booke.c (e3c55d406bd8df1a878546002c93db90c42be10c) booke.c (de79f7b9f6f92ec1bd6f61fa1f20de60728a5b5e)
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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651
652 return r;
653}
654
655int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
656{
657 int ret, s;
658#ifdef CONFIG_PPC_FPU
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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651
652 return r;
653}
654
655int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
656{
657 int ret, s;
658#ifdef CONFIG_PPC_FPU
659 unsigned int fpscr;
659 struct thread_fp_state fp;
660 int fpexc_mode;
660 int fpexc_mode;
661 u64 fpr[32];
662#endif
663
664 if (!vcpu->arch.sane) {
665 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
666 return -EINVAL;
667 }
668
669 local_irq_disable();
670 s = kvmppc_prepare_to_enter(vcpu);
671 if (s <= 0) {
672 local_irq_enable();
673 ret = s;
674 goto out;
675 }
676
677#ifdef CONFIG_PPC_FPU
678 /* Save userspace FPU state in stack */
679 enable_kernel_fp();
661#endif
662
663 if (!vcpu->arch.sane) {
664 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
665 return -EINVAL;
666 }
667
668 local_irq_disable();
669 s = kvmppc_prepare_to_enter(vcpu);
670 if (s <= 0) {
671 local_irq_enable();
672 ret = s;
673 goto out;
674 }
675
676#ifdef CONFIG_PPC_FPU
677 /* Save userspace FPU state in stack */
678 enable_kernel_fp();
680 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
681 fpscr = current->thread.fpscr.val;
679 fp = current->thread.fp_state;
682 fpexc_mode = current->thread.fpexc_mode;
683
684 /* Restore guest FPU state to thread */
680 fpexc_mode = current->thread.fpexc_mode;
681
682 /* Restore guest FPU state to thread */
685 memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
686 current->thread.fpscr.val = vcpu->arch.fpscr;
683 memcpy(current->thread.fp_state.fpr, vcpu->arch.fpr,
684 sizeof(vcpu->arch.fpr));
685 current->thread.fp_state.fpscr = vcpu->arch.fpscr;
687
688 /*
689 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
690 * as always using the FPU. Kernel usage of FP (via
691 * enable_kernel_fp()) in this thread must not occur while
692 * vcpu->fpu_active is set.
693 */
694 vcpu->fpu_active = 1;

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704 We also get here with interrupts enabled. */
705
706#ifdef CONFIG_PPC_FPU
707 kvmppc_save_guest_fp(vcpu);
708
709 vcpu->fpu_active = 0;
710
711 /* Save guest FPU state from thread */
686
687 /*
688 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
689 * as always using the FPU. Kernel usage of FP (via
690 * enable_kernel_fp()) in this thread must not occur while
691 * vcpu->fpu_active is set.
692 */
693 vcpu->fpu_active = 1;

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703 We also get here with interrupts enabled. */
704
705#ifdef CONFIG_PPC_FPU
706 kvmppc_save_guest_fp(vcpu);
707
708 vcpu->fpu_active = 0;
709
710 /* Save guest FPU state from thread */
712 memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
713 vcpu->arch.fpscr = current->thread.fpscr.val;
711 memcpy(vcpu->arch.fpr, current->thread.fp_state.fpr,
712 sizeof(vcpu->arch.fpr));
713 vcpu->arch.fpscr = current->thread.fp_state.fpscr;
714
715 /* Restore userspace FPU state from stack */
714
715 /* Restore userspace FPU state from stack */
716 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
717 current->thread.fpscr.val = fpscr;
716 current->thread.fp_state = fp;
718 current->thread.fpexc_mode = fpexc_mode;
719#endif
720
721out:
722 vcpu->mode = OUTSIDE_GUEST_MODE;
723 return ret;
724}
725

--- 1018 unchanged lines hidden --- 		717 current->thread.fpexc_mode = fpexc_mode;
718#endif
719
720out:
721 vcpu->mode = OUTSIDE_GUEST_MODE;
722 return ret;
723}
724

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