From: Paul Mackerras <paulus@ozlabs.org>
To: kvm@vger.kernel.org, linuxppc-dev@ozlabs.org, kvm-ppc@vger.kernel.org
Subject: [PATCH 5/5] KVM: PPC: Add MMIO emulation for remaining floating-point instructions
Date: Thu, 23 Mar 2017 15:26:03 +1100 [thread overview]
Message-ID: <1490243163-19566-6-git-send-email-paulus@ozlabs.org> (raw)
In-Reply-To: <1490243163-19566-1-git-send-email-paulus@ozlabs.org>
For completeness, this adds emulation of the lfiwax and lfiwzx
instructions. With this, all floating-point load and store instructions
as of Power ISA V2.07 are emulated.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
arch/powerpc/include/asm/ppc-opcode.h | 2 ++
arch/powerpc/kvm/emulate_loadstore.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 738bac1..73f06f4 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -122,6 +122,8 @@
#define OP_31_XOP_STFDX 727
#define OP_31_XOP_STFDUX 759
#define OP_31_XOP_LHBRX 790
+#define OP_31_XOP_LFIWAX 855
+#define OP_31_XOP_LFIWZX 887
#define OP_31_XOP_STHBRX 918
#define OP_31_XOP_STFIWX 983
diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c
index f10ba0c..af83353 100644
--- a/arch/powerpc/kvm/emulate_loadstore.c
+++ b/arch/powerpc/kvm/emulate_loadstore.c
@@ -270,6 +270,20 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
+ case OP_31_XOP_LFIWAX:
+ if (kvmppc_check_fp_disabled(vcpu))
+ return EMULATE_DONE;
+ emulated = kvmppc_handle_loads(run, vcpu,
+ KVM_MMIO_REG_FPR|rt, 4, 1);
+ break;
+
+ case OP_31_XOP_LFIWZX:
+ if (kvmppc_check_fp_disabled(vcpu))
+ return EMULATE_DONE;
+ emulated = kvmppc_handle_load(run, vcpu,
+ KVM_MMIO_REG_FPR|rt, 4, 1);
+ break;
+
case OP_31_XOP_STFSX:
if (kvmppc_check_fp_disabled(vcpu))
return EMULATE_DONE;
--
2.7.4
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 ` [PATCH 3/5] KVM: PPC: Add MMIO emulation for stdx (store doubleword indexed) Paul Mackerras
2017-03-23 4:26 ` [PATCH 4/5] KVM: PPC: Emulation for more integer loads and stores Paul Mackerras
2017-03-23 4:26 ` Paul Mackerras [this message]
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