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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2023-04-14 10:20:03 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2023-04-21 09:38:26 +0000 |
| commit | 67c48a36776695b956ea49eb308c1025e430b475 (patch) | |
| tree | 47dbf975b060fec1656166fbbc08a97122c8ed72 /src/acpi/acpi.c | |
| parent | 88fefd4feb61d20945a1be4a792f8236db1bb2d0 (diff) | |
ACPI: Obsolete FADT p_lvl2_lat and p_lvl3_lat fields
After the obsoletion of Processor() it is necessary to provide
_CST package to define P_LVLx IO addresses for C2/C3 transitions.
The latency values from _CST will always replace those in FADT.
Change-Id: I3230be719659fe9cdf9ed6ae73bc91b05093ab97
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74430
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Diffstat (limited to 'src/acpi/acpi.c')
| -rw-r--r-- | src/acpi/acpi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index 492d043bb8..f8994eb9e9 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -1685,6 +1685,10 @@ void acpi_create_fadt(acpi_fadt_t *fadt, acpi_facs_t *facs, void *dsdt) /* should be 0 ACPI 3.0 */ fadt->reserved = 0; + /* P_LVLx latencies are not used as CPU _CST will override them. */ + fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED; + fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED; + fadt->preferred_pm_profile = acpi_get_preferred_pm_profile(); if (CONFIG(USE_PC_CMOS_ALTCENTURY)) |