From mboxrd@z Thu Jan 1 00:00:00 1970 From: prarit@redhat.com (Prarit Bhargava) Date: Thu, 7 Dec 2017 12:29:10 -0500 Subject: [PATCH 0/2] acpi, x86: Add SPCR table support Message-ID: <20171207172912.17868-1-prarit@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The SPCR (Serial Port Console Redirection) Table provides information about the configuration of serial port. This information can be used to configure the early console. SPCR support was added for arm64 and is made available across all arches in this patchset. The first patch adds a weak per-arch configuration function and moves the SPCR code into ACPI. The second patch adds support to x86. The existing behaviour on arm64 is maintained. If the SPCR exists the earlycon and console are automatically configured. The existing default behaviour on x86 is also maintained. If no console or earlycon parameter is defined and the SPCR exists , the serial port is not configured. If the earlycon parameter is used both the early console and the console are configured using the data from the SPCR. Signed-off-by: Prarit Bhargava Cc: linux-doc at vger.kernel.org Cc: linux-kernel at vger.kernel.org Cc: linux-arm-kernel at lists.infradead.org Cc: linux-pm at vger.kernel.org Cc: linux-acpi at vger.kernel.org Cc: linux-serial at vger.kernel.org Cc: Bhupesh Sharma Cc: Lv Zheng Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x86 at kernel.org Cc: Jonathan Corbet Cc: Catalin Marinas Cc: Will Deacon Cc: "Rafael J. Wysocki" Prarit Bhargava (2): acpi, spcr: Make SPCR avialable to other architectures acpi, x86: Use SPCR table for earlycon on x86 Documentation/admin-guide/kernel-parameters.txt | 9 +- arch/arm64/Kconfig | 1 - arch/arm64/kernel/acpi.c | 128 +++++++++++++++++- arch/x86/kernel/acpi/boot.c | 3 + drivers/acpi/Kconfig | 11 +- drivers/acpi/spcr.c | 171 ++++++------------------ drivers/tty/serial/earlycon.c | 16 +-- include/linux/acpi.h | 14 +- include/linux/serial_core.h | 2 - 9 files changed, 195 insertions(+), 160 deletions(-) -- 1.8.3.1