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KVM: ia64: enable external interrupt in vmm

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Currently, the interrupt enable bit is cleared when in
the vmm.  This patch sets the bit and the external interrupts can
be dealt with when in the vmm.  This improves the I/O performance.

Signed-off-by: Yang Zhang <yang.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Yang Zhang
2009-03-23 03:31:04 -04:00
committed by Avi Kivity
parent a8b876b1a4
commit 362c1055e5
3 changed files with 16 additions and 10 deletions
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5
arch/ia64/kvm/process.c
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@@ -652,20 +652,25 @@ void kvm_ia64_handle_break(unsigned long ifa, struct kvm_pt_regs *regs,
unsigned long isr, unsigned long iim)
{
struct kvm_vcpu *v = current_vcpu;
long psr;
if (ia64_psr(regs)->cpl == 0) {
/* Allow hypercalls only when cpl = 0. */
if (iim == DOMN_PAL_REQUEST) {
local_irq_save(psr);
set_pal_call_data(v);
vmm_transition(v);
get_pal_call_result(v);
vcpu_increment_iip(v);
local_irq_restore(psr);
return;
} else if (iim == DOMN_SAL_REQUEST) {
local_irq_save(psr);
set_sal_call_data(v);
vmm_transition(v);
get_sal_call_result(v);
vcpu_increment_iip(v);
local_irq_restore(psr);
return;
}
}