Re: [Xen-devel] [PATCH v3] Nested VMX: CR emulation fix up

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.12.13 at 08:54, Yang Zhang <yang.z.zhang@xxxxxxxxx> wrote:
> From: Yang Zhang <yang.z.zhang@xxxxxxxxx>
> 
> This patch fixs two issues:
> 1. The CR_READ_SHADOW should only cover the value that L2 wirtes to
> CR when L2 is running. But currently, L0 wirtes wrong value to
> it during virtual vmentry and L2's CR access emualtion.
> 
> 2. L2 changed cr[0/4] in a way that did not change any of L1's shadowed
> bits, but did change L0 shadowed bits. In this case, the effective cr[0/4]
> value that L1 would like to write into the hardware is consist of
> the L2-owned bits from the new value combined with the L1-owned bits
> from L1's guest cr[0/4].
> 
> Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
> ---

It's been a while since v2 was sent, so please tell us what has
changed since then and why. That's make reviewing quite a bit
easier.

Jan


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