John Baldwin wrote: > On Monday 21 June 2010 4:08:33 pm Alexander Motin wrote: >> Kostik Belousov wrote: >>> On Sun, Jun 20, 2010 at 09:33:29PM +0000, Alexander Motin wrote: >>>> Author: mav >>>> Date: Sun Jun 20 21:33:29 2010 >>>> New Revision: 209371 >>>> URL: http://svn.freebsd.org/changeset/base/209371 >>>> >>>> Log: >>>> Implement new event timers infrastructure. It provides unified APIs for >>>> writing event timer drivers, for choosing best possible drivers by > machine >>>> independent code and for operating them to supply kernel with > hardclock(), >>>> statclock() and profclock() events in unified fashion on various > hardware. >>> This broke QEMU for me. I cannot boot FreeBSD guest under QEMU anymore. >>> QEMU (not FreeBSD kernel) panics with >>> qemu: level-triggered hpet not supported >>> message. >> According to specification, it is not optional. No more cookies! > > Why do you even need a level triggered interrupt? The FSB interrupt is not > shared with anything else, so it can be edge triggered just fine. We set all > MSI interrupts to edge triggered on x86.
FSB interrupts, when supported, surely work as edge-triggered. But not all hardware support FSB interrupts. In such cases level-triggering used, to be able to share interrupts. Without verbose dmesg I can't imagine what QEMU supports and what exactly happened there. -- Alexander Motin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
