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 DC4DA4C7F; Mon, 23 Jun 2025 13:25:28 +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=1750685128; cv=none; b=MXlgSpku5ZVnqxcXWF6ta9CoH31qI+5aPWH119nVIGbcdIfutTN+CFHwev+hv9XG5Rb3dnzO3a58qFNtlro+2/6vS9C6rPhdUwOQ3SmQHJadaTU0h5HWu64OXukujwL+DN1FSgFaSpm4GK9Gw8Wigi4uIWUbbuJmmpbZbAN6Ifw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750685128; c=relaxed/simple; bh=FRRJtSvkQHaUP5QuF081791/MVFwsRweFKgm0gliD58=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GGGad+HGkpcRqKYmmubaVS+gwfhARVkQMwDxANbVMRH0WuWdqJnoaTOb4HU4rpOGG9gTqvfWnRiWK9dvyPYzY4wuUYLsgOU/wXJGec1sPzvqQUn5uO8RG4wmcX8eLkgoNovPpKVD8rnEQdfLbIJpBej0F/C5IXb69VY77Og1+4I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nLO4AFEu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nLO4AFEu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D6BAC4CEEA; Mon, 23 Jun 2025 13:25:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750685128; bh=FRRJtSvkQHaUP5QuF081791/MVFwsRweFKgm0gliD58=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nLO4AFEu1cqGDjKQ8T9n7m0UAwXFPU+6iEZQxkg9ZMzDsSOqd5fP6vH6KRfGZEOpH LibnJgdwK/IjQ2W0OwhwSB/J3dsucBllI+0ER/osYMEPWi+ck1At8rzuTkFdxow15S 4cJVJM+hXEznq79VsIOIaTyYR0lMDe5c/jqV1ZoM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manu Bretelle , "Gautham R. Shenoy" , "Rafael J. Wysocki" Subject: [PATCH 5.15 004/411] acpi-cpufreq: Fix nominal_freq units to KHz in get_max_boost_ratio() Date: Mon, 23 Jun 2025 15:02:28 +0200 Message-ID: <20250623130633.123430081@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130632.993849527@linuxfoundation.org> References: <20250623130632.993849527@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gautham R. Shenoy commit cb6a85f38f456b086c366e346ebb67ffa70c7243 upstream. commit 083466754596 ("cpufreq: ACPI: Fix max-frequency computation") modified get_max_boost_ratio() to return the nominal_freq advertised in the _CPC object. This was for the purposes of computing the maximum frequency. The frequencies advertised in _CPC objects are in MHz. However, cpufreq expects the frequency to be in KHz. Since the nominal_freq returned by get_max_boost_ratio() was not in KHz but instead in MHz,the cpuinfo_max_frequency that was computed using this nominal_freq was incorrect and an invalid value which resulted in cpufreq reporting the P0 frequency as the cpuinfo_max_freq. Fix this by converting the nominal_freq to KHz before returning the same from get_max_boost_ratio(). Reported-by: Manu Bretelle Closes: https://lore.kernel.org/lkml/aDaB63tDvbdcV0cg@HQ-GR2X1W2P57/ Fixes: 083466754596 ("cpufreq: ACPI: Fix max-frequency computation") Signed-off-by: Gautham R. Shenoy Cc: 6.14+ # 6.14+ Link: https://patch.msgid.link/20250529085143.709-1-gautham.shenoy@amd.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/acpi-cpufreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -661,7 +661,7 @@ static u64 get_max_boost_ratio(unsigned nominal_perf = perf_caps.nominal_perf; if (nominal_freq) - *nominal_freq = perf_caps.nominal_freq; + *nominal_freq = perf_caps.nominal_freq * 1000; if (!highest_perf || !nominal_perf) { pr_debug("CPU%d: highest or nominal performance missing\n", cpu);