From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f41.google.com (mail-wr1-f41.google.com [209.85.221.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D3C2286A1 for ; Fri, 23 May 2025 13:05:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748005559; cv=none; b=puuQolDXk21OnfkBlxu68M5F+pD+EUCX+CHaYEtd4kesPYRj/xuVlk3Tyz7KqB3hbPD3vf9R1M7QGtoZO3D38xAy1pl7Fl/VKE283OG/6G7adL7MDPripbiPucU64SUkuwoOOK8AwZYEJgk3sYcSOyw0O+KW4fVNSt+Q+hD1R98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748005559; c=relaxed/simple; bh=xcdAazkrufWuzaju7No3ced2/sH583+qifVFJh+ynvw=; h=Mime-Version:Content-Type:Date:Message-Id:Subject:Cc:To:From: References:In-Reply-To; b=Z2vzQ1wdJvQxvfiW1+GzdfoD4rgC/a40J/twUZd+CVWktnSJoGZU3S5ctbdI5yYBr6OzosVecKGyj6V08DvdzoS0uviK1x8cbpT3G0E0Zw6mpviu4sHf7JVGOw9tbrEGmA6Cvuc7lMSNV7NITuz1O+DsdfvnJBiarTeLDloI71A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=mOZoM7C6; arc=none smtp.client-ip=209.85.221.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="mOZoM7C6" Received: by mail-wr1-f41.google.com with SMTP id ffacd0b85a97d-3a367226ad2so709208f8f.0 for ; Fri, 23 May 2025 06:05:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1748005556; x=1748610356; darn=vger.kernel.org; h=in-reply-to:references:from:to:cc:subject:message-id:date :content-transfer-encoding:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=gFewfZjNIOlnKjbSqghMjET5KPXnaKP3RNtWcft+NNM=; b=mOZoM7C6z57lpCL4aUH3bkfyDirbWMGziUkqBUGZNEmBdfhrSVnKTutiuzGlefah5u 1FACWiwN6mjq5orq25WvIFHmes4LOUGwBVQXhe+Ri+e7BG+ToZIbYg862ajC4xo7vFsG 67TUV2ek5whv0r4Ul28LxmFXXJIgmwW+pSJu+RbeRGtCUI/TnJ+TZ41DGyEv8f6avqOW kiw5AhtyVDHhQtfXVhzvc6zEP9kEum2GPVLICFXNq9+dpWXwQMMFBamMa14qEL3Nck2g +B6oneJmhRji4i1WWSRzX8o6P9HimpoHC8xTzTjOHzTbv3RdTagJ5SAZUB1aO8uogpaa YaYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748005556; x=1748610356; h=in-reply-to:references:from:to:cc:subject:message-id:date :content-transfer-encoding:mime-version:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=gFewfZjNIOlnKjbSqghMjET5KPXnaKP3RNtWcft+NNM=; b=tNj6HBbFU5GDRsrXd9JYy2GapcH9nfKYQ/jmbP3K8jva7M/YiOhgmukkNWuAaIFdJD K3YleK9u0WohvN/ZQLwBKHfHw0W5zfs2hAEMZK7V9wJh6wwYQpbh/ZfShwNcy+Y0OxEw cqpopcMDA9vztIAyIiiBwNWGe8/IVqtr2y+fS9KBO98E2khzQ+tSdlCX2YvGVw6uPqiW 0okseEDUZOTsXQbhXCgjDw+OXj6CKgvpUfr/MCXvyVAu9dQ5zECsc16uO/7ibfgpAQ1/ b1NmT3+RDwm5sJDVJPsXdlbFYCNaG88XTDsX4OtMFPb838j4jPUdqhCGVGlPAttikB5F 7mJA== X-Forwarded-Encrypted: i=1; AJvYcCVfly0e7NUSN46iER0Zqs8iVVFDUQJaBuxw8KxL9O42B35Ysny7rj5FnzLCKsemX+ExpptY9IpqNEyYAtk=@vger.kernel.org X-Gm-Message-State: AOJu0YxecZBDGtud4PuzHruBWAl5tpK2aOaQoDP1Ot4HKJxr4LJ3CnfS liPMbUDKe5TOvdMcGQku8WJB13eqVDtWWEXfqsKxFSMsoboWj5JyZPZ5QswIx2efIAE= X-Gm-Gg: ASbGncvRfbhKa6CwLFuvAk5f6fWfGRfsY3UbwHcUlCnPqRNvTg5h2j/VHbdXBB3VvwW aNfVtCAamvOzkrGVsYxpaWhguE3TRWNl8R6Hk1RlPeMQXWN1cOxA2PC3uaegHzILj6FFfAt3zZM 2VJiL+tZ5LVjyNziZLlRAmYAKor3J8AqOJbx+Fi3ON1p+T3TgoIs6q46LW69HvkYUzmWU51KDSu QaADBoxyE6/C+2/+xTk7CEkgsLMHU93iHKoNoq+DNzkDvCYrNAwfE4+tcWbMfEQEdtyXx5TeBGO UCZxbdwPR1RYygqcP6fUXnlSfJ9+HfyRYVLrBvV4RXYRZf/gABMl5WdpvHI= X-Google-Smtp-Source: AGHT+IEYIo39joB/0uuiMCLZj0X9kGxap7PQ8MzBUGOeMKLVyBYJHZJSgGJhoZMNlP15r1mU9RPZpQ== X-Received: by 2002:a05:6000:4285:b0:3a3:5c97:70c with SMTP id ffacd0b85a97d-3a4c2e5707cmr874240f8f.14.1748005555660; Fri, 23 May 2025 06:05:55 -0700 (PDT) Received: from localhost ([2a02:8308:a00c:e200:be84:d9ad:e5e6:f60b]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a35ca8899bsm26390515f8f.62.2025.05.23.06.05.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 May 2025 06:05:55 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Fri, 23 May 2025 15:05:54 +0200 Message-Id: Subject: Re: [PATCH v8 13/14] RISC-V: KVM: add support for FWFT SBI extension Cc: "Samuel Holland" , "Andrew Jones" , "Deepak Gupta" , "Charlie Jenkins" , "Atish Patra" , "linux-riscv" To: =?utf-8?q?Cl=C3=A9ment_L=C3=A9ger?= , "Paul Walmsley" , "Palmer Dabbelt" , "Anup Patel" , "Atish Patra" , "Shuah Khan" , "Jonathan Corbet" , , , , , , From: =?utf-8?q?Radim_Kr=C4=8Dm=C3=A1=C5=99?= References: <20250523101932.1594077-1-cleger@rivosinc.com> <20250523101932.1594077-14-cleger@rivosinc.com> In-Reply-To: <20250523101932.1594077-14-cleger@rivosinc.com> 2025-05-23T12:19:30+02:00, Cl=C3=A9ment L=C3=A9ger : > +++ b/arch/riscv/kvm/vcpu_sbi_fwft.c > +static const enum sbi_fwft_feature_t kvm_fwft_defined_features[] =3D { > + SBI_FWFT_MISALIGNED_EXC_DELEG, > + SBI_FWFT_LANDING_PAD, > + SBI_FWFT_SHADOW_STACK, > + SBI_FWFT_DOUBLE_TRAP, > + SBI_FWFT_PTE_AD_HW_UPDATING, > + SBI_FWFT_POINTER_MASKING_PMLEN, > +}; How will userspace control which subset of these features is allowed in the guest? (We can reuse the KVM SBI extension interface if we don't want to add a FWFT specific ONE_REG.) Thanks.