From: Avi Kivity <avi@redhat.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: "Nadav Har'El" <nyh@math.technion.ac.il>,
Gleb Natapov <gleb@redhat.com>,
kvm@vger.kernel.org, abelg@il.ibm.com
Subject: Re: [PATCH 0/30] nVMX: Nested VMX, v9
Date: Mon, 23 May 2011 18:19:54 +0300 [thread overview]
Message-ID: <4DDA7B1A.7060403@redhat.com> (raw)
In-Reply-To: <20110523145855.GF23407@8bytes.org>
On 05/23/2011 05:58 PM, Joerg Roedel wrote:
> On Mon, May 23, 2011 at 05:34:20PM +0300, Avi Kivity wrote:
> > On 05/23/2011 05:28 PM, Joerg Roedel wrote:
>
> >> To user-space we can provide a VCPU_FREEZE/VCPU_UNFREEZE ioctl which
> >> does all the necessary things.
> >
> > Or we can automatically flush things on any exit to userspace. They
> > should be very rare in guest mode.
>
> This would make nesting mostly transparent to migration, so it sounds
> good in this regard.
>
> I do not completly agree that user-space exits in guest-mode are rare,
> this depends on the hypervisor in the L1. In Hyper-V for example the
> root-domain uses hardware virtualization too and has direct access to
> devices (at least to some degree). IOIO is not intercepted in the
> root-domain, for example. Not sure about the MMIO regions.
Good point. We were also talking about passing through virtio (or even
host) devices to the guest.
So an ioctl to flush volatile state to memory would be a good idea.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-05-23 15:20 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-08 8:15 [PATCH 0/30] nVMX: Nested VMX, v9 Nadav Har'El
2011-05-08 8:15 ` [PATCH 01/30] nVMX: Add "nested" module option to kvm_intel Nadav Har'El
2011-05-08 8:16 ` [PATCH 02/30] nVMX: Implement VMXON and VMXOFF Nadav Har'El
2011-05-08 8:16 ` [PATCH 03/30] nVMX: Allow setting the VMXE bit in CR4 Nadav Har'El
2011-05-08 8:17 ` [PATCH 04/30] nVMX: Introduce vmcs12: a VMCS structure for L1 Nadav Har'El
2011-05-08 8:17 ` [PATCH 05/30] nVMX: Implement reading and writing of VMX MSRs Nadav Har'El
2011-05-08 8:18 ` [PATCH 06/30] nVMX: Decoding memory operands of VMX instructions Nadav Har'El
2011-05-09 9:47 ` Avi Kivity
2011-05-08 8:18 ` [PATCH 07/30] nVMX: Introduce vmcs02: VMCS used to run L2 Nadav Har'El
2011-05-16 15:30 ` Marcelo Tosatti
2011-05-16 18:32 ` Nadav Har'El
2011-05-17 13:20 ` Marcelo Tosatti
2011-05-08 8:19 ` [PATCH 08/30] nVMX: Fix local_vcpus_link handling Nadav Har'El
2011-05-08 8:19 ` [PATCH 09/30] nVMX: Add VMCS fields to the vmcs12 Nadav Har'El
2011-05-08 8:20 ` [PATCH 10/30] nVMX: Success/failure of VMX instructions Nadav Har'El
2011-05-08 8:20 ` [PATCH 11/30] nVMX: Implement VMCLEAR Nadav Har'El
2011-05-08 8:21 ` [PATCH 12/30] nVMX: Implement VMPTRLD Nadav Har'El
2011-05-16 14:34 ` Marcelo Tosatti
2011-05-16 18:58 ` Nadav Har'El
2011-05-16 19:09 ` Nadav Har'El
2011-05-08 8:21 ` [PATCH 13/30] nVMX: Implement VMPTRST Nadav Har'El
2011-05-08 8:22 ` [PATCH 14/30] nVMX: Implement VMREAD and VMWRITE Nadav Har'El
