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Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support |
Date: |
Fri, 20 Jun 2014 13:19:49 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Jun 20, 2014 at 12:38:30PM +0200, Paolo Bonzini wrote:
> Il 20/06/2014 11:10, Aurelien Jarno ha scritto:
> >> My idea was to add a machines-specific option umkernel=on, and require it
> >> in order to run KVM. Later we can add umkernel=on support for TCG as well,
> >> while umkernel=off with KVM requires virtualization extensions.
> >>
> >> The same option can disable pflash boot.
> >>
> >> What do you think?
> >
> >For what I understand the current KVM support in MIPS uses trap and
> >emulate and thus doesn't need hardware support, just a recent kernel
> >with the option enabled.
>
> Yes, but work to support virtualization extensions is underway.
> Patches were posted a few months ago.
>
> >That's why I do wonder if there is a real point
> >in supporting UM kernels in TCG mode.
>
> Debugging, mainly. It is sometimes useful to compare TCG with KVM
> on x86, and I suppose it could be the same on MIPS.
Ok, then we can indeed add a umkernel option, which is always enabled
with KVM, and which disable the flash (and why not other devices) in
that case.
At some point it might be a good idea to add a specific machine for
emulation/virtualization, like it is done on ARM, which do not have to
handle this kind of devices, and which does not have all the current
limitations of the Malta board.
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
address@hidden http://www.aurel32.net
- [Qemu-devel] [PATCH v5 06/12] kvm: Allow arch to set sigmask length, (continued)
- [Qemu-devel] [PATCH v5 06/12] kvm: Allow arch to set sigmask length, James Hogan, 2014/06/17
- [Qemu-devel] [PATCH v5 01/12] target-mips: Reset CPU timer consistently, James Hogan, 2014/06/17
- [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, James Hogan, 2014/06/17
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Aurelien Jarno, 2014/06/19
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Sanjay Lal, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Aurelien Jarno, 2014/06/19
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Paolo Bonzini, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, James Hogan, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Aurelien Jarno, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Paolo Bonzini, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support,
Aurelien Jarno <=
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, James Hogan, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, James Hogan, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Paolo Bonzini, 2014/06/20
- Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support, Aurelien Jarno, 2014/06/20
[Qemu-devel] [PATCH v5 09/12] hw/mips: In KVM mode, inject IRQ2 (I/O) interrupts via ioctls, James Hogan, 2014/06/17
[Qemu-devel] [PATCH v5 02/12] hw/mips/cputimer: Don't start periodic timer in KVM mode, James Hogan, 2014/06/17
[Qemu-devel] [PATCH v5 08/12] target-mips: Call kvm_mips_reset_vcpu() from mips_cpu_reset(), James Hogan, 2014/06/17
[Qemu-devel] [PATCH v5 04/12] target-mips: get_physical_address: Add defines for segment bases, James Hogan, 2014/06/17
Re: [Qemu-devel] [PATCH v5 00/12] KVM Support for MIPS32 Processors, Paolo Bonzini, 2014/06/18