diff options
| author | Avi Kivity <avi@redhat.com> | 2011-04-20 12:32:49 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-22 12:39:14 (GMT) |
| commit | 2d04a05bd7e93c13f13a82ac40de4065a99d069b (patch) | |
| tree | 6fc122171050ca4b0a6aca5ab5aeb8d94add0108 | |
| parent | fd72c4192220d0086fb24356ac6ff9c3b1e067d9 (diff) | |
| download | linux-2d04a05bd7e93c13f13a82ac40de4065a99d069b.tar.xz | |
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>
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/emulate.c | 12 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 7 |
3 files changed, 11 insertions, 9 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a8616ca..9c3567e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -691,7 +691,6 @@ int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); int kvm_emulate_halt(struct kvm_vcpu *vcpu); int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); -int emulate_clts(struct kvm_vcpu *vcpu); int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 6a51253..2b903a3 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 7cd3a3b..a9e8386 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); |