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| author | Prarit Bhargava | 2018-01-18 16:09:51 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki | 2018-02-07 11:39:58 +0100 |
| commit | 0231d00082f61cfe03f2b7c27e5356f8cdf0312c (patch) | |
| tree | 24f036cb972640ccdeed395a55d1c37571fcb3db /drivers/acpi/Kconfig | |
| parent | ACPI / tables: Add IORT to injectable table list (diff) | |
| download | kernel-qcow2-linux-0231d00082f61cfe03f2b7c27e5356f8cdf0312c.tar.gz kernel-qcow2-linux-0231d00082f61cfe03f2b7c27e5356f8cdf0312c.tar.xz kernel-qcow2-linux-0231d00082f61cfe03f2b7c27e5356f8cdf0312c.zip | |
ACPI: SPCR: Make SPCR available to x86
SPCR is currently only enabled or ARM64 and x86 can use SPCR to setup
an early console.
General fixes include updating Documentation & Kconfig (for x86),
updating comments, and changing parse_spcr() to acpi_parse_spcr(),
and earlycon_init_is_deferred to earlycon_acpi_spcr_enable to be
more descriptive.
On x86, many systems have a valid SPCR table but the table version is
not 2 so the table version check must be a warning.
On ARM64 when the kernel parameter earlycon is used both the early console
and console are enabled. On x86, only the earlycon should be enabled by
by default. Modify acpi_parse_spcr() to allow options for initializing
the early console and console separately.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mark Salter <msalter@redhat.com>
Tested-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/Kconfig')
| -rw-r--r-- | drivers/acpi/Kconfig | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 46505396869e..ddcb5f40e8ee 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -79,7 +79,12 @@ config ACPI_DEBUGGER_USER endif config ACPI_SPCR_TABLE - bool + bool "ACPI Serial Port Console Redirection Support" + default y if X86 + help + Enable support for Serial Port Console Redirection (SPCR) Table. + This table provides information about the configuration of the + earlycon console. config ACPI_LPIT bool |