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| author | Mohammed Gamal <m.gamal005@gmail.com> | 2008-08-17 15:47:05 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:20 +0200 |
| commit | ea953ef0ca84e778187905177e2a789a1974837b (patch) | |
| tree | 01a4b64c05382f978274b8d3e87a0a5334998073 /arch/x86/kvm | |
| parent | KVM: VMX: Add module parameter and emulation flag. (diff) | |
| download | linux-ea953ef0ca84e778187905177e2a789a1974837b.tar.xz linux-ea953ef0ca84e778187905177e2a789a1974837b.zip | |
KVM: VMX: Add invalid guest state handler
This adds the invalid guest state handler function which invokes the x86
emulator until getting the guest to a VMX-friendly state.
[avi: leave atomic context if scheduling]
[guillaume: return to atomic context correctly]
Signed-off-by: Laurent Vivier <laurent.vivier@bull.net>
Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 7c5f611e1a94..eae1f2c64f97 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2892,6 +2892,43 @@ static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 1; } +static void handle_invalid_guest_state(struct kvm_vcpu *vcpu, + struct kvm_run *kvm_run) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + int err; + + preempt_enable(); + local_irq_enable(); + + while (!guest_state_valid(vcpu)) { + err = emulate_instruction(vcpu, kvm_run, 0, 0, 0); + + switch (err) { + case EMULATE_DONE: + break; + case EMULATE_DO_MMIO: + kvm_report_emulation_failure(vcpu, "mmio"); + /* TODO: Handle MMIO */ + return; + default: + kvm_report_emulation_failure(vcpu, "emulation failure"); + return; + } + + if (signal_pending(current)) + break; + if (need_resched()) + schedule(); + } + + local_irq_disable(); + preempt_disable(); + + /* Guest state should be valid now, no more emulation should be needed */ + vmx->emulation_required = 0; +} + /* * The exit handlers return 1 if the exit was handled fully and guest execution * may resume. Otherwise they set the kvm_run parameter to indicate what needs |