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4cf74c9c83
Use the lockless GVA helpers to implement the reading of guest instructions for emulation. This will allow it to handle asynchronous TLB flushes when they are implemented. This is a little more complicated than the other two cases (get_inst() and dynamic translation) due to the need to emulate the appropriate guest TLB exception when the address isn't present or isn't valid in the guest TLB. Since there are several protected cache ops that may need to be performed safely, this is abstracted by kvm_mips_guest_cache_op() which is passed a protected cache op function pointer and takes care of the lockless operation and fault handling / retry if the op should fail, taking advantage of the new errors which the protected cache ops can now return. This allows the existing advance fault handling which relied on host TLB lookups to be removed, along with the now unused kvm_mips_host_tlb_lookup(), 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: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org |
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