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authorGlauber Costa <glommer@redhat.com>2009-05-12 16:21:05 -0400
committerAvi Kivity <avi@redhat.com>2009-06-10 11:48:54 +0300
commit2809f5d2c4cfad171167b131bb2a21ab65eba40f (patch)
treeeee772c1476fb05ababf306d6458f4ccd8b8412a /arch/x86/kvm/vmx.c
parent547de29e5b1662deb05b5f90917902dc0e9ac182 (diff)
KVM: Replace ->drop_interrupt_shadow() by ->set_interrupt_shadow()
This patch replaces drop_interrupt_shadow with the more general set_interrupt_shadow, that can either drop or raise it, depending on its parameter. It also adds ->get_interrupt_shadow() for future use. Signed-off-by: Glauber Costa <glommer@redhat.com> CC: H. Peter Anvin <hpa@zytor.com> CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
-rw-r--r--arch/x86/kvm/vmx.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e8a5649f9c1..f3ab27b5a6b 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -736,23 +736,45 @@ static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
vmcs_writel(GUEST_RFLAGS, rflags);
}
+static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
+{
+ u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
+ int ret = 0;
+
+ if (interruptibility & GUEST_INTR_STATE_STI)
+ ret |= X86_SHADOW_INT_STI;
+ if (interruptibility & GUEST_INTR_STATE_MOV_SS)
+ ret |= X86_SHADOW_INT_MOV_SS;
+
+ return ret & mask;
+}
+
+static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
+{
+ u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
+ u32 interruptibility = interruptibility_old;
+
+ interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
+
+ if (mask & X86_SHADOW_INT_MOV_SS)
+ interruptibility |= GUEST_INTR_STATE_MOV_SS;
+ if (mask & X86_SHADOW_INT_STI)
+ interruptibility |= GUEST_INTR_STATE_STI;
+
+ if ((interruptibility != interruptibility_old))
+ vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
+}
+
static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
unsigned long rip;
- u32 interruptibility;
rip = kvm_rip_read(vcpu);
rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
kvm_rip_write(vcpu, rip);
- /*
- * We emulated an instruction, so temporary interrupt blocking
- * should be removed, if set.
- */
- interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
- if (interruptibility & 3)
- vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
- interruptibility & ~3);
+ /* skipping an emulated instruction also counts */
+ vmx_set_interrupt_shadow(vcpu, 0);
}
static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
@@ -2400,12 +2422,6 @@ out:
return ret;
}
-void vmx_drop_interrupt_shadow(struct kvm_vcpu *vcpu)
-{
- vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
- GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
-}
-
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
@@ -3649,6 +3665,8 @@ static struct kvm_x86_ops vmx_x86_ops = {
.run = vmx_vcpu_run,
.handle_exit = vmx_handle_exit,
.skip_emulated_instruction = skip_emulated_instruction,
+ .set_interrupt_shadow = vmx_set_interrupt_shadow,
+ .get_interrupt_shadow = vmx_get_interrupt_shadow,
.patch_hypercall = vmx_patch_hypercall,
.set_irq = vmx_inject_irq,
.set_nmi = vmx_inject_nmi,
@@ -3658,7 +3676,6 @@ static struct kvm_x86_ops vmx_x86_ops = {
.enable_nmi_window = enable_nmi_window,
.enable_irq_window = enable_irq_window,
.update_cr8_intercept = update_cr8_intercept,
- .drop_interrupt_shadow = vmx_drop_interrupt_shadow,
.set_tss_addr = vmx_set_tss_addr,
.get_tdp_level = get_ept_level,