diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-11-22 11:30:47 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 17:53:00 +0200 |
| commit | 1155f76a8166ae6fc88e7d73eb6817eb9012d476 (patch) | |
| tree | becc954dacc6098f9c60bc52d572ca8179e070e4 /drivers/kvm/vmx.c | |
| parent | 9c5623e3e42e94927d02a6693875badf15692970 (diff) | |
KVM: VMX: Read & store IDT_VECTORING_INFO_FIELD
We'll want to write to it in order to fix real-mode irq injection problems,
but it is a read-only field. Storing it in a variable solves that issue.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/vmx.c')
| -rw-r--r-- | drivers/kvm/vmx.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index d2c25e25d3a..f045f4005ea 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -48,6 +48,7 @@ struct vcpu_vmx { struct kvm_vcpu vcpu; int launched; u8 fail; + u32 idt_vectoring_info; struct kvm_msr_entry *guest_msrs; struct kvm_msr_entry *host_msrs; int nmsrs; @@ -863,9 +864,10 @@ static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) static int vmx_get_irq(struct kvm_vcpu *vcpu) { + struct vcpu_vmx *vmx = to_vmx(vcpu); u32 idtv_info_field; - idtv_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD); + idtv_info_field = vmx->idt_vectoring_info; if (idtv_info_field & INTR_INFO_VALID_MASK) { if (is_external_interrupt(idtv_info_field)) return idtv_info_field & VECTORING_INFO_VECTOR_MASK; @@ -1817,12 +1819,13 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu, static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { + struct vcpu_vmx *vmx = to_vmx(vcpu); u32 intr_info, error_code; unsigned long cr2, rip; u32 vect_info; enum emulation_result er; - vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); + vect_info = vmx->idt_vectoring_info; intr_info = vmcs_read32(VM_EXIT_INTR_INFO); if ((vect_info & VECTORING_INFO_VALID_MASK) && @@ -2171,9 +2174,9 @@ static const int kvm_vmx_max_exit_handlers = */ static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { - u32 vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); u32 exit_reason = vmcs_read32(VM_EXIT_REASON); struct vcpu_vmx *vmx = to_vmx(vcpu); + u32 vectoring_info = vmx->idt_vectoring_info; if (unlikely(vmx->fail)) { kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; @@ -2228,6 +2231,7 @@ static void enable_irq_window(struct kvm_vcpu *vcpu) static void vmx_intr_assist(struct kvm_vcpu *vcpu) { + struct vcpu_vmx *vmx = to_vmx(vcpu); u32 idtv_info_field, intr_info_field; int has_ext_irq, interrupt_window_open; int vector; @@ -2236,7 +2240,7 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) has_ext_irq = kvm_cpu_has_interrupt(vcpu); intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); - idtv_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD); + idtv_info_field = vmx->idt_vectoring_info; if (intr_info_field & INTR_INFO_VALID_MASK) { if (idtv_info_field & INTR_INFO_VALID_MASK) { /* TODO: fault when IDT_Vectoring */ @@ -2396,6 +2400,8 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) #endif ); + vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); + vcpu->interrupt_window_open = (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; @@ -2413,7 +2419,8 @@ static void vmx_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, u32 err_code) { - u32 vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); + struct vcpu_vmx *vmx = to_vmx(vcpu); + u32 vect_info = vmx->idt_vectoring_info; ++vcpu->stat.pf_guest; |