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KVM: x86: do not execute halted vcpus

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Offline or uninitialized vcpu's can be executed if requested to perform
userspace work.

Follow Avi's suggestion to handle halted vcpu's in the main loop,
simplifying kvm_emulate_halt(). Introduce a new vcpu->requests bit to
indicate events that promote state from halted to running.

Also standardize vcpu wake sites.

Signed-off-by: Marcelo Tosatti <mtosatti <at> redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti 2008-09-08 15:23:48 -03:00 • committed by Avi Kivity
parent a6a3034cb9
commit d76901750a
5 changed files with 69 additions and 67 deletions
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1
include/linux/kvm_host.h
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@ -34,6 +34,7 @@
#define KVM_REQ_MMU_RELOAD 3
#define KVM_REQ_TRIPLE_FAULT 4
#define KVM_REQ_PENDING_TIMER 5
#define KVM_REQ_UNHALT 6
struct kvm_vcpu;
extern struct kmem_cache *kvm_vcpu_cache;