Messages in this thread | | | Subject | Re: [kvm-devel] [PATCH 01/15] KVM: Use a shared page for kernel/user communication when runing a vcpu | From | Hollis Blanchard <> | Date | Wed, 14 Mar 2007 22:09:23 -0500 |
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On Wed, 2007-03-14 at 21:38 -0500, Hollis Blanchard wrote: > On Sun, 2007-03-11 at 15:53 +0200, Avi Kivity wrote: > > Instead of passing a 'struct kvm_run' back and forth between the > > kernel and userspace, allocate a page and allow the user to mmap() it. > > This reduces needless copying and makes the interface expandable by > > providing lots of free space. > > Do you provide for another means of accessing guest memory from host > userspace? For example, how do you attach a host debugger to the guest? > > Xen uses an ioctl followed by mmap for this purpose, which is why I > wonder about using mmap(/dev/kvm) for another purpose.
Never mind: I see now that you have separate device nodes for the VM vs each vcpu.
-Hollis
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