CVS commit: [netbsd-8] src/sys/arch

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue Nov 21 11:01:02 UTC 2017

Modified Files:
        src/sys/arch/amd64/include [netbsd-8]: i82093reg.h
        src/sys/arch/i386/include [netbsd-8]: i82093reg.h
        src/sys/arch/x86/x86 [netbsd-8]: ioapic.c

Log Message:
Pull up following revision(s) (requested by nakayama in ticket #359):
        sys/arch/amd64/include/i82093reg.h: revision 1.9
        sys/arch/x86/x86/ioapic.c: revision 1.54
        sys/arch/i386/include/i82093reg.h: revision 1.11
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.


To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.8.2.1 src/sys/arch/amd64/include/i82093reg.h
cvs rdiff -u -r1.10 -r1.10.2.1 src/sys/arch/i386/include/i82093reg.h
cvs rdiff -u -r1.52 -r1.52.10.1 src/sys/arch/x86/x86/ioapic.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.