Commit 2e6baa46 authored by Simon Guo's avatar Simon Guo Committed by Paul Mackerras

KVM: PPC: Add giveup_ext() hook to PPC KVM ops

Currently HV will save math regs(FP/VEC/VSX) when trap into host. But
PR KVM will only save math regs when qemu task switch out of CPU, or
when returning from qemu code.

To emulate FP/VEC/VSX mmio load, PR KVM need to make sure that math
regs were flushed firstly and then be able to update saved VCPU
FPR/VEC/VSX area reasonably.

This patch adds giveup_ext() field to KVM ops. Only PR KVM has non-NULL
giveup_ext() ops. kvmppc_complete_mmio_load() can invoke that hook
(when not NULL) to flush math regs accordingly, before updating saved
register vals.

Math regs flush is also necessary for STORE, which will be covered
in later patch within this patch series.
Signed-off-by: default avatarSimon Guo <wei.guo.simon@gmail.com>
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parent 70923603
...@@ -324,6 +324,7 @@ struct kvmppc_ops { ...@@ -324,6 +324,7 @@ struct kvmppc_ops {
int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info); int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
int (*set_smt_mode)(struct kvm *kvm, unsigned long mode, int (*set_smt_mode)(struct kvm *kvm, unsigned long mode,
unsigned long flags); unsigned long flags);
void (*giveup_ext)(struct kvm_vcpu *vcpu, ulong msr);
}; };
extern struct kvmppc_ops *kvmppc_hv_ops; extern struct kvmppc_ops *kvmppc_hv_ops;
......
...@@ -1789,6 +1789,7 @@ static struct kvmppc_ops kvm_ops_pr = { ...@@ -1789,6 +1789,7 @@ static struct kvmppc_ops kvm_ops_pr = {
#ifdef CONFIG_PPC_BOOK3S_64 #ifdef CONFIG_PPC_BOOK3S_64
.hcall_implemented = kvmppc_hcall_impl_pr, .hcall_implemented = kvmppc_hcall_impl_pr,
#endif #endif
.giveup_ext = kvmppc_giveup_ext,
}; };
......
...@@ -1061,6 +1061,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, ...@@ -1061,6 +1061,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
break; break;
case KVM_MMIO_REG_FPR: case KVM_MMIO_REG_FPR:
if (vcpu->kvm->arch.kvm_ops->giveup_ext)
vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
break; break;
#ifdef CONFIG_PPC_BOOK3S #ifdef CONFIG_PPC_BOOK3S
...@@ -1074,6 +1077,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, ...@@ -1074,6 +1077,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
#endif #endif
#ifdef CONFIG_VSX #ifdef CONFIG_VSX
case KVM_MMIO_REG_VSX: case KVM_MMIO_REG_VSX:
if (vcpu->kvm->arch.kvm_ops->giveup_ext)
vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD) if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
kvmppc_set_vsr_dword(vcpu, gpr); kvmppc_set_vsr_dword(vcpu, gpr);
else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD) else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
...@@ -1088,6 +1094,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, ...@@ -1088,6 +1094,9 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
#endif #endif
#ifdef CONFIG_ALTIVEC #ifdef CONFIG_ALTIVEC
case KVM_MMIO_REG_VMX: case KVM_MMIO_REG_VMX:
if (vcpu->kvm->arch.kvm_ops->giveup_ext)
vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
kvmppc_set_vmx_dword(vcpu, gpr); kvmppc_set_vmx_dword(vcpu, gpr);
break; break;
#endif #endif
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment