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KVM: PPC: Add MMIO emulation for remaining floating-point instructions 

For completeness, this adds emulation of the lfiwax and lfiwzx
instructions.  With this, all floating-point load and store instructions
as of Power ISA V2.07 are emulated.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Paul Mackerras 2017-03-23 11:55:16 +11:00
parent ceba57df43
commit 9b5ab00513
2 changed files with 16 additions and 0 deletions
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2
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -122,6 +122,8 @@
#define OP_31_XOP_STFDX 727
#define OP_31_XOP_STFDUX 759
#define OP_31_XOP_LHBRX 790
#define OP_31_XOP_LFIWAX 855
#define OP_31_XOP_LFIWZX 887
#define OP_31_XOP_STHBRX 918
#define OP_31_XOP_STFIWX 983

14
arch/powerpc/kvm/emulate_loadstore.c
View File

@ -270,6 +270,20 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_31_XOP_LFIWAX:
if (kvmppc_check_fp_disabled(vcpu))
return EMULATE_DONE;
emulated = kvmppc_handle_loads(run, vcpu,
KVM_MMIO_REG_FPR|rt, 4, 1);
break;
case OP_31_XOP_LFIWZX:
if (kvmppc_check_fp_disabled(vcpu))
return EMULATE_DONE;
emulated = kvmppc_handle_load(run, vcpu,
KVM_MMIO_REG_FPR|rt, 4, 1);
break;
case OP_31_XOP_STFSX:
if (kvmppc_check_fp_disabled(vcpu))
return EMULATE_DONE;