2011-05-08 8:22 ` [PATCH 15/30] nVMX: Move host-state field setup to a function Nadav Har'El
2011-05-09 9:56 ` Avi Kivity
2011-05-09 10:40 ` Nadav Har'El
2011-05-08 8:23 ` [PATCH 16/30] nVMX: Move control field setup to functions Nadav Har'El
2011-05-08 8:23 ` [PATCH 17/30] nVMX: Prepare vmcs02 from vmcs01 and vmcs12 Nadav Har'El
2011-05-09 10:12 ` Avi Kivity
2011-05-09 10:27 ` Nadav Har'El
2011-05-09 10:45 ` Avi Kivity
2011-05-08 8:24 ` [PATCH 18/30] nVMX: Implement VMLAUNCH and VMRESUME Nadav Har'El
2011-05-08 8:24 ` [PATCH 19/30] nVMX: No need for handle_vmx_insn function any more Nadav Har'El
2011-05-08 8:25 ` [PATCH 20/30] nVMX: Exiting from L2 to L1 Nadav Har'El
2011-05-09 10:45 ` Avi Kivity
2011-05-08 8:25 ` [PATCH 21/30] nVMX: Deciding if L0 or L1 should handle an L2 exit Nadav Har'El
2011-05-08 8:26 ` [PATCH 22/30] nVMX: Correct handling of interrupt injection Nadav Har'El
2011-05-09 10:57 ` Avi Kivity
2011-05-08 8:27 ` [PATCH 23/30] nVMX: Correct handling of exception injection Nadav Har'El
2011-05-08 8:27 ` [PATCH 24/30] nVMX: Correct handling of idt vectoring info Nadav Har'El
2011-05-09 11:04 ` Avi Kivity
2011-05-08 8:28 ` [PATCH 25/30] nVMX: Handling of CR0 and CR4 modifying instructions Nadav Har'El
2011-05-08 8:28 ` [PATCH 26/30] nVMX: Further fixes for lazy FPU loading Nadav Har'El
2011-05-08 8:29 ` [PATCH 27/30] nVMX: Additional TSC-offset handling Nadav Har'El
2011-05-09 17:27 ` Zachary Amsden
2011-05-08 8:29 ` [PATCH 28/30] nVMX: Add VMX to list of supported cpuid features Nadav Har'El
2011-05-08 8:30 ` [PATCH 29/30] nVMX: Miscellenous small corrections Nadav Har'El
2011-05-08 8:30 ` [PATCH 30/30] nVMX: Documentation Nadav Har'El
2011-05-09 11:18 ` [PATCH 0/30] nVMX: Nested VMX, v9 Avi Kivity
2011-05-09 11:37 ` Nadav Har'El
2011-05-11 8:20 ` Gleb Natapov
2011-05-12 15:42 ` Nadav Har'El
2011-05-12 15:57 ` Gleb Natapov
2011-05-12 16:08 ` Avi Kivity
2011-05-12 16:14 ` Gleb Natapov
2011-05-12 16:31 ` Nadav Har'El
2011-05-12 16:51 ` Gleb Natapov
2011-05-12 17:00 ` Avi Kivity
2011-05-15 23:11 ` Nadav Har'El
2011-05-16 6:38 ` Gleb Natapov
2011-05-16 7:44 ` Nadav Har'El
2011-05-16 7:57 ` Gleb Natapov
2011-05-16 9:50 ` Avi Kivity
2011-05-16 10:20 ` Avi Kivity
2011-05-22 19:32 ` Nadav Har'El
2011-05-23 9:37 ` Joerg Roedel
2011-05-23 9:52 ` Avi Kivity
2011-05-23 13:02 ` Joerg Roedel
2011-05-23 13:08 ` Avi Kivity
2011-05-23 13:40 ` Joerg Roedel
2011-05-23 13:52 ` Avi Kivity
2011-05-23 14:10 ` Nadav Har'El
2011-05-23 14:32 ` Avi Kivity
2011-05-23 14:44 ` Nadav Har'El
2011-05-23 15:23 ` Avi Kivity
2011-05-23 18:06 ` Alexander Graf
2011-05-24 11:09 ` Avi Kivity
2011-05-24 13:07 ` Joerg Roedel
2011-05-23 14:28 ` Joerg Roedel
2011-05-23 14:34 ` Avi Kivity
2011-05-23 14:58 ` Joerg Roedel
2011-05-23 15:19 ` Avi Kivity [this message]
2011-05-23 13:18 ` Nadav Har'El
2011-05-12 16:18 ` Avi Kivity
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