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 2AA341F09B3; Fri, 21 Nov 2025 13:29:01 +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=1763731741; cv=none; b=XylxClrEyNNN0oFAxoeCQu78tx4p4YdGGhbkfQCKEp7HV6wQSlD9N3WDfzI5M3/zgW0i8qjyT86MM6SJVn+I1dqb554qUZST/Vu6je6UzvH6d3a2MGFsbhRUcFpDudRnENyqKzvV5bwpQsiBxHtp9DrD6W9dK9HEXOkwJXX6J68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763731741; c=relaxed/simple; bh=gDbsgXuSaiPr/UN2sxdV4g2h1JidFDX2L2rM9bIJBSk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=V6dBsPwVvmPkQNkJ4jq/FSTZigv2Tc2Q2ALj5nHcXMeP0vtosEdchWq2zfaGEF6EcJC9RVD2bmQzRQCdAlfTkbbpfEHd1ZlVmu5qaxfSwEvDLEEBjkEbDoM1STYwd4OFkublG/fSCrq+bbVze/tK4OIT7NxkCkJM3evltsCVUug= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LjZyUjAq; 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="LjZyUjAq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A39F5C4CEF1; Fri, 21 Nov 2025 13:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763731741; bh=gDbsgXuSaiPr/UN2sxdV4g2h1JidFDX2L2rM9bIJBSk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LjZyUjAqXP2fhhnSuCzYDI31yQbCTMju3fergH0NwkkVx65Q2hIxXxZtT70rDZ2Jh 76ctv12hrQZsAKlYjgXTkFd7M2RyxBHsFw0uK98qYSAlQcnQ1BTE6B4o7c2o1ZXp4p +1uFRMJZM18szbJuCcb1X4Xmd4CQCUk616aIYJ30= 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 6.12 065/185] ACPI: CPPC: Limit perf ctrs in PCC check only to online CPUs Date: Fri, 21 Nov 2025 14:11:32 +0100 Message-ID: <20251121130146.222714090@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130143.857798067@linuxfoundation.org> References: <20251121130143.857798067@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-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 c4a1fee4b4873..62b723f6c48df 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1366,7 +1366,7 @@ 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