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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
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;