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 494FE2D73A4; Fri, 21 Nov 2025 13:55:18 +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=1763733319; cv=none; b=M2TA474KJSEsh4RVK7dQcemUXbY7l7gpIZ5d6KxXPF7zZ+rchDexfC/xcGLwgIdudOQVIqjyv2lcGZFAIX81WuBOzjJZyjhp0dxDMDheY+dxfTuLMWg2tBN4QJwTaR8GaaZSOpTgHnBpM8Wr7WN7EMOlifQHHxdbGbettkBDO8U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763733319; c=relaxed/simple; bh=FX8nSIQApwzZ/W+gEXvsvU80/BNjSeUT4dQvSYFV0oQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nM+HxSoMLDH8IBbNuRCp5w9K5Q9yDonMK7z72MDPLW3Zc2F/Wk0kgo7ibFXBNC36MsKR5ZgRyxWX4TAG8cZRcHQeVsoybzzv3R1/FO/bRqiKiIpAqppfRee98AXt3bkJW+t1srf6Ka/flZkUvflWR8mGRrbfHTDyW4szS85//9Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oDX/mYt6; 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="oDX/mYt6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E178C4CEF1; Fri, 21 Nov 2025 13:55:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763733318; bh=FX8nSIQApwzZ/W+gEXvsvU80/BNjSeUT4dQvSYFV0oQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oDX/mYt6su5XDlLdI88WMolwtIimYw6AbxWwl4Pkimd/tn+kBNJHMRpJ99FQ7FEPK nf01zqNXXLs5fL/JmVVHiOWhFPl7FO1/V5AmlzRjfvxAddn0MnB5SqnPs4hH2kPwd+ r+spPYOC4rEVZp7O1Dqcat6ACqEKcNIWs+WTu6Wo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Mario Limonciello (AMD) (kernel.org)" , "Gautham R. Shenoy" , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 6.6 420/529] ACPI: CPPC: Limit perf ctrs in PCC check only to online CPUs Date: Fri, 21 Nov 2025 14:11:59 +0100 Message-ID: <20251121130245.959524769@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130230.985163914@linuxfoundation.org> References: <20251121130230.985163914@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gautham R. Shenoy [ Upstream commit 0fce75870666b46b700cfbd3216380b422f975da ] per_cpu(cpc_desc_ptr, cpu) object is initialized for only the online CPU via acpi_soft_cpu_online() --> __acpi_processor_start() --> acpi_cppc_processor_probe(). However the function cppc_perf_ctrs_in_pcc() checks if the CPPC perf-ctrs are in a PCC region for all the present CPUs, which breaks when the kernel is booted with "nosmt=force". Hence, limit the check only to the online CPUs. Fixes: ae2df912d1a5 ("ACPI: CPPC: Disable FIE if registers in PCC regions") Reviewed-by: "Mario Limonciello (AMD) (kernel.org)" Signed-off-by: Gautham R. Shenoy Link: https://patch.msgid.link/20251107074145.2340-5-gautham.shenoy@amd.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/cppc_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 6e579be36a1eb..888c7838579a8 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1368,7 +1368,7 @@ bool cppc_perf_ctrs_in_pcc(void) { int cpu; - for_each_present_cpu(cpu) { + for_each_online_cpu(cpu) { struct cpc_register_resource *ref_perf_reg; struct cpc_desc *cpc_desc; -- 2.51.0