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KVM: ia64: enable external interrupt in vmm 

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
View File

@ -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;
}
}

18
arch/ia64/kvm/vmm_ivt.S
View File

@ -95,7 +95,7 @@ GLOBAL_ENTRY(kvm_vmm_panic)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@ -249,7 +249,7 @@ ENTRY(kvm_break_fault)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15)ssm psr.i // restore psr.i
(p15)ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@ -439,7 +439,7 @@ kvm_dispatch_vexirq:
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.i
adds r3=8,r2 // set up second base pointer
;;
KVM_SAVE_REST
@ -819,7 +819,7 @@ ENTRY(kvm_dtlb_miss_dispatch)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
@ -842,7 +842,7 @@ ENTRY(kvm_itlb_miss_dispatch)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@ -871,7 +871,7 @@ ENTRY(kvm_dispatch_reflection)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@ -898,7 +898,7 @@ ENTRY(kvm_dispatch_virtualization_fault)
;;
srlz.i // guarantee that interruption collection is on
;;
//(p15) ssm psr.i // restore psr.i
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
@ -920,7 +920,7 @@ ENTRY(kvm_dispatch_interrupt)
;;
srlz.i
;;
//(p15) ssm psr.i
(p15) ssm psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@ -1333,7 +1333,7 @@ hostret = r24
;;
(p7) srlz.i
;;
//(p6) ssm psr.i
(p6) ssm psr.i
;;
mov rp=rpsave
mov ar.pfs=pfssave

3
arch/ia64/kvm/vtlb.c
View File

@ -254,7 +254,8 @@ u64 guest_vhpt_lookup(u64 iha, u64 *pte)
"(p7) st8 [%2]=r9;;"
"ssm psr.ic;;"
"srlz.d;;"
/* "ssm psr.i;;" Once interrupts in vmm open, need fix*/
"ssm psr.i;;"
"srlz.d;;"
: "=r"(ret) : "r"(iha), "r"(pte):"memory");
return ret;