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arm64: Do not rely on SPCR table to detect acpi

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Since EDK2 commit d8e36289cef7bde628b023219cd65fa8e8d4562a, the Graphical console may
completely hide SPCR, causing panics later when locating timers.
As such simply rely on the ACPI Root pointer presence.

Submitted by:	dan.kotowski@a9development.com
Reviewed by:	andrew, mw
Differential Revision:	https://reviews.freebsd.org/D27306
This commit is contained in:
Emmanuel Vadot 2020-11-26 20:22:34 +00:00
parent 891bc22d39
commit df15910266
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=368081
1 changed files with 1 additions and 1 deletions
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2
sys/arm64/arm64/machdep.c
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@ -1036,7 +1036,7 @@ bus_probe(void)
has_fdt = (OF_peer(0) != 0);
#endif
#ifdef DEV_ACPI
has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
has_acpi = (AcpiOsGetRootPointer() != 0);
#endif
env = kern_getenv("kern.cfg.order");