From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7C141494812; Tue, 15 Sep 2026 22:25:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789511148; cv=none; b=BdOTDYG9mv7Ctn+4u1QH01gdiUG7DSMYdTMkAWp3MKKy7/PAnLtRnE7fIRn/eTI6jOL82yvdcq7SlabUGkaqgrCu82i1NbLPhMuxrQfBd6/7JZKJbaAeFD74aLs37QjkF8vONCL9XtFGNTjTYEPZC1t2b8yPjhyxaFsuOIzCC00= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789511148; c=relaxed/simple; bh=gdQY3EMZEOfWheafQ/uuEwATT2U3LRWRuoQraGDoBoA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WC5mKBeaJIyED9TGrbq2/pE6Elc9YRCnA+uqRpF99Lw0TszY+MfZr0L9oz/kws+xbtB7sKNTF6vVlnhSUpCst2zFtp6RJ9hV9BohP9cKuaphx02IwWQlekaS7M3yM6l0DHWvkxAE6XSJMwKrv1K8qlE+ZRl+RTP8ZqR6PAWRad4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZWeWHJPu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZWeWHJPu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 005591F0089B; Tue, 15 Sep 2026 22:25:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789511147; bh=E/lBbhtTE2HQN9x+xVp3jc8ZwjbTlxs/8mbmhmvVWeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZWeWHJPumUljTcS9NiLuZBiYB9NAYMhX1qlg8GwqdgqQeB5XeqVmEScLsiOaJVtxe 6wAY6MOfFlgXKj2O59kPOKqw4cWF9Ci/27xm5YK35yYKdOsDWSFBMaFW8fCbV1Ohue F3u3Jd4MMs9Aiv8iAcDcocxC5y0gw3tH7jvtfzqj25GyM2BXQFBLSCdLqkSFkKs/91 EsK5ENL+IPqQSs9UUNxOwDDUM6X60fAMoJOsFvQOMf50gj0fQVIgqqxp/37xYLB0UJ c6g0eiGuKIjq5HIsHPGGDdM1ExwLYkAUIsOfgrVCJW/dulm/xzYhNcJX+aVYeIv6ck o22wrnObxKOCw== From: Oliver Upton To: Marc Zyngier , kvmarm@lists.linux.dev, Karl Mehltretter Cc: Oliver Upton , Fuad Tabba , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Mark Rutland , Paolo Bonzini , Sean Christopherson , Shuah Khan , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 0/2] KVM: arm64: Return -EINVAL for an empty SMCCC filter range at base 0 Date: Tue, 15 Sep 2026 15:25:37 -0700 Message-ID: <178951103699.10790.2965757289938875509.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260829054856.70549-1-kmehltretter@gmail.com> References: <20260829054856.70549-1-kmehltretter@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit On Sat, 29 Aug 2026 07:48:54 +0200, Karl Mehltretter wrote: > KVM_ARM_VM_SMCCC_FILTER rejects an empty range (nr_functions == 0) with > -EINVAL for every base except 0. kvm_smccc_set_filter() only rejects a > range if its inclusive end, base + nr_functions - 1, is below base; for > base 0 that end wraps to U32_MAX, and KVM then tries to insert > [0, U32_MAX], which overlaps the reserved Arm Architecture Calls > ranges, so the attribute returns -EEXIST instead of -EINVAL. > > [...] Applied to fixes, thanks! [1/2] KVM: arm64: Return -EINVAL for an empty SMCCC filter range at base 0 https://git.kernel.org/kvmarm/kvmarm/c/64dc6f1db7e6 [2/2] KVM: arm64: selftests: Test empty SMCCC filter range at base 0 https://git.kernel.org/kvmarm/kvmarm/c/0a46eb5719fa -- Best, Oliver