From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-172.mta0.migadu.com (out-172.mta0.migadu.com [91.218.175.172]) (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 DF9B010F2 for ; Tue, 3 Dec 2024 01:20:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733188808; cv=none; b=Wi+uFhMfZcK/+xKoihJWQiLSJiEEwU7EgCLG/kLyQW2hg3+Oco7MXgcIkh+oGbciiIrhEwZDChWlqjizqrFrrAaIjI4LBvii3Ijr5rcK9vZkKuDESIqlB95+vtF+guOZCoetEgWuEB5psGtZtiSSwpbKmVEV4ICpg+FpL4dTD00= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733188808; c=relaxed/simple; bh=4Ra7lJoBgJ2Yvzcalw2O2mV6cgfk9TtUsa05GESd904=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=SOc1mW/mzEOqhZ/f0dFs9xAkPg4KBNzIgHwLR8nc/NjbdJc9uFRpOuzhypfPTMwtts58bLRD7+yOmn0F23wCSBoFSmi0BMQpQghYdEhL5zhwgve9XVzpg0oCIyedhJdhbylPj7bLNR1MuFZk+nAEK447au8pXua4RWRxg/Z+Z8w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=SEPcGcz1; arc=none smtp.client-ip=91.218.175.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="SEPcGcz1" Date: Mon, 2 Dec 2024 17:19:54 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1733188800; 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: in-reply-to:in-reply-to:references:references; bh=G7tKWX1j0TJc1AZqeUpwVF9dIXqKxSoumxFecXZ6Pkk=; b=SEPcGcz1mSLl64Ld90WUSVmBIm4CdmjhLZaoqZ2AkGy6JQVaGDxUN9hZerEjBSl0dvpU4d kz0tYnceZbgEMGGOeJ7C55bjisVbgrxJKbcYHbAMkMJ2PY3RcYxCH5+DfEIJzD2ietZ9aX I/l43pcPt82s44XSi10PPdtVB8kMZ6k= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: Vitaly Chikunov Cc: Marc Zyngier , Will Deacon , james.morse@arm.com, linux-arm-kernel@lists.infradead.org, Catalin Marinas , linux-kernel@vger.kernel.org, mark.rutland@arm.com Subject: Re: v6.13-rc1: Internal error: Oops - Undefined instruction: 0000000002000000 [#1] SMP Message-ID: References: <20241202045830.e4yy3nkvxtzaybxk@altlinux.org> <20241202153618.GA6834@willie-the-truck> <86ttbmt71k.wl-maz@kernel.org> <20241202155940.p267a3tz5ypj4sog@altlinux.org> <86ser6t6fs.wl-maz@kernel.org> <20241202223119.k3uod4ksnlf7gqh2@altlinux.org> 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=us-ascii Content-Disposition: inline In-Reply-To: <20241202223119.k3uod4ksnlf7gqh2@altlinux.org> X-Migadu-Flow: FLOW_OUT On Tue, Dec 03, 2024 at 01:31:19AM +0300, Vitaly Chikunov wrote: > Marc, > > On Mon, Dec 02, 2024 at 04:07:03PM +0000, Marc Zyngier wrote: > > On Mon, 02 Dec 2024 15:59:40 +0000, > > Vitaly Chikunov wrote: > > > > > > Marc, > > > > > > On Mon, Dec 02, 2024 at 03:53:59PM +0000, Marc Zyngier wrote: > > > > > > > > What the log doesn't say is what the host is. Is it 6.13-rc1 as well? > > > > > > No, host is 6.6.60. > > > > Right. I wouldn't be surprised if: > > > > - this v6.6 kernel doesn't hide the MPAM feature as it should (and > > that's proably something we should backport) > > How to confirm this? Currently I cannot find any (case-insensitive) > "MPAM" files in /sys, nor mpam string in /proc/cpuinfo, nor MPAM strings > in `strace -v` (as it decodes some KVM ioctls) of qemu process. If you can attach to the QEMU gdbstub of the VM, info registers will dump ~everything. If the value of ID_AA64PFR0_EL1.MPAM (bits 43:40) is nonzero then the host KVM is erroneously advertising MPAM to the guest. -- Thanks, Oliver