From patchwork Tue Mar 12 13:41:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13590015 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 9BF995B1E1; Tue, 12 Mar 2024 13:41:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710250918; cv=none; b=V3YH6NNAzbKvKuk5g1aitiffYsUhnpDydhYR+oRQZaXirwTXdBAiN0iG0zjcGL8FOZw63cUrkA8NwHpBnAd1JTyOxgfe2A+U7bhEtRz2LEhzIPWjY7wml6evVsP2pXIAutopfC9QuvwEX94wSmHCCUZf/UcqPvaVXwlXcLT4hf4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710250918; c=relaxed/simple; bh=e0tD6pX6xwZoiwXkNmdHyZiDqoGTK5swzwTMQ0e4R40=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=oHkAKf+Pgaqv9M188Xu2INAnVKAR+9Zb57pmPO+nwIGXDREtvKMv67EbogPrHsTNCXsMu2TGWeugLcPytLL0FMcXYfZebFBbcLT7ymKwWmYq/+E6JiK6dT5VTG2HdvDA3Wu1q7a8tJMlubH7MmaHH5UrSwB1vRHZTC9RTLPWOZY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=desiato.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=AsFv99gt; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=desiato.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="AsFv99gt" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=xa8JQ3KvRA3TOgaBHWeRGuMMjhi7suQa/WUm17VoCcg=; b=AsFv99gt9tiVB4IvPWpp0zhn/q yAbrTW80SEAlzDGcnxg0eIauLDMd8Ueell+LxV1jgKPF6ZeEHtxE95I4up6xl7/iYxoR+E4PbscFS +UKnA2/qIyCqV3MF1qK3cHd7Ga86D01o45mEWZJYrJCtP3dPc57wEz85CqU/DQ7FdAyoK2Xzr+xOA lc08WumNg6hxdL2/7cf6dYDCvBqBGk5/WMCu2n4/5DIZhidooDV9qS9CdjA0WHKMGaYl8sZrPs1Al 9yNGbz6L5ql2Ubj5V3bvOM24V/9i7h58oz/wSqcZ5nkqkWPI2BQUaR0BzstRC23MOlPJRUqwNECAT VAq7uKSw==; Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by desiato.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1rk2O5-00000009UzB-2mNO; Tue, 12 Mar 2024 13:41:49 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rk2O4-000000033FJ-0PsV; Tue, 12 Mar 2024 13:41:48 +0000 From: David Woodhouse To: linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas , Will Deacon , Robert Moore , "Rafael J. Wysocki" , Len Brown , mediou@amazon.de, alisaidi@amazon.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev Subject: [PATCH 1/2] ACPICA: Detect FACS even for hardware reduced platforms Date: Tue, 12 Mar 2024 13:41:46 +0000 Message-ID: <20240312134148.727454-1-dwmw2@infradead.org> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html From: David Woodhouse ACPICA PR https://github.com/acpica/acpica/pull/933 The FACS is optional even on hardware reduced platforms, and may exist for the purpose of communicating the hardware_signature field to provke a clean reboot instead of a resume from hibernation. Signed-off-by: David Woodhouse --- drivers/acpi/acpica/tbfadt.c | 30 +++++++++++++----------------- drivers/acpi/acpica/tbutils.c | 7 +------ 2 files changed, 14 insertions(+), 23 deletions(-) diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c index 44267a92bce5..3c126c6d306b 100644 --- a/drivers/acpi/acpica/tbfadt.c +++ b/drivers/acpi/acpica/tbfadt.c @@ -315,23 +315,19 @@ void acpi_tb_parse_fadt(void) ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE, &acpi_gbl_dsdt_index); - /* If Hardware Reduced flag is set, there is no FACS */ - - if (!acpi_gbl_reduced_hardware) { - if (acpi_gbl_FADT.facs) { - acpi_tb_install_standard_table((acpi_physical_address) - acpi_gbl_FADT.facs, - ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, - NULL, FALSE, TRUE, - &acpi_gbl_facs_index); - } - if (acpi_gbl_FADT.Xfacs) { - acpi_tb_install_standard_table((acpi_physical_address) - acpi_gbl_FADT.Xfacs, - ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, - NULL, FALSE, TRUE, - &acpi_gbl_xfacs_index); - } + if (acpi_gbl_FADT.facs) { + acpi_tb_install_standard_table((acpi_physical_address) + acpi_gbl_FADT.facs, + ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, + NULL, FALSE, TRUE, + &acpi_gbl_facs_index); + } + if (acpi_gbl_FADT.Xfacs) { + acpi_tb_install_standard_table((acpi_physical_address) + acpi_gbl_FADT.Xfacs, + ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, + NULL, FALSE, TRUE, + &acpi_gbl_xfacs_index); } } diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index bb4a56e5673a..15fa68a5ea6e 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -36,12 +36,7 @@ acpi_status acpi_tb_initialize_facs(void) { struct acpi_table_facs *facs; - /* If Hardware Reduced flag is set, there is no FACS */ - - if (acpi_gbl_reduced_hardware) { - acpi_gbl_FACS = NULL; - return (AE_OK); - } else if (acpi_gbl_FADT.Xfacs && + if (acpi_gbl_FADT.Xfacs && (!acpi_gbl_FADT.facs || !acpi_gbl_use32_bit_facs_addresses)) { (void)acpi_get_table_by_index(acpi_gbl_xfacs_index,