+To find out if we're running on KVM or not, we overlay the PVR
register. Usually
+the PVR register contains an id that identifies your CPU type. If,
however, you
+pass KVM_PVR_PARA in the register that you want the PVR result in,
the register
+still contains KVM_PVR_PARA after the mfpvr call.
+
+ LOAD_REG_IMM(r5, KVM_PVR_PARA)
+ mfpvr r5
+ [r5 still contains KVM_PVR_PARA]
I love this part :-)
+ __u64 scratch3;
+ __u64 critical; /* Guest may not get interrupts if == r1 */
+ __u64 sprg0;
+ __u64 sprg1;
+ __u64 sprg2;
+ __u64 sprg3;
+ __u64 srr0;
+ __u64 srr1;
+ __u64 dar;
+ __u64 msr;
+ __u32 dsisr;
+ __u32 int_pending; /* Tells the guest if we have an interrupt */
+};
+
+Additions to the page must only occur at the end. Struct fields
are always 32
+bit aligned.
The u64s are 64-bit aligned, should they always be?
+The "ld" and "std" instructions are transormed to "lwz" and "stw"
instructions
+respectively on 32 bit systems with an added offset of 4 to
accomodate for big
+endianness.
Will this add never overflow? Is there anything that checks for it?
+mtmsrd rX, 0 b <special mtmsr section>
+mtmsr b <special mtmsr section>
mtmsr rX
Segher
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