From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org
Subject: [PATCH 1/8] KVM: Allow kvm_load_guest_fpu() even when !vcpu->fpu_active
Date: Thu, 21 Jan 2010 15:31:45 +0200 [thread overview]
Message-ID: <1264080712-3981-2-git-send-email-avi@redhat.com> (raw)
In-Reply-To: <1264080712-3981-1-git-send-email-avi@redhat.com>
This allows accessing the guest fpu from the instruction emulator, as well as
being symmetric with kvm_put_guest_fpu().
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/kvm/x86.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 47c6e23..e3145d5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4251,7 +4251,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
preempt_disable();
kvm_x86_ops->prepare_guest_switch(vcpu);
- kvm_load_guest_fpu(vcpu);
+ if (vcpu->fpu_active)
+ kvm_load_guest_fpu(vcpu);
local_irq_disable();
@@ -5297,7 +5298,7 @@ EXPORT_SYMBOL_GPL(fx_init);
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
{
- if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
+ if (vcpu->guest_fpu_loaded)
return;
vcpu->guest_fpu_loaded = 1;
--
1.6.5.3
next prev parent reply other threads:[~2010-01-21 13:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-21 13:31 [PATCH 0/8] cr0/cr4/efer/fpu miscellaneous bits Avi Kivity
2010-01-21 13:31 ` Avi Kivity [this message]
2010-01-21 13:31 ` [PATCH 2/8] KVM: Drop kvm_{load,put}_guest_fpu() exports Avi Kivity
2010-01-21 13:31 ` [PATCH 3/8] KVM: Activate fpu on clts Avi Kivity
2010-01-23 18:56 ` Marcelo Tosatti
2010-01-24 7:20 ` Avi Kivity
2010-02-02 8:16 ` Paolo Bonzini
2010-02-03 10:23 ` Gleb Natapov
2010-02-04 13:05 ` Avi Kivity
2010-02-04 13:11 ` Gleb Natapov
2010-02-04 17:56 ` Avi Kivity
2010-02-07 12:25 ` Avi Kivity
2010-01-21 13:31 ` [PATCH 4/8] KVM: Add a helper for checking if the guest is in protected mode Avi Kivity
2010-01-21 13:31 ` [PATCH 5/8] KVM: Move cr0/cr4/efer related helpers to x86.h Avi Kivity
2010-01-21 13:31 ` [PATCH 6/8] KVM: Rename vcpu->shadow_efer to efer Avi Kivity
2010-01-21 13:31 ` [PATCH 7/8] KVM: Optimize kvm_read_cr[04]_bits() Avi Kivity
2010-02-05 8:26 ` Jan Kiszka
2010-02-07 12:05 ` Avi Kivity
2010-02-07 12:33 ` Jan Kiszka
2010-02-07 12:37 ` Avi Kivity
2010-02-07 13:20 ` Jan Kiszka
2010-01-21 13:31 ` [PATCH 8/8] KVM: trace guest fpu loads and unloads Avi Kivity
2010-01-23 19:02 ` [PATCH 0/8] cr0/cr4/efer/fpu miscellaneous bits Marcelo Tosatti
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