-richard.henderson@linaro.org> 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::52c; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52c.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 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 @linaro.org) X-ZM-MESSAGEID: 1756570111283116600 Content-Type: text/plain; charset="utf-8" This feature contains only the CHKFEAT instruction. It has no ID enable, being back-allocated into the hint nop space. Reviewed-by: Gustavo Romero Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- target/arm/tcg/translate-a64.c | 14 ++++++++++++++ docs/system/arm/emulation.rst | 1 + target/arm/tcg/a64.decode | 1 + 3 files changed, 16 insertions(+) diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index 4139b0345f..8c73f54e9a 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -2124,6 +2124,20 @@ static bool trans_AUTIBSP(DisasContext *s, arg_AUTIB= SP *a) return true; } =20 +static bool trans_CHKFEAT(DisasContext *s, arg_CHKFEAT *a) +{ + uint64_t feat_en =3D 0; + + if (s->gcs_en) { + feat_en |=3D 1 << 0; + } + if (feat_en) { + TCGv_i64 x16 =3D cpu_reg(s, 16); + tcg_gen_andi_i64(x16, x16, ~feat_en); + } + return true; +} + static bool trans_CLREX(DisasContext *s, arg_CLREX *a) { tcg_gen_movi_i64(cpu_exclusive_addr, -1); diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst index 94a6192fa9..4b07af9eac 100644 --- a/docs/system/arm/emulation.rst +++ b/docs/system/arm/emulation.rst @@ -28,6 +28,7 @@ the following architecture extensions: - FEAT_BF16 (AArch64 BFloat16 instructions) - FEAT_BTI (Branch Target Identification) - FEAT_CCIDX (Extended cache index) +- FEAT_CHK (Check Feature Status) - FEAT_CMOW (Control for cache maintenance permission) - FEAT_CRC32 (CRC32 instructions) - FEAT_Crypto (Cryptographic Extension) diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode index 55ff6c504f..8283a9c83d 100644 --- a/target/arm/tcg/a64.decode +++ b/target/arm/tcg/a64.decode @@ -256,6 +256,7 @@ ERETA 1101011 0100 11111 00001 m:1 11111 1111= 1 &reta # ERETAA, ERETAB AUTIASP 1101 0101 0000 0011 0010 0011 101 11111 AUTIBZ 1101 0101 0000 0011 0010 0011 110 11111 AUTIBSP 1101 0101 0000 0011 0010 0011 111 11111 + CHKFEAT 1101 0101 0000 0011 0010 0101 000 11111 ] # The canonical NOP has CRm =3D=3D op2 =3D=3D 0, but all of the space # that isn't specifically allocated to an instruction must NOP --=20 2.43.0