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 9C8231EB4A0 for ; Thu, 1 Aug 2024 03:39:34 +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=1722483574; cv=none; b=j2qxASS0G4dWySclrEKNe2zNz0VwwK8U6urIt4q1GeyQaQG4adxaKfg7I5KXPM5HRzsem5TxRn/c+kXANKty15JTagKxFgS5uqKVHgKBf3p1bT4UftmlVfXYeKgLcwrVtJ60tV3gElpURmgDEXu3fV7AlWPAa7a8/mys9vbevzI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722483574; c=relaxed/simple; bh=6jGorjGxUi1F1TAGp5kIZClImuoFXSIwBSFnuheaKQ4=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=fXe8124iBLbpKvEdTaELtn+j8yIlZMVA+d2AI5EiqdkDIefAUOC+8jYAxeVM4wl4s5KAW+7H7H0DN2nlX1MNYEnZbAkN9hHpOq7i8xTD8WQQSRIKM2X+e6QBtniV5bmLBK6ji/mFLsxx5O/hnbdXpf3sxzWfHx8L/6X25ASQino= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HIg4eFMZ; 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="HIg4eFMZ" Received: by smtp.kernel.org (Postfix) with ESMTPS id 27FE2C4AF12 for ; Thu, 1 Aug 2024 03:39:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722483574; bh=6jGorjGxUi1F1TAGp5kIZClImuoFXSIwBSFnuheaKQ4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=HIg4eFMZxpLl79qAo42uJy2x/rxyKp5mOHfAMvB8Do3dxee1YwxycJtVYT3gb0d5Z 6hs+ZJ5txetaZVwdJDkwH20nCOKYs7KzCfPZlTtfnlZf4EosDYOq8zT0HWVaeFvzgm OCVp0AC/aSSTzOOHcK5kOO27BmUVsu0w6TR/WCKgeH9EViC1SjrgaW7gYiEGFqPj7j QY5G3rr1t+3bPj9B5gKpWMs3ZRIuf7BS/t00xbN6TqY2woLOt8ppn8F7ZlvxESzpzr K5NzxcYqBbL4UOqSAbxKM/r/UgZ7rYkrxNp4yfk8kaveLmtV8zEG5ab9bXa1vgWcmW wEfmHkP6cB0Ow== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 1F52CC433E5; Thu, 1 Aug 2024 03:39:34 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 218686] Fail to set energy_performance_preference of amd processor on asus ga403uv Date: Thu, 01 Aug 2024 03:39:33 +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: Perry.Yuan@amd.com X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: DOCUMENTED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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=3D218686 --- Comment #67 from Perry Yuan(AMD) (Perry.Yuan@amd.com) --- https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/progra= mmer-references/55901_B1_pub_053.zip=20 Page 120. CPUID_Fn80000008_EBX [Extended Feature Extensions ID EBX]=20=20 Bit 27 CPPC. Read-only. Reset: 1. Collaborative Processor Performance Contr= ol. sudo cpuid -l 0x80000008 -r CPU 0: 0x80000008 0x00: eax=3D0x00003030 ebx=3D0x111ef257 ecx=3D0x0000400f edx= =3D0x00010000 Bit 27 =3D 0, that means BIOS didn`t enable CPPC capability, OS cannot dete= ct the CPPC flag on the system,=20 you can check lscpu output, #lscpu |grep cppc. Windows maybe don`t depends on this CPUID bit, but Linux detect the CPUID a= nd set cppc flag at kernel booting. no cppc flag, amd-pstate driver cannot loa= d so far. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=