Commit 91242fd1 authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by Paul Mackerras
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KVM: PPC: Add MMIO emulation for stdx (store doubleword indexed) 



This adds missing stdx emulation for emulated MMIO accesses by KVM
guests.  This allows the Mellanox mlx5_core driver from recent kernels
to work when MMIO emulation is enforced by userspace.

Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent 6f63e81b

arch/powerpc/include/asm/ppc-opcode.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -94,6 +94,7 @@ 
#define OP_31_XOP_TRAP_64   68

#define OP_31_XOP_TRAP_64   68

#define OP_31_XOP_DCBF      86

#define OP_31_XOP_DCBF      86

#define OP_31_XOP_LBZX      87

#define OP_31_XOP_LBZX      87

#define OP_31_XOP_STDX      149

#define OP_31_XOP_STWX      151

#define OP_31_XOP_STWX      151

#define OP_31_XOP_STBX      215

#define OP_31_XOP_STBX      215

#define OP_31_XOP_LBZUX     119

#define OP_31_XOP_LBZUX     119

arch/powerpc/kvm/emulate_loadstore.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -119,6 +119,12 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) 
			kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);

			kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);

			break;

			break;





		case OP_31_XOP_STDX:

			emulated = kvmppc_handle_store(run, vcpu,

						       kvmppc_get_gpr(vcpu, rs),

							8, 1);

			break;



		case OP_31_XOP_STWX:

		case OP_31_XOP_STWX:

			emulated = kvmppc_handle_store(run, vcpu,

			emulated = kvmppc_handle_store(run, vcpu,

						       kvmppc_get_gpr(vcpu, rs),

						       kvmppc_get_gpr(vcpu, rs),

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