Am 27.06.2010 um 10:24 schrieb Avi Kivity [off-list ref]:

On 06/26/2010 02:25 AM, Alexander Graf wrote:

quoted

We will be introducing a method to project the shared page in guest  
context.
As soon as we're talking about this coupling, the shared page is  
colled magic
page.

This patch introduces simple defines, so the follow-up patches are  
easier to
read.

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/ 

include/asm/kvm_host.h
index e35c1ac..5f8c214 100644

--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h

@@ -285,6 +285,8 @@ struct kvm_vcpu_arch {
     u64 dec_jiffies;
     unsigned long pending_exceptions;
     struct kvm_vcpu_arch_shared *shared;
+    unsigned long magic_page_pa; /* phys addr to map the magic  

page to */
+    unsigned long magic_page_ea; /* effect. addr to map the magic  
page to */

Is ea like a va?  If so, can't the guest specify it by manipulating  
the hash table (or tlb)?

ea in ppc speech is va in x86 speech. Yes, the guest could map it  
itself, but I couldn't find out how. This way I at least know what's  
happening :).


Alex