From: Alexey Kardashevskiy <a...@ozlabs.ru>
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: Alexey Kardashevskiy <a...@ozlabs.ru>
Signed-off-by: Paul Mackerras <pau...@ozlabs.org>
---
arch/powerpc/include/asm/ppc-opcode.h | 1 +
arch/powerpc/kvm/emulate_loadstore.c | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/arch/powerpc/include/asm/ppc-opcode.h
b/arch/powerpc/include/asm/ppc-opcode.h
index 1e37c3c..94e7df2 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -94,6 +94,7 @@
#define OP_31_XOP_TRAP_64 68
#define OP_31_XOP_DCBF 86
#define OP_31_XOP_LBZX 87
+#define OP_31_XOP_STDX 149
#define OP_31_XOP_STWX 151
#define OP_31_XOP_STBX 215
#define OP_31_XOP_LBZUX 119
diff --git a/arch/powerpc/kvm/emulate_loadstore.c
b/arch/powerpc/kvm/emulate_loadstore.c
index 9cda1b9..a0f27a3 100644
--- a/arch/powerpc/kvm/emulate_loadstore.c
+++ b/arch/powerpc/kvm/emulate_loadstore.c
@@ -119,6 +119,12 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
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:
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
--
2.7.4
