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KVM: Provide userspace IO exit completion callback

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Current code assumes that IO exit was due to instruction emulation
and handles execution back to emulator directly. This patch adds new
userspace IO exit completion callback that can be set by any other code
that caused IO exit to userspace.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov
2012-09-03 15:24:26 +03:00
committed by Avi Kivity
parent 3b4dc3a031
commit 716d51abff
2 changed files with 56 additions and 36 deletions
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arch/x86/include/asm/kvm_host.h
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@@ -414,6 +414,7 @@ struct kvm_vcpu_arch {
struct x86_emulate_ctxt emulate_ctxt;
bool emulate_regs_need_sync_to_vcpu;
bool emulate_regs_need_sync_from_vcpu;
int (*complete_userspace_io)(struct kvm_vcpu *vcpu);
gpa_t time;
struct pvclock_vcpu_time_info hv_clock;