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Re: [Qemu-devel] Re: Question about KVM and PC speaker

From: Jan Kiszka
Subject: Re: [Qemu-devel] Re: Question about KVM and PC speaker
Date: Thu, 23 Apr 2009 11:33:27 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv: Gecko/20080226 SUSE/ Thunderbird/ Mnenhy/

Samuel Thibault wrote:
> Jan Kiszka, le Thu 23 Apr 2009 11:15:46 +0200, a écrit :
>> that's consistent with QEMU code: there is no handling of port 0x61 in
>> user space,
> ? I can see it in hw/pcspkr.c
>> Doing beep via the BIOS is surely another to-do, and a useful hint in
>> this context. But unless you add a paravirt firmware beep channel or
>> BIOS support for sound cards or, and that' probably the best approach,
>> PC speaker emulation, how should the beep be emitted?
> I thought the PC speaker emulation was already implemented in
> hw/pcspkr.c..

Huh, it is! Then the problem is a KVM-only thing: The kernel part hooks
onto those resources but doesn't communicate changes to this user space


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