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PR/49323 CVS commit: [netbsd-8] src/sys/arch
The following reply was made to PR kern/49323; it has been noted by GNATS.
From: "Martin Husemann" <martin%netbsd.org@localhost>
Subject: PR/49323 CVS commit: [netbsd-8] src/sys/arch
Date: Tue, 21 Nov 2017 11:01:02 +0000
Module Name: src
Committed By: martin
Date: Tue Nov 21 11:01:02 UTC 2017
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
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:
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"
Tested both amd64 and i386 on Client Hyper-V on Windows 10.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r184.108.40.206 src/sys/arch/amd64/include/i82093reg.h
cvs rdiff -u -r1.10 -r220.127.116.11 src/sys/arch/i386/include/i82093reg.h
cvs rdiff -u -r1.52 -r18.104.22.168 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.
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