From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4657F17BBF; Mon, 2 Jun 2025 15:38:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748878725; cv=none; b=GcnoS5J1FeGQ09YOBAHhD7pHF6+XwQU/5GyGnA49CktESCS0W/UVQLPczayE64D4T9KF0Md4wSEuFxG6UCSKrbebr2O7uoGz5xFqXZ1AVMurXW95C6AinIOSoD+RiTfsOhOYes2I+3EzXPm6N9giY8c94Ce0quXZFikjApxKeEY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748878725; c=relaxed/simple; bh=IJDZ1hQCAOyA73sAOdBWo1+XIgrBqdEcKZf5fgDiopo=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=BK9J739M3d/107D33nu7wwM+Z0kSUQK6pcL43Lu6KhHfvBZp1Y4me8k1yDRMDt2ziuhXWzHny2OmEf+daAVpKB7CtbQR41MHVdBYbvC5RWznnU8pILrhtvuFzyHPjXMV191/hSKuBMEWnKWJlr7xX91jV1tkWcm05MpC4Qenp+A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d0faTVcy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="d0faTVcy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7FA0C4CEEB; Mon, 2 Jun 2025 15:38:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748878723; bh=IJDZ1hQCAOyA73sAOdBWo1+XIgrBqdEcKZf5fgDiopo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=d0faTVcyXEz4vhADLUaC8q8EBcHEKbkJYBvXw+PQPFVOKkkes3fH44eIk+v7sQ1v5 zs0hTpfSD0eslB8w2jU5jZeR0bFsOHghqd0rhcyoZziF+T2mH4vejqwks8pKW+1FNu f4gHIRcpYrgQFme3Tk/3dFZ//1kCZILHRiJF4kuDzcJ3bflodWQihx7GxwMZg7Ry/f TWOYBDkSIVHOs4KNi91Bopy0Zw9aKSY1mF4GTRR9vHrVDfyl0PqT/a8Ghz9RQcG1xz Qd5BlQDWb6c8Q39xnO7ruR9YcY3oO9GaZCYxSWzz+keJyZkvl9Gr8FRYvN1Vd1Ms1t 7iV0dXDl/kEQg== Received: from [149.88.19.236] (helo=lobster-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1uM7FI-002WrR-Vh; Mon, 02 Jun 2025 16:38:41 +0100 Date: Mon, 02 Jun 2025 16:38:38 +0100 Message-ID: <87msaqdugx.wl-maz@kernel.org> From: Marc Zyngier To: Itaru Kitayama Cc: Ganapatrao Kulkarni , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, seanjc@google.com, darren@os.amperecomputing.com Subject: Re: [RFC PATCH v2 8/9] KVM: selftests: arm64: Extend kvm_page_table_test to run guest code in vEL2 In-Reply-To: References: <20250512105251.577874-1-gankulkarni@os.amperecomputing.com> <20250512105251.577874-9-gankulkarni@os.amperecomputing.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 149.88.19.236 X-SA-Exim-Rcpt-To: itaru.kitayama@linux.dev, gankulkarni@os.amperecomputing.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, seanjc@google.com, darren@os.amperecomputing.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Mon, 02 Jun 2025 07:04:07 +0100, Itaru Kitayama wrote: > > On Mon, May 12, 2025 at 03:52:50AM -0700, Ganapatrao Kulkarni wrote: > > Adding code to run guest_code in vEL2. > > NV is enabled using command line argument and it is disabled by default. > > > > NV is only enabled on ARM64, for other architectures the test will exit > > with an ASSERT, if tried to run with NV enabled. > > > > I'm seeing this in QEMU TCG mode, does this mean the limitation of the > emulation? > > $ sudo /mnt/projects/linux/tools/testing/selftests/kvm/arm64/page_fault_test -m 3 -s anonymous > Random seed: 0x6b8b4567 > ==== Test Assertion Failure ==== > arm64/page_fault_test.c:632: test->expected_events.uffd_faults == events.uffd_faults > pid=769 tid=769 errno=9 - Bad file descriptor > 1 0x000000000040325b: check_event_counts at page_fault_test.c:632 > 2 (inlined by) run_test at page_fault_test.c:739 > 3 0x0000000000403cbf: for_each_guest_mode at guest_modes.c:96 > 4 0x0000000000401cfb: for_each_test_and_guest_mode at page_fault_test.c:1107 > 5 (inlined by) main at page_fault_test.c:1133 > 6 0x0000ffff848122db: ?? ??:0 > 7 0x0000ffff848123bb: ?? ??:0 > 8 0x0000000000401def: _start at ??:? > 0x2 != 0x1 (test->expected_events.uffd_faults != events.uffd_faults) Unlikely. This could be a bug in the test, in KVM, or most likely both. You will have to investigate, I'm afraid. M. -- Jazz isn't dead. It just smells funny.