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| author | Avi Kivity <avi@redhat.com> | 2011-03-28 16:53:59 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-11 07:56:58 -0400 |
| commit | 5037f6f324cdcc6c9071dc774aba992f96c7e5ff (patch) | |
| tree | 600ae6a745b1952e2de36d8a7a14034438190041 /arch/x86/kvm/x86.c | |
| parent | 1d6b114f20d06ac0749686e4d7b7c7913d9116db (diff) | |
| download | linux-3.10-5037f6f324cdcc6c9071dc774aba992f96c7e5ff.tar.gz linux-3.10-5037f6f324cdcc6c9071dc774aba992f96c7e5ff.tar.bz2 linux-3.10-5037f6f324cdcc6c9071dc774aba992f96c7e5ff.zip | |
KVM: x86 emulator: define callbacks for using the guest fpu within the emulator
Needed for emulating fpu instructions.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 11d692c7018..5af66515337 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4281,6 +4281,22 @@ static void emulator_set_segment_selector(u16 sel, int seg, kvm_set_segment(vcpu, &kvm_seg, seg); } +static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) +{ + preempt_disable(); + kvm_load_guest_fpu(ctxt->vcpu); + /* + * CR0.TS may reference the host fpu state, not the guest fpu state, + * so it may be clear at this point. + */ + clts(); +} + +static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) +{ + preempt_enable(); +} + static struct x86_emulate_ops emulate_ops = { .read_std = kvm_read_guest_virt_system, .write_std = kvm_write_guest_virt_system, @@ -4304,6 +4320,8 @@ static struct x86_emulate_ops emulate_ops = { .set_dr = emulator_set_dr, .set_msr = kvm_set_msr, .get_msr = kvm_get_msr, + .get_fpu = emulator_get_fpu, + .put_fpu = emulator_put_fpu, }; static void cache_all_regs(struct kvm_vcpu *vcpu) |