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Commit d3286144 authored by Alexander Graf's avatar Alexander Graf
Browse files

KVM: PPC: Emulate dcbf 



Guests can trigger MMIO exits using dcbf. Since we don't emulate cache
incoherent MMIO, just do nothing and move on.

Reported-by: default avatarBen Collins <ben.c@servergy.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
Tested-by: default avatarBen Collins <ben.c@servergy.com>
CC: stable@vger.kernel.org
parent dfdebc24

arch/powerpc/kvm/emulate.c

+2 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#define OP_31_XOP_TRAP      4

#define OP_31_XOP_LWZX      23

#define OP_31_XOP_TRAP_64   68

#define OP_31_XOP_DCBF      86

#define OP_31_XOP_LBZX      87

#define OP_31_XOP_STWX      151

#define OP_31_XOP_STBX      215
@@ -374,6 +375,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) 
			emulated = kvmppc_emulate_mtspr(vcpu, sprn, rs);

			break;



		case OP_31_XOP_DCBF:

		case OP_31_XOP_DCBI:

			/* Do nothing. The guest is performing dcbi because

			 * hardware DMA is not snooped by the dcache, but