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Code Issues Releases Activity

Set "Interrupt Window Exiting" in the case where there is a vector to be

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injected into the vcpu but the VM-entry interruption information field
already has the valid bit set.

Pointed out by:	David Reed (david.reed@tidalscale.com)
This commit is contained in:
Neel Natu 2014-01-23 06:06:50 +00:00
parent e6eb55f346
commit 36736912b6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=261074
1 changed files with 28 additions and 9 deletions
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37
sys/amd64/vmm/intel/vmx.c
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@ -1121,15 +1121,15 @@ vmx_inject_interrupts(struct vmx *vmx, int vcpu, struct vlapic *vlapic)
}
/*
* If there is already an interrupt pending then just return. This
* could happen for multiple reasons:
* - A vectoring VM-entry was aborted due to astpending or rendezvous.
* - A VM-exit happened during event injection.
* - A NMI was injected above or after "NMI window exiting" VM-exit.
* If interrupt-window exiting is already in effect then don't bother
* checking for pending interrupts. This is just an optimization and
* not needed for correctness.
*/
info = vmcs_read(VMCS_ENTRY_INTR_INFO);
if (info & VMCS_INTR_VALID)
if ((vmx->cap[vcpu].proc_ctls & PROCBASED_INT_WINDOW_EXITING) != 0) {
VCPU_CTR0(vmx->vm, vcpu, "Skip interrupt injection due to "
"pending int_window_exiting");
return;
}
/* Ask the local apic for a vector to inject */
if (!vlapic_pending_intr(vlapic, &vector))
@ -1139,12 +1139,31 @@ vmx_inject_interrupts(struct vmx *vmx, int vcpu, struct vlapic *vlapic)
/* Check RFLAGS.IF and the interruptibility state of the guest */
rflags = vmcs_read(VMCS_GUEST_RFLAGS);
if ((rflags & PSL_I) == 0)
if ((rflags & PSL_I) == 0) {
VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to "
"rflags %#lx", vector, rflags);
goto cantinject;
}
gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY);
if (gi & HWINTR_BLOCKING)
if (gi & HWINTR_BLOCKING) {
VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to "
"Guest Interruptibility-state %#x", vector, gi);
goto cantinject;
}
info = vmcs_read(VMCS_ENTRY_INTR_INFO);
if (info & VMCS_INTR_VALID) {
/*
* This is expected and could happen for multiple reasons:
* - A vectoring VM-entry was aborted due to astpending
* - A VM-exit happened during event injection.
* - An NMI was injected above or after "NMI window exiting"
*/
VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to "
"VM-entry intr info %#x", vector, info);
goto cantinject;
}
/* Inject the interrupt */
info = VMCS_INTR_T_HWINTR | VMCS_INTR_VALID;