From 94f8e6418d3915dbefbb5d66b63146f1df12b0c0 Mon Sep 17 00:00:00 2001 From: Christoffer Dall Date: Sun, 20 Jan 2013 18:28:12 -0500 Subject: KVM: ARM: Handle guest faults in KVM Handles the guest faults in KVM by mapping in corresponding user pages in the 2nd stage page tables. We invalidate the instruction cache by MVA whenever we map a page to the guest (no, we cannot only do it when we have an iabt because the guest may happily read/write a page before hitting the icache) if the hardware uses VIPT or PIPT. In the latter case, we can invalidate only that physical page. In the first case, all bets are off and we simply must invalidate the whole affair. Not that VIVT icaches are tagged with vmids, and we are out of the woods on that one. Alexander Graf was nice enough to remind us of this massive pain. Reviewed-by: Will Deacon Reviewed-by: Marcelo Tosatti Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall --- arch/arm/include/asm/kvm_asm.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/include/asm/kvm_asm.h') diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h index f6652f6c5d84..5e06e8177784 100644 --- a/arch/arm/include/asm/kvm_asm.h +++ b/arch/arm/include/asm/kvm_asm.h @@ -71,6 +71,8 @@ extern char __kvm_hyp_vector[]; extern char __kvm_hyp_code_start[]; extern char __kvm_hyp_code_end[]; +extern void __kvm_tlb_flush_vmid(struct kvm *kvm); + extern void __kvm_flush_vm_context(void); extern void __kvm_tlb_flush_vmid(struct kvm *kvm); -- cgit v1.2.3