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hv:no need to use lock for the bit operations of local variable

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Use bitmap_set_nolock/bitmap_clear_nolock instead of
bitmap_set_lock/bitmap_clear_lock for the local variable.

Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Mingqiang Chi 2019-01-30 15:45:50 +08:00 committed by wenlingz
parent e2cb6acba6
commit 7da9161d7d
2 changed files with 10 additions and 10 deletions
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2
hypervisor/arch/x86/guest/guest.c
View File

@ -36,7 +36,7 @@ uint64_t vcpumask2pcpumask(struct acrn_vm *vm, uint64_t vdmask)
for (vcpu_id = 0U; vcpu_id < vm->hw.created_vcpus; vcpu_id++) {
if ((vdmask & (1UL << vcpu_id)) != 0UL) {
vcpu = vcpu_from_vid(vm, vcpu_id);
bitmap_set_lock(vcpu->pcpu_id, &dmask);
bitmap_set_nolock(vcpu->pcpu_id, &dmask);
}
}

18
hypervisor/arch/x86/guest/vlapic.c
View File

@ -135,7 +135,7 @@ vm_active_cpus(const struct acrn_vm *vm)
const struct acrn_vcpu *vcpu;
foreach_vcpu(i, vm, vcpu) {
bitmap_set_lock(vcpu->vcpu_id, &dmask);
bitmap_set_nolock(vcpu->vcpu_id, &dmask);
}
return dmask;
@ -1047,7 +1047,7 @@ vlapic_calcdest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys, b
*dmask = 0UL;
vcpu_id = vm_apicid2vcpu_id(vm, dest);
if (vcpu_id < vm->hw.created_vcpus) {
bitmap_set_lock(vcpu_id, dmask);
bitmap_set_nolock(vcpu_id, dmask);
}
} else {
/*
@ -1123,14 +1123,14 @@ vlapic_calcdest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys, b
/* target is the dest */
}
} else {
bitmap_set_lock(vcpu_id, dmask);
bitmap_set_nolock(vcpu_id, dmask);
}
}
}
}
if (lowprio && (target != NULL)) {
bitmap_set_lock(target->vcpu->vcpu_id, dmask);
bitmap_set_nolock(target->vcpu->vcpu_id, dmask);
}
}
}
@ -1159,7 +1159,7 @@ vlapic_calcdest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, boo
*dmask = 0UL;
vcpu_id = vm_apicid2vcpu_id(vm, dest);
if (vcpu_id < vm->hw.created_vcpus) {
bitmap_set_lock(vcpu_id, dmask);
bitmap_set_nolock(vcpu_id, dmask);
}
dev_dbg(ACRN_DBG_LAPICPT, "%s: phys destmod, dmask: 0x%016llx", __func__, *dmask);
} else {
@ -1179,7 +1179,7 @@ vlapic_calcdest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, boo
continue;
}
if ((dest_logical_id & logical_id) != 0U) {
bitmap_set_lock(vcpu_id, dmask);
bitmap_set_nolock(vcpu_id, dmask);
}
}
dev_dbg(ACRN_DBG_LAPICPT, "%s: logical destmod, dmask: 0x%016llx", __func__, *dmask);
@ -1322,14 +1322,14 @@ vlapic_icrlo_write_handler(struct acrn_vlapic *vlapic)
vlapic_calcdest(vlapic->vm, &dmask, dest, phys, false);
break;
case APIC_DEST_SELF:
bitmap_set_lock(vlapic->vcpu->vcpu_id, &dmask);
bitmap_set_nolock(vlapic->vcpu->vcpu_id, &dmask);
break;
case APIC_DEST_ALLISELF:
dmask = vm_active_cpus(vlapic->vm);
break;
case APIC_DEST_ALLESELF:
dmask = vm_active_cpus(vlapic->vm);
bitmap_clear_lock(vlapic->vcpu->vcpu_id, &dmask);
bitmap_clear_nolock(vlapic->vcpu->vcpu_id, &dmask);
break;
default:
/*
@ -1948,7 +1948,7 @@ vlapic_set_local_intr(struct acrn_vm *vm, uint16_t vcpu_id_arg, uint32_t vector)
if (vcpu_id == BROADCAST_CPU_ID) {
dmask = vm_active_cpus(vm);
} else {
bitmap_set_lock(vcpu_id, &dmask);
bitmap_set_nolock(vcpu_id, &dmask);
}
error = 0;
for (vcpu_id = 0U; vcpu_id < vm->hw.created_vcpus; vcpu_id++) {