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 84E77D27E for ; Tue, 4 Nov 2025 21:09:39 +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=1762290579; cv=none; b=XfimYs26rA1sou+avryPtdgItSFVfjAmOGaykRNhOuFvbcQv4+eqiqTR8IebFHoaBH5g7l05WWWQWQyMxojgQvsf6ub8o/NnDJSEkdTw3GO5nbx97ZcnCGkndNcSYvzrsL/PmU7/EFwFX+q5Ns+3sflpFLGz7yBbTFUKyAvQr5c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762290579; c=relaxed/simple; bh=e2WTpmQG7WCmNMuKRQtaccCgfg3ks/9390GyLPFWLTk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=EGJp0VeISG1T0xC/+FQO38WTZ18055Q3SQTVPQaLQaA2cIax4tA/tJ9IgFcBvvDjjRSBha+Dr3TFuVayzSP8pd2JXk0ZKcqCbwTGnqOviCsyp3PzabHL7Q6LFEQfFN3TVXiXEQzg8i2Tst2SvWtVn/hDMl6hTfJtjnb5gYgSuRI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XPZcmR9v; 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="XPZcmR9v" Received: by smtp.kernel.org (Postfix) with ESMTPS id 0C85DC19422 for ; Tue, 4 Nov 2025 21:09:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762290579; bh=e2WTpmQG7WCmNMuKRQtaccCgfg3ks/9390GyLPFWLTk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=XPZcmR9vpcXt3YA9/nTaw9YgjcUMgGhdMxTfxDxhMTDM244r06RcbfMvvjE1M9TF5 Z6LO1KhBqGLC/t6em1/xcxOVcSjf47WALaWySf0F7wJtxd12tZzXCeHn/ExamM8/us dNY900dn6RkCJBKEvuovhbgfz+F3kUocuJFOFiT3hH2slkqxq4ixiP+I3m9ctW1xpT BbdDOIX+HJb44vHknEUdFhJo10KUgGEMNUZW8YfuHQTEzy8hQa/CRVUKw1a2H4mIPF IDjMzBc+HfupqPgA+a96gLFqFgl83OB+5TJtR+wps+aDcnzcORBto9HCvcmi6C9+xM dBfNTIxCKyl4g== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 04264C433E1; Tue, 4 Nov 2025 21:09:39 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 220715] [REGRESSION] AMD P-State fails with "_CPC object is not present" on AMD Zen 4 between 6.10 and 6.11 Date: Tue, 04 Nov 2025 21:09:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Power Management X-Bugzilla-Component: cpufreq X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: chris.harris79@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220715 --- Comment #21 from Chris Harris (chris.harris79@gmail.com) --- Created attachment 308892 --> https://bugzilla.kernel.org/attachment.cgi?id=3D308892&action=3Dedit dmesg-6.17-SUCCESS-online-cpu.txt Successful boot with amd-pstate + nosmt=3Dforce with the following patches applied: 1. arch/x86/kernel/acpi/cppc.c (amd_detect_prefcore): for_each_present_cpu =E2=86=92 for_each_online_cpu 2. drivers/acpi/cppc_acpi.c (acpi_cpc_valid): for_each_present_cpu =E2=86=92 for_each_online_cpu --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=