KVM: ppc: fix invalidation of large guest pages

When guest invalidates a large tlb map, there may be more than one
corresponding shadow tlb maps that need to be invalidated. Use eaddr and eend
to find these shadow tlb maps.

Signed-off-by: Liu Yu <[e-mail]>
Signed-off-by: Hollis Blanchard <[e-mail]>
Signed-off-by: Avi Kivity <[e-mail]>

arch/powerpc/kvm/44x_tlb.c

···
 	                                            vcpu->arch.msr & MSR_PR);
 }
 
-void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, u64 eaddr, u64 asid)
+void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
+                           gva_t eend, u32 asid)
 {
 	unsigned int pid = asid & 0xff;
 	int i;
···
 		if (!get_tlb_v(stlbe))
 			continue;
 
-		if (eaddr < get_tlb_eaddr(stlbe))
+		if (eend < get_tlb_eaddr(stlbe))
 			continue;
 
 		if (eaddr > get_tlb_end(stlbe))

arch/powerpc/kvm/emulate.c

···
 	if (tlbe->word0 & PPC44x_TLB_VALID) {
 		eaddr = get_tlb_eaddr(tlbe);
 		asid = (tlbe->word0 & PPC44x_TLB_TS) | tlbe->tid;
-		kvmppc_mmu_invalidate(vcpu, eaddr, asid);
+		kvmppc_mmu_invalidate(vcpu, eaddr, get_tlb_end(tlbe), asid);
 	}
 
 	switch (ws) {

include/asm-powerpc/kvm_ppc.h

···
 
 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
                            u64 asid, u32 flags);
-extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, u64 eaddr, u64 asid);
+extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
+                                  gva_t eend, u32 asid);
 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 
 extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);