https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262638
Bug ID: 262638
Summary: overly strict check of hpet region size
Product: Base System
Version: 13.0-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
FreeBSD warns during boot of my HPE Proliant DL325 (AMD EPYC 7402P):
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed001ff on acpi0
hpet0: memory region width 512 too small
device_attach: hpet0 attach returned 6
The hpet driver requires at least 1024 bytes of address space. This appears to
be overly strict because the address space used depends on the number of
counters. See HPET_TIMER_CAP_CNF and related macros. My 512 byte address
space should be sufficient for 8 counters. (I have not checked what the
configuration registers say. I can hack up my kernel to report them if the
answer is imporant.)
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