From: James Hogan <james.hogan@imgtec.com>
Date: Tue, 14 Jun 2016 08:40:16 +0000 (+0100)
Subject: MIPS: KVM: Dump guest tlbs if kvm_get_inst() fails
X-Git-Tag: v4.8-rc1~60^2~113
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=eafc4ed206c562d205de9d2acf40d57616faaf03;p=linux.git

MIPS: KVM: Dump guest tlbs if kvm_get_inst() fails

If kvm_get_inst() fails to find a guest TLB mapping for the guest PC
then dump the guest TLB entries. The contents of the guest TLB is likely
to be more interesting than the host TLB entries.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index 208f70409ccb..2f494ec5c939 100644
--- a/arch/mips/kvm/mmu.c
+++ b/arch/mips/kvm/mmu.c
@@ -346,6 +346,7 @@ u32 kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu)
 				kvm_err("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",
 					__func__, opc, vcpu, read_c0_entryhi());
 				kvm_mips_dump_host_tlbs();
+				kvm_mips_dump_guest_tlbs(vcpu);
 				local_irq_restore(flags);
 				return KVM_INVALID_INST;
 			}