diff options
| author | Avi Kivity <avi@redhat.com> | 2011-04-20 14:32:49 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-22 14:39:14 +0200 |
| commit | 2d04a05bd7e93c13f13a82ac40de4065a99d069b (patch) | |
| tree | 6fc122171050ca4b0a6aca5ab5aeb8d94add0108 /arch/x86/kvm | |
| parent | KVM: x86 emulator: Replace calls to is_pae() and is_paging with ->get_cr() (diff) | |
| download | linux-2d04a05bd7e93c13f13a82ac40de4065a99d069b.tar.xz linux-2d04a05bd7e93c13f13a82ac40de4065a99d069b.zip | |
KVM: x86 emulator: emulate CLTS internally
Avoid using ctxt->vcpu; we can do everything with ->get_cr() and ->set_cr().
A side effect is that we no longer activate the fpu on emulated CLTS; but that
should be very rare.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 12 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 7 |
2 files changed, 11 insertions, 8 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 6a5125328669..2b903a326096 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2579,6 +2579,16 @@ static int em_invlpg(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int em_clts(struct x86_emulate_ctxt *ctxt) +{ + ulong cr0; + + cr0 = ctxt->ops->get_cr(ctxt, 0); + cr0 &= ~X86_CR0_TS; + ctxt->ops->set_cr(ctxt, 0, cr0); + return X86EMUL_CONTINUE; +} + static bool valid_cr(int nr) { switch (nr) { @@ -4079,7 +4089,7 @@ twobyte_insn: rc = emulate_syscall(ctxt, ops); break; case 0x06: - emulate_clts(ctxt->vcpu); + rc = em_clts(ctxt); break; case 0x09: /* wbinvd */ kvm_emulate_wbinvd(ctxt->vcpu); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 7cd3a3b491de..a9e83862feb8 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4153,13 +4153,6 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); -int emulate_clts(struct kvm_vcpu *vcpu) -{ - kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); - kvm_x86_ops->fpu_activate(vcpu); - return X86EMUL_CONTINUE; -} - int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) { return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |