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authorPaul Mackerras <paulus@samba.org>2011-06-29 00:20:58 +0000
committerAvi Kivity <avi@redhat.com>2011-07-12 13:16:53 +0300
commit3c42bf8a717cb636e0ed2ed77194669e2ac3ed56 (patch)
tree4f543088e6a64ce7f1a771c1618668ff27752ecc /Documentation/robust-futex-ABI.txt
parent923c53caea446d246949c94703be83e68f251af7 (diff)
KVM: PPC: Split host-state fields out of kvmppc_book3s_shadow_vcpu
There are several fields in struct kvmppc_book3s_shadow_vcpu that temporarily store bits of host state while a guest is running, rather than anything relating to the particular guest or vcpu. This splits them out into a new kvmppc_host_state structure and modifies the definitions in asm-offsets.c to suit. On 32-bit, we have a kvmppc_host_state structure inside the kvmppc_book3s_shadow_vcpu since the assembly code needs to be able to get to them both with one pointer. On 64-bit they are separate fields in the PACA. This means that on 64-bit we don't need to copy the kvmppc_host_state in and out on vcpu load/unload, and in future will mean that the book3s_hv code doesn't need a shadow_vcpu struct in the PACA at all. That does mean that we have to be careful not to rely on any values persisting in the hstate field of the paca across any point where we could block or get preempted. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
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