From: Paul Mackerras <paulus@ozlabs.org>
To: kvm@vger.kernel.org, linuxppc-dev@ozlabs.org, kvm-ppc@vger.kernel.org
Subject: [PATCH 3/5] KVM: PPC: Add MMIO emulation for stdx (store doubleword indexed)
Date: Thu, 23 Mar 2017 15:26:01 +1100 [thread overview]
Message-ID: <1490243163-19566-4-git-send-email-paulus@ozlabs.org> (raw)
In-Reply-To: <1490243163-19566-1-git-send-email-paulus@ozlabs.org>
From: Alexey Kardashevskiy <aik@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 <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@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
next prev parent reply other threads:[~2017-03-23 4:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-23 4:25 [PATCH 0/5] KVM: PPC: Improve MMIO emulation Paul Mackerras
2017-03-23 4:25 ` [PATCH 1/5] KVM: PPC: Provide functions for queueing up FP/VEC/VSX unavailable interrupts Paul Mackerras
2017-03-23 4:26 ` [PATCH 2/5] KVM: PPC: Book3S: Add MMIO emulation for FP and VSX instructions Paul Mackerras
2017-03-24 11:27 ` kbuild test robot
2017-03-23 4:26 ` Paul Mackerras [this message]
2017-03-23 4:26 ` [PATCH 4/5] KVM: PPC: Emulation for more integer loads and stores Paul Mackerras
2017-03-23 4:26 ` [PATCH 5/5] KVM: PPC: Add MMIO emulation for remaining floating-point instructions Paul Mackerras
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