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Subject[PATCH 25/39] KVM: MMU: Infer shadow root level in direct_map()
Date
From: Avi Kivity <avi@qumranet.com>

In all cases the shadow root level is available in mmu.shadow_root_level,
so there is no need to pass it as a parameter.

Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/mmu.c | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 3ee856f..72f739a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1227,11 +1227,11 @@ static void nonpaging_new_cr3(struct kvm_vcpu *vcpu)
}

static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
- int largepage, gfn_t gfn, pfn_t pfn,
- int level)
+ int largepage, gfn_t gfn, pfn_t pfn)
{
hpa_t table_addr = vcpu->arch.mmu.root_hpa;
int pt_write = 0;
+ int level = vcpu->arch.mmu.shadow_root_level;

for (; ; level--) {
u32 index = PT64_INDEX(v, level);
@@ -1299,8 +1299,7 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn)
if (mmu_notifier_retry(vcpu, mmu_seq))
goto out_unlock;
kvm_mmu_free_some_pages(vcpu);
- r = __direct_map(vcpu, v, write, largepage, gfn, pfn,
- PT32E_ROOT_LEVEL);
+ r = __direct_map(vcpu, v, write, largepage, gfn, pfn);
spin_unlock(&vcpu->kvm->mmu_lock);


@@ -1455,7 +1454,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa,
goto out_unlock;
kvm_mmu_free_some_pages(vcpu);
r = __direct_map(vcpu, gpa, error_code & PFERR_WRITE_MASK,
- largepage, gfn, pfn, kvm_x86_ops->get_tdp_level());
+ largepage, gfn, pfn);
spin_unlock(&vcpu->kvm->mmu_lock);

return r;
--
1.6.0.1


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