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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: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Alexey Kardashevskiy 2017-03-17 19:31:38 +11:00 committed by Paul Mackerras
parent 6f63e81bda
commit 91242fd1a3
2 changed files with 7 additions and 0 deletions
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1
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -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

6
arch/powerpc/kvm/emulate_loadstore.c
View File

@ -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),