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| author | Mohammed Gamal <m.gamal005@gmail.com> | 2010-09-19 14:34:06 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:53:01 +0200 |
| commit | 63995653ade16deacaea5b49ceaf6376314593ac (patch) | |
| tree | 92c4dc379a1c8925a53ce6d6abd5d4d0f85ecc49 | |
| parent | KVM: x86 emulator: Expose emulate_int_real() (diff) | |
| download | linux-63995653ade16deacaea5b49ceaf6376314593ac.tar.xz linux-63995653ade16deacaea5b49ceaf6376314593ac.zip | |
KVM: Add kvm_inject_realmode_interrupt() wrapper
This adds a wrapper function kvm_inject_realmode_interrupt() around the
emulator function emulate_int_real() to allow real mode interrupt injection.
[avi: initialize operand and address sizes before emulating interrupts]
[avi: initialize rip for real mode interrupt injection]
[avi: clear interrupt pending flag after emulating interrupt injection]
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/x86.c | 29 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.h | 1 |
2 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 3adf6921e88e..7d2880500fa3 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4188,6 +4188,35 @@ static void init_emulate_ctxt(struct kvm_vcpu *vcpu) memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); } +int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq) +{ + struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; + int ret; + + init_emulate_ctxt(vcpu); + + vcpu->arch.emulate_ctxt.decode.op_bytes = 2; + vcpu->arch.emulate_ctxt.decode.ad_bytes = 2; + vcpu->arch.emulate_ctxt.decode.eip = vcpu->arch.emulate_ctxt.eip; + ret = emulate_int_real(&vcpu->arch.emulate_ctxt, &emulate_ops, irq); + + if (ret != X86EMUL_CONTINUE) + return EMULATE_FAIL; + + vcpu->arch.emulate_ctxt.eip = c->eip; + memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); + kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); + kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); + + if (irq == NMI_VECTOR) + vcpu->arch.nmi_pending = false; + else + vcpu->arch.interrupt.pending = false; + + return EMULATE_DONE; +} +EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); + static int handle_emulation_failure(struct kvm_vcpu *vcpu) { ++vcpu->stat.insn_emulation_fail; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index bf4dc2f40d7f..2cea414489f3 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -72,6 +72,7 @@ static inline int is_paging(struct kvm_vcpu *vcpu) void kvm_before_handle_nmi(struct kvm_vcpu *vcpu); void kvm_after_handle_nmi(struct kvm_vcpu *vcpu); +int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq); void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data); |