[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] Regression with floppy drive controller
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] Regression with floppy drive controller |
Date: |
Wed, 21 Aug 2019 08:42:08 +0200 |
User-agent: |
NeoMutt/20180716 |
Hi,
> Using the default QEMU config, we build SeaBIOS to use the TSC timer:
>
> builds/seabios-128k/.config:CONFIG_TSC_TIMER=y
> builds/seabios-256k/.config:CONFIG_TSC_TIMER=y
> Do we need a cpu with TSC support to run SeaBIOS?
Hmm. seabios uses pmtimer if available. isapc has no pmtimer though,
so it uses TSC instead.
> So we should use '-cpu Conroe' or '-cpu core2duo' minimum?
-cpu Conroe for -M isapc is kida silly though ...
Maybe we should simply build seabios with CONFIG_TSC_TIMER=n ?
Using the TSC in a virtual machine is problematic anyway, the
calibration can be _way_ off on a loaded host, this is why seabios
prefers the (fixed frequency) pmtimer.
cheers,
Gerd
- [Qemu-devel] Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller, John Snow, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Dr. David Alan Gilbert, 2019/08/20
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Dr. David Alan Gilbert, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller, Philippe Mathieu-Daudé, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller, Eduardo Habkost, 2019/08/20
- Re: [Qemu-devel] Regression with floppy drive controller,
Gerd Hoffmann <=
- Re: [Qemu-devel] Regression with floppy drive controller, Paolo Bonzini, 2019/08/21
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Kevin O'Connor, 2019/08/21
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Gerd Hoffmann, 2019/08/22
- Re: [Qemu-devel] [SeaBIOS] Re: Regression with floppy drive controller, Gerd Hoffmann, 2019/08/22