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[RESEND,2/3] kvm, tdp: calculate correct base gfn for non-DIR level

Message ID 4BFCE059.60502@cn.fujitsu.com (mailing list archive)
State New, archived
Headers show

Commit Message

Lai Jiangshan May 26, 2010, 8:48 a.m. UTC
None
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Patch

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index a5c6719..6986a6f 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1955,7 +1956,10 @@  static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
 		}
 
 		if (*iterator.sptep == shadow_trap_nonpresent_pte) {
-			pseudo_gfn = (iterator.addr & PT64_DIR_BASE_ADDR_MASK) >> PAGE_SHIFT;
+			u64 base_addr = iterator.addr;
+
+			base_addr &= PT64_LVL_ADDR_MASK(iterator.level);
+			pseudo_gfn = base_addr >> PAGE_SHIFT;
 			sp = kvm_mmu_get_page(vcpu, pseudo_gfn, iterator.addr,
 					      iterator.level - 1,
 					      1, ACC_ALL, iterator.sptep);