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Re: [PATCH 0/7] Add MMIO serial ports support and SPCR detection
From: |
Benjamin Herrenschmidt |
Subject: |
Re: [PATCH 0/7] Add MMIO serial ports support and SPCR detection |
Date: |
Fri, 02 Sep 2022 16:23:37 +1000 |
User-agent: |
Evolution 3.44.1-0ubuntu1 |
On Fri, 2022-09-02 at 16:12 +1000, Benjamin Herrenschmidt wrote:
> This series improves our legacy serial support to add the ability
> to use MMIO based serial ports on x86 and to use ACPI's SPCR to
> automatically configure the default port.
>
> An MMIO serial port can be specified explicitely using the
> "mmio," prefix for the --port argument to the 'serial' command,
> the register access size can also be specified via a suffix,
> and when 'serial' is used without arguments, it will try to use
> an ACPI SPCR entry (if any) to add the default port and configure
> it appropriately (speed, parity etc...)
I forgot to mention that typically MMIO UARTs are found on AWS EC2
"metal" instances, whose firmware also conveniently populates SPCR.
This allows grub serial to work on these.
Cheers,
Ben.
- [PATCH 0/7] Add MMIO serial ports support and SPCR detection, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 1/7] acpi: Export a generic grub_acpi_find_table, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 2/7] acpi: Add SPCR and generic address definitions, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 3/7] ns8250: Add base support for MMIO UARTs, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 4/7] ns8250: Add configuration parameter when adding ports, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 6/7] ns8250: Support more MMIO access sizes, Benjamin Herrenschmidt, 2022/09/02
- [PATCH 7/7] serial: Add ability to specify MMIO ports via 'serial', Benjamin Herrenschmidt, 2022/09/02
- [PATCH 5/7] ns8250: Use ACPI SPCR table when available to configure serial, Benjamin Herrenschmidt, 2022/09/02
- Re: [PATCH 0/7] Add MMIO serial ports support and SPCR detection,
Benjamin Herrenschmidt <=