From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8D7D1F3B8C for ; Tue, 4 Mar 2025 05:40:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741066810; cv=none; b=M/YRIixNkfAiF2CYWTXFsWPF2MxgPBznb6tB6TPFgta6tlCo+lvpeNn8Cgw2zOessGgutpWWdPDyWqOzHbAddCF3ko2ngHzR5ydyt29snxAyvJTPcxZNYPZ5fs5y3v9A7+bnetVwE/+xBZ0EWZ53trxVHoQD4nKPvzJ2536/a4g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741066810; c=relaxed/simple; bh=m1IRZ6JWrGXWz0hUht2VZ4u/oJafs19LSlUBPTVVrj0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jHpOAt6OxXeZxbyh1VobX1aU+d8TZWCyM+8raadhvtAzvV5kc1GIHqmOz6o6ewCm5/P3U1NPLzEcRx3QKmvvR4lvUbAzMQ7f5Tk+09cy6ThQoQLh+AyeQoCflOny0/O4c1+Bc1itKGctLDooSrldRgQkfjgcMOJPco8jLdeGu5c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=S8kOvKuk; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="S8kOvKuk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741066807; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lnsiIq7MCp7MkWvaBWDURZ2QmGy76WgJakR0X9oQlAA=; b=S8kOvKukWKvBtYXvW+Dgt7doRhe82PkpzuCMFZAaIgNyUxJOAwcw3LReUmAA2+gLNMpMW9 S+r3GJSydQfiCcflw3yGyD9R2WehIbHEGqRHdK4dG5pFhJUFPprvvTowmhLtQtfAssbdg7 VdbKBe5brrKobSPf45T/rqQJStQjLvs= Received: from mail-pj1-f69.google.com (mail-pj1-f69.google.com [209.85.216.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-515-RJZFW1X9NdKRvviAxTNn_A-1; Tue, 04 Mar 2025 00:40:01 -0500 X-MC-Unique: RJZFW1X9NdKRvviAxTNn_A-1 X-Mimecast-MFC-AGG-ID: RJZFW1X9NdKRvviAxTNn_A_1741066800 Received: by mail-pj1-f69.google.com with SMTP id 98e67ed59e1d1-2feb5cd04a0so8201594a91.2 for ; Mon, 03 Mar 2025 21:40:01 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741066800; x=1741671600; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=lnsiIq7MCp7MkWvaBWDURZ2QmGy76WgJakR0X9oQlAA=; b=dfslAycd6unW1KAQln9AjjwwlFozYGEZ6Sk07w6xxhRFv5ZqWWg9o5yJUDqNP7cpXo JnUQ/QerPS064OaDtHzvRsR2UxW1xuog2JKA5TXpr2aISZyRyl7oHTyejWLGxplX/L23 5syF9eP159vCLc6acrA9C/RePVZ3ML4mA8Rqj6ffnimkFHT52nT1HvnlLFmP9VzhUVHZ 7MW+okax72Yf8PAC8wl5kha3udGyO2KVMpBCFoMg1fUnb/P0aQoFTf6BKUABjWkl3ptl ghRd1LsrCnL4gBgpaq3ODJS5lNDFDQbkX+/q3EdBl5ME800x0NQSfJxYsRs9U3uaKdeW IWFQ== X-Forwarded-Encrypted: i=1; AJvYcCUlI22f0siypKxnQQpdubzpFq9xV450RS+j7+sf38rA0qITzosssYlgyEtcSkwAlKzvAAXSZrHj9k+4ANw=@vger.kernel.org X-Gm-Message-State: AOJu0YwTFOwICneJOSmOfJ17mvW7tOfrAJKcXqF3c0AfHJNQ7GcjSrqz qUZP8tztyqkBN2ILh9BgDasm8vCNpDiRWyVa+CJDR/QEYAVVgUxXsQitakDAVTnaoSDx0zzT8c+ jZlOsKH7mvcgqjRHbEl8n6QNq29qUQpuULLckLVZa/eL60lbgk9SPwefDpBZ+PQ== X-Gm-Gg: ASbGnctlNYMvZ77NvCYGNScBJ5kn6cszTYmokVK7ISFaNgr/JvkA0Td6KxQyMQ7dsVI p41y7ehd/0aum9I71kRZhSC+pyOypyQ8WfK3b0fut98C/USsXQgJ05T+bgz9OflK7sKi1MpuOdw 5r6O7pI45FRi761iz3j/IXA2Y0+XMlGrfg8V9VL3NUH/tPBTEFquz+4YTy8h8AY6bslzuNFTvlA 82Nx/asL1d9SwsLj7oCMzGN1v9Z9xazMJjwH5tM+6hrNuSL1LgYJxdLo7Jjrn6SmNL3QD3HFNPf sH5ARJ830YI9jbifuw== X-Received: by 2002:a05:6a00:1e0f:b0:736:41ec:aaad with SMTP id d2e1a72fcca58-73641ecaf3cmr9917215b3a.14.1741066800346; Mon, 03 Mar 2025 21:40:00 -0800 (PST) X-Google-Smtp-Source: AGHT+IGLv+2IvaT9lpwd7y3NyeB6C4SRMHYy3586SBjSpdbcGPeX0DUdvbJ57X14h7Gm8kD4TRZ84g== X-Received: by 2002:a05:6a00:1e0f:b0:736:41ec:aaad with SMTP id d2e1a72fcca58-73641ecaf3cmr9917181b3a.14.1741066799979; Mon, 03 Mar 2025 21:39:59 -0800 (PST) Received: from [192.168.68.55] ([180.233.125.164]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7365bb4090csm2607097b3a.35.2025.03.03.21.39.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Mar 2025 21:39:59 -0800 (PST) Message-ID: Date: Tue, 4 Mar 2025 15:39:51 +1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 25/45] KVM: arm64: WARN on injected undef exceptions To: Steven Price , kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" References: <20250213161426.102987-1-steven.price@arm.com> <20250213161426.102987-26-steven.price@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250213161426.102987-26-steven.price@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2/14/25 2:14 AM, Steven Price wrote: > The RMM doesn't allow injection of a undefined exception into a realm > guest. Add a WARN to catch if this ever happens. > > Signed-off-by: Steven Price > --- > Changes since v6: > * if (x) WARN(1, ...) makes no sense, just WARN(x, ...)! > --- > arch/arm64/kvm/inject_fault.c | 1 + > 1 file changed, 1 insertion(+) > Reviewed-by: Gavin Shan