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KVM: x86: Remove useless regs_page pointer from kvm_lapic 

Access to this page is mostly done through the regs member which holds
the address to this page.  The exceptions are in vmx_vcpu_reset() and
kvm_free_lapic() and these both can easily be converted to using regs.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
hifive-unleashed-5.1
Takuya Yoshikawa 2011-03-05 12:40:20 +09:00 committed by Marcelo Tosatti
parent c8ce057eaf
commit afc20184b7
3 changed files with 5 additions and 7 deletions
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9
arch/x86/kvm/lapic.c
View File

@ -871,8 +871,8 @@ void kvm_free_lapic(struct kvm_vcpu *vcpu)
hrtimer_cancel(&vcpu->arch.apic->lapic_timer.timer);
if (vcpu->arch.apic->regs_page)
__free_page(vcpu->arch.apic->regs_page);
if (vcpu->arch.apic->regs)
free_page((unsigned long)vcpu->arch.apic->regs);
kfree(vcpu->arch.apic);
}
@ -1061,13 +1061,12 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
vcpu->arch.apic = apic;
apic->regs_page = alloc_page(GFP_KERNEL|__GFP_ZERO);
if (apic->regs_page == NULL) {
apic->regs = (void *)get_zeroed_page(GFP_KERNEL);
if (!apic->regs) {
printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
vcpu->vcpu_id);
goto nomem_free_apic;
}
apic->regs = page_address(apic->regs_page);
apic->vcpu = vcpu;
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,

1
arch/x86/kvm/lapic.h
View File

@ -13,7 +13,6 @@ struct kvm_lapic {
u32 divide_count;
struct kvm_vcpu *vcpu;
bool irr_pending;
struct page *regs_page;
void *regs;
gpa_t vapic_addr;
struct page *vapic_page;

2
arch/x86/kvm/vmx.c
View File

@ -2821,7 +2821,7 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
if (vm_need_tpr_shadow(vmx->vcpu.kvm))
vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
page_to_phys(vmx->vcpu.arch.apic->regs_page));
__pa(vmx->vcpu.arch.apic->regs));
vmcs_write32(TPR_THRESHOLD, 0);
}