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Re: port-amd64/47967: DTrace does not work while running under QEMU
The following reply was made to PR port-amd64/47967; it has been noted by GNATS.
From: Jukka Ruohonen <jruohonen%iki.fi@localhost>
Subject: Re: port-amd64/47967: DTrace does not work while running under QEMU
Date: Wed, 26 Jun 2013 21:02:44 +0300
On Wed, Jun 26, 2013 at 05:35:00PM +0000, riz%NetBSD.org@localhost wrote:
> QEMU does not implement MSR_TSC, so reads there with rdmsr() always
> Install system built with MKDTRACE=yes under QEMU, and
Alternatively, something like rdmsr_safe(9) somewhere in arch/x86/tsc.c
seems more appropriate. But it is unclear whether this is a real bug in
Qemu, given that the TSC MSR should be available since Pentium XXX, I think
(without actually checking this from the documentation).
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