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nakayama eafc5bd35a Don't write a 1 to the read only RIRR bit in the IOAPIC redirection

register to fix "tlp0: filter setup and transmit timeout" observed
on Hyper-V VMs with the Legacy Network Adapter.

From OpenBSD via PR kern/49323:

 https://marc.info/?l=openbsd-cvs&m=146718035432599&w=2

| Modified files:
|	sys/arch/amd64/amd64: ioapic.c
|	sys/arch/amd64/include: i82093reg.h
|
| Log message:
| Don't write a 1 to the RIRR bit in the IOAPIC redirection register. This bit
| is R/O, and although it should not matter what value is written there,
| Hyper-V's emulated IOAPIC interprets a write of 1 in some unexpected way and
| subsequently blocks interrupt delivery. This primarily manifests itself as
| de(4) timeouts when using Hyper-V VMs with the "Legacy Network Adapter"
| interface.

Tested both amd64 and i386 on Client Hyper-V on Windows 10.

2017-11-13 11:45:54 +00:00

bin

PR bin/52715

2017-11-10 17:31:12 +00:00

common

Restore a local change (in rev1.4) that was lost on zlib 1.12.10 merge.

2017-11-12 07:55:05 +00:00

compat

…

crypto

fix typo. (does not affect actual operation, but confuses reader...)

2017-11-09 08:34:50 +00:00