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 29F1629B0; Sat, 30 Nov 2024 02:44:25 +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=1732934666; cv=none; b=Ojsd9NPI0+vn8QzPl3VDUoAUyTL3ycUcv+uvzKDCiNtlLdF+VGUAvgoQiM+MQMnMs5fDVBYIKVFDYfofbLFEdj7sGx0ZJJCptcsz1JXMuJhDVNtbJLqbFF6RjVMb6PPasihZ2fUBU4ShghEGzSxFFoaGhrDvMWP6xIemQFwh+ws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732934666; c=relaxed/simple; bh=x07AbXnYtdGORKpShT3ofiSwhdl9R8Rkyj5bJS57toQ=; h=Mime-Version:Content-Type:Date:Message-Id:Cc:Subject:From:To: References:In-Reply-To; b=O7HmntDFREW/X3isWcIndhJxADUUx/5APV6/Q+UUubeEfEfnb4+phy/adwW42gRiwJ7heafKy6Sm60KaLK0xHFfrWexJfnqzWkrtREZgaKRiXIUV/ZX1MfDUkF+peRN8Yjc5luKLlHibSbUj5H3TmJ0yGdILvj+N6mlkNmJzmPQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aMlX06WB; 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="aMlX06WB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46163C4CED2; Sat, 30 Nov 2024 02:44:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732934665; bh=x07AbXnYtdGORKpShT3ofiSwhdl9R8Rkyj5bJS57toQ=; h=Date:Cc:Subject:From:To:References:In-Reply-To:From; b=aMlX06WBJ5JAfV2v66xaao5eHkN8N/mogdEl82PyQpERsrGuaeAxrG2OaUFgJL0/p SbfglhMBB/+c0PufctWiwPMGI3VoNUrYNWL+16dPOUlG8xvkSklmvVlD95xriKb0MC t5cpUIFT2MOBGiqFwo6HwTrv9EZrh5O5RhMrsEICpwDAWZE9h3mu8VCDP9IAIO03aR C1UXK6DBg+NUyDxEJ6I0hEceRcNQ3tO696hNOOLqiKMcXmvdSl4/4wlaHYn8Ymu/SS YnfrgRrSsqftY5GfgwmAZU3xIojsE3VdgxEW3pyRZ0nfBs8emhxBYVcROn+dKMHzJe FzMrFl2OZUiSQ== 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: Sat, 30 Nov 2024 04:44:21 +0200 Message-Id: Cc: "Peter Huewe" , "Jason Gunthorpe" , "James Bottomley" , , , Subject: Re: [REGRESSION][BISECTED] tpm: Popping noise in USB headphones since 1b6d7f9eb150 From: "Jarkko Sakkinen" To: "Christian Heusel" X-Mailer: aerc 0.18.2 References: <7d052744-4bfa-40bc-ba06-1b4c47a5eb87@heusel.eu> In-Reply-To: On Tue Nov 26, 2024 at 1:42 PM EET, Christian Heusel wrote: > On 24/10/25 05:47PM, Jarkko Sakkinen wrote: > > Yeah, this is on the list. > >=20 > > See: https://bugzilla.kernel.org/show_bug.cgi?id=3D219383#c5 > >=20 > > I had a fix for the AMD boot-time issue already over a month ago > > but unfortunately took time to get enough feedback. > >=20 > > BR, Jarkko > > I'm not sure if this is supposed to be fixed, but AFAIK we hoped that > the patchset that was mentioned in bugzilla also helped this issue. > > The reporter said that the bug is still present in 6.12.1, so this might > need further poking =F0=9F=A4=94 I'd suggest a workaround for the time being. In 6.12 we added this for (heavy) IMA use: tpm.disable_pcr_integrity=3D [HW,TPM] Do not protect PCR registers from unintended physic= al access, or interposers in the bus by the means of having an integrity protected session wrapped aroun= d TPM2_PCR_Extend command. Consider this in a situati= on where TPM is heavily utilized by IMA, thus protecti= on causing a major performance hit, and the space wher= e machines are deployed is by other means guarded. Similarly it might make sense to have "tpm.disable_random_integrity" that disables the feature introduced by the failing commit. What do you think? > > Cheers, > Chris BR, Jarkko