From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aleksey Makarov Subject: [PATCH v5 4/6] ACPI: enable ACPI_SPCR_TABLE on ARM64 Date: Tue, 22 Mar 2016 13:46:31 +0300 Message-ID: <1458643595-14719-5-git-send-email-aleksey.makarov@linaro.org> References: <1458643595-14719-1-git-send-email-aleksey.makarov@linaro.org> Return-path: Received: from mail-lb0-f169.google.com ([209.85.217.169]:34584 "EHLO mail-lb0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759177AbcCVKs7 (ORCPT ); Tue, 22 Mar 2016 06:48:59 -0400 Received: by mail-lb0-f169.google.com with SMTP id k12so155411932lbb.1 for ; Tue, 22 Mar 2016 03:48:57 -0700 (PDT) In-Reply-To: <1458643595-14719-1-git-send-email-aleksey.makarov@linaro.org> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Greg Kroah-Hartman , "Rafael J . Wysocki" , Len Brown Cc: linux-serial@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Aleksey Makarov , Russell King , Leif Lindholm , Graeme Gregory , Al Stone , Christopher Covington , Yury Norov , Peter Hurley , "Zheng, Lv" , Catalin Marinas , Will Deacon SBBR mentions SPCR as a mandatory ACPI table. So enable it for ARM64 Earlycon should be set up as early as possible. ACPI boot tables are mapped in arch/arm64/kernel/acpi.c:acpi_boot_table_init() called from setup_arch() and that's where we parse SPCR. So it has to be opted-in per-arch. Signed-off-by: Aleksey Makarov --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/acpi.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 07b6a16..c77b4b2 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -3,6 +3,7 @@ config ARM64 select ACPI_CCA_REQUIRED if ACPI select ACPI_GENERIC_GSI if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI + select ACPI_SPCR_TABLE if ACPI select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index d1ce8e2..36d6f70 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -208,6 +208,8 @@ void __init acpi_boot_table_init(void) pr_err("Failed to init ACPI tables\n"); if (!param_acpi_force) disable_acpi(); + } else { + parse_spcr(); } } -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: aleksey.makarov@linaro.org (Aleksey Makarov) Date: Tue, 22 Mar 2016 13:46:31 +0300 Subject: [PATCH v5 4/6] ACPI: enable ACPI_SPCR_TABLE on ARM64 In-Reply-To: <1458643595-14719-1-git-send-email-aleksey.makarov@linaro.org> References: <1458643595-14719-1-git-send-email-aleksey.makarov@linaro.org> Message-ID: <1458643595-14719-5-git-send-email-aleksey.makarov@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org SBBR mentions SPCR as a mandatory ACPI table. So enable it for ARM64 Earlycon should be set up as early as possible. ACPI boot tables are mapped in arch/arm64/kernel/acpi.c:acpi_boot_table_init() called from setup_arch() and that's where we parse SPCR. So it has to be opted-in per-arch. Signed-off-by: Aleksey Makarov --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/acpi.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 07b6a16..c77b4b2 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -3,6 +3,7 @@ config ARM64 select ACPI_CCA_REQUIRED if ACPI select ACPI_GENERIC_GSI if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI + select ACPI_SPCR_TABLE if ACPI select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index d1ce8e2..36d6f70 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -208,6 +208,8 @@ void __init acpi_boot_table_init(void) pr_err("Failed to init ACPI tables\n"); if (!param_acpi_force) disable_acpi(); + } else { + parse_spcr(); } } -- 2.7.4