diff options
| author | James Hogan <james.hogan@imgtec.com> | 2016-07-04 21:35:13 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-05 17:09:17 +0300 |
| commit | 5cc4aafced42d7ece3d20650bf6ca2a165e6fca3 (patch) | |
| tree | 7ab1bb01e023111e7629da7367214de58727fdfe /arch | |
| parent | 2e0badfaac234ef3ed6b5397ff208d218cd450fb (diff) | |
| download | linux-5cc4aafced42d7ece3d20650bf6ca2a165e6fca3.tar.xz | |
MIPS: KVM: Recognise r6 CACHE encoding
Recognise the new MIPSr6 CACHE instruction encoding rather than the
pre-r6 one when an r6 kernel is being built. A SPECIAL3 opcode is used
and the immediate field is reduced to 9 bits wide since MIPSr6.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kvm/dyntrans.c | 5 | ||||
| -rw-r--r-- | arch/mips/kvm/emulate.c | 21 |
2 files changed, 24 insertions, 2 deletions
diff --git a/arch/mips/kvm/dyntrans.c b/arch/mips/kvm/dyntrans.c index 8a1833b9eb38..91ebd2b6034f 100644 --- a/arch/mips/kvm/dyntrans.c +++ b/arch/mips/kvm/dyntrans.c @@ -72,7 +72,10 @@ int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc, synci_inst.i_format.opcode = bcond_op; synci_inst.i_format.rs = inst.i_format.rs; synci_inst.i_format.rt = synci_op; - synci_inst.i_format.simmediate = inst.i_format.simmediate; + if (cpu_has_mips_r6) + synci_inst.i_format.simmediate = inst.spec3_format.simmediate; + else + synci_inst.i_format.simmediate = inst.i_format.simmediate; return kvm_mips_trans_replace(vcpu, opc, synci_inst); } diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c index f0fa9e956056..62e6a7b313ae 100644 --- a/arch/mips/kvm/emulate.c +++ b/arch/mips/kvm/emulate.c @@ -1601,7 +1601,10 @@ enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst, base = inst.i_format.rs; op_inst = inst.i_format.rt; - offset = inst.i_format.simmediate; + if (cpu_has_mips_r6) + offset = inst.spec3_format.simmediate; + else + offset = inst.i_format.simmediate; cache = op_inst & CacheOp_Cache; op = op_inst & CacheOp_Op; @@ -1764,11 +1767,27 @@ enum emulation_result kvm_mips_emulate_inst(u32 cause, u32 *opc, er = kvm_mips_emulate_load(inst, cause, run, vcpu); break; +#ifndef CONFIG_CPU_MIPSR6 case cache_op: ++vcpu->stat.cache_exits; trace_kvm_exit(vcpu, KVM_TRACE_EXIT_CACHE); er = kvm_mips_emulate_cache(inst, opc, cause, run, vcpu); break; +#else + case spec3_op: + switch (inst.spec3_format.func) { + case cache6_op: + ++vcpu->stat.cache_exits; + trace_kvm_exit(vcpu, KVM_TRACE_EXIT_CACHE); + er = kvm_mips_emulate_cache(inst, opc, cause, run, + vcpu); + break; + default: + goto unknown; + }; + break; +unknown: +#endif default: kvm_err("Instruction emulation not supported (%p/%#x)\n", opc, |