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KVM: PPC: Add KVMPPC_VSX_COPY_WORD_LOAD_DUMP type support for mmio emulation

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Some VSX instructions like lxvwsx will splat word into VSR. This patch
adds a new VSX copy type KVMPPC_VSX_COPY_WORD_LOAD_DUMP to support this.

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Simon Guo 2018-05-21 13:24:20 +08:00 committed by Paul Mackerras
parent ec531d027a
commit 94dd7fa1c0
2 changed files with 24 additions and 0 deletions
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1
arch/powerpc/include/asm/kvm_host.h
View File

@ -453,6 +453,7 @@ struct mmio_hpte_cache {
#define KVMPPC_VSX_COPY_WORD 1
#define KVMPPC_VSX_COPY_DWORD 2
#define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP 3
#define KVMPPC_VSX_COPY_WORD_LOAD_DUMP 4
struct openpic;

23
arch/powerpc/kvm/powerpc.c
View File

@ -907,6 +907,26 @@ static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
}
}
static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
u32 gpr)
{
union kvmppc_one_reg val;
int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
val.vsx32val[0] = gpr;
val.vsx32val[1] = gpr;
val.vsx32val[2] = gpr;
val.vsx32val[3] = gpr;
VCPU_VSX_VR(vcpu, index) = val.vval;
} else {
val.vsx32val[0] = gpr;
val.vsx32val[1] = gpr;
VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
}
}
static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
u32 gpr32)
{
@ -1061,6 +1081,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
else if (vcpu->arch.mmio_vsx_copy_type ==
KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
kvmppc_set_vsr_dword_dump(vcpu, gpr);
else if (vcpu->arch.mmio_vsx_copy_type ==
KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
kvmppc_set_vsr_word_dump(vcpu, gpr);
break;
#endif
#ifdef CONFIG_ALTIVEC