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ACPI: Obsolete FADT p_lvl2_lat and p_lvl3_lat fields

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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>
This commit is contained in:
Kyösti Mälkki
2023-04-14 10:20:03 +03:00
parent 88fefd4feb
commit 67c48a3677
13 changed files with 4 additions and 39 deletions
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4
src/acpi/acpi.c
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@@ -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))