| Message ID | 20171129164116.16167-3-christoffer.dall@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 29.11.2017 17:41, Christoffer Dall wrote: > In preparation for moving calls to vcpu_load() and vcpu_put() into the > architecture specific implementations of the KVM vcpu ioctls, move the > calls in the main kvm_vcpu_ioctl() dispatcher function to each case > of the ioctl select statement. This allows us to move the vcpu_load() > and vcpu_put() calls into architecture specific implementations of vcpu > ioctls, one by one. > > Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> > --- > virt/kvm/kvm_main.c | 26 ++++++++++++++++++++++++-- > 1 file changed, 24 insertions(+), 2 deletions(-) > > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 39961fb..480b16c 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -2525,13 +2525,13 @@ static long kvm_vcpu_ioctl(struct file *filp, > > if (mutex_lock_killable(&vcpu->mutex)) > return -EINTR; > - vcpu_load(vcpu); > switch (ioctl) { > case KVM_RUN: { > struct pid *oldpid; > r = -EINVAL; > if (arg) > goto out; > + vcpu_load(vcpu); > oldpid = rcu_access_pointer(vcpu->pid); > if (unlikely(oldpid != current->pids[PIDTYPE_PID].pid)) { > /* The thread running this VCPU changed. */ > @@ -2543,6 +2543,7 @@ static long kvm_vcpu_ioctl(struct file *filp, > put_pid(oldpid); > } > r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); > + vcpu_put(vcpu); > trace_kvm_userspace_exit(vcpu->run->exit_reason, r); > break; > } > @@ -2553,7 +2554,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); > if (!kvm_regs) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); > + vcpu_put(vcpu); > if (r) > goto out_free1; > r = -EFAULT; > @@ -2573,7 +2576,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = PTR_ERR(kvm_regs); > goto out; > } > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); > + vcpu_put(vcpu); > kfree(kvm_regs); > break; > } > @@ -2582,7 +2587,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = -ENOMEM; > if (!kvm_sregs) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); > + vcpu_put(vcpu); > if (r) > goto out; > r = -EFAULT; > @@ -2598,13 +2605,17 @@ static long kvm_vcpu_ioctl(struct file *filp, > kvm_sregs = NULL; > goto out; > } > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); > + vcpu_put(vcpu); > break; > } > case KVM_GET_MP_STATE: { > struct kvm_mp_state mp_state; > > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); > + vcpu_put(vcpu); > if (r) > goto out; > r = -EFAULT; > @@ -2619,7 +2630,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = -EFAULT; > if (copy_from_user(&mp_state, argp, sizeof(mp_state))) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); > + vcpu_put(vcpu); > break; > } > case KVM_TRANSLATE: { > @@ -2628,7 +2641,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = -EFAULT; > if (copy_from_user(&tr, argp, sizeof(tr))) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); > + vcpu_put(vcpu); > if (r) > goto out; > r = -EFAULT; > @@ -2643,7 +2658,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = -EFAULT; > if (copy_from_user(&dbg, argp, sizeof(dbg))) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); > + vcpu_put(vcpu); > break; > } > case KVM_SET_SIGNAL_MASK: { > @@ -2674,7 +2691,9 @@ static long kvm_vcpu_ioctl(struct file *filp, > r = -ENOMEM; > if (!fpu) > goto out; > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); > + vcpu_put(vcpu); > if (r) > goto out; > r = -EFAULT; > @@ -2690,14 +2709,17 @@ static long kvm_vcpu_ioctl(struct file *filp, > fpu = NULL; > goto out; > } > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); > + vcpu_put(vcpu); > break; > } > default: > + vcpu_load(vcpu); > r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); > + vcpu_put(vcpu); > } > out: > - vcpu_put(vcpu); > mutex_unlock(&vcpu->mutex); > kfree(fpu); > kfree(kvm_sregs); > Reviewed-by: David Hildenbrand <david@redhat.com>
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 39961fb..480b16c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2525,13 +2525,13 @@ static long kvm_vcpu_ioctl(struct file *filp, if (mutex_lock_killable(&vcpu->mutex)) return -EINTR; - vcpu_load(vcpu); switch (ioctl) { case KVM_RUN: { struct pid *oldpid; r = -EINVAL; if (arg) goto out; + vcpu_load(vcpu); oldpid = rcu_access_pointer(vcpu->pid); if (unlikely(oldpid != current->pids[PIDTYPE_PID].pid)) { /* The thread running this VCPU changed. */ @@ -2543,6 +2543,7 @@ static long kvm_vcpu_ioctl(struct file *filp, put_pid(oldpid); } r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); + vcpu_put(vcpu); trace_kvm_userspace_exit(vcpu->run->exit_reason, r); break; } @@ -2553,7 +2554,9 @@ static long kvm_vcpu_ioctl(struct file *filp, kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); if (!kvm_regs) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); + vcpu_put(vcpu); if (r) goto out_free1; r = -EFAULT; @@ -2573,7 +2576,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = PTR_ERR(kvm_regs); goto out; } + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); + vcpu_put(vcpu); kfree(kvm_regs); break; } @@ -2582,7 +2587,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = -ENOMEM; if (!kvm_sregs) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); + vcpu_put(vcpu); if (r) goto out; r = -EFAULT; @@ -2598,13 +2605,17 @@ static long kvm_vcpu_ioctl(struct file *filp, kvm_sregs = NULL; goto out; } + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); + vcpu_put(vcpu); break; } case KVM_GET_MP_STATE: { struct kvm_mp_state mp_state; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); + vcpu_put(vcpu); if (r) goto out; r = -EFAULT; @@ -2619,7 +2630,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = -EFAULT; if (copy_from_user(&mp_state, argp, sizeof(mp_state))) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); + vcpu_put(vcpu); break; } case KVM_TRANSLATE: { @@ -2628,7 +2641,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = -EFAULT; if (copy_from_user(&tr, argp, sizeof(tr))) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); + vcpu_put(vcpu); if (r) goto out; r = -EFAULT; @@ -2643,7 +2658,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = -EFAULT; if (copy_from_user(&dbg, argp, sizeof(dbg))) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); + vcpu_put(vcpu); break; } case KVM_SET_SIGNAL_MASK: { @@ -2674,7 +2691,9 @@ static long kvm_vcpu_ioctl(struct file *filp, r = -ENOMEM; if (!fpu) goto out; + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); + vcpu_put(vcpu); if (r) goto out; r = -EFAULT; @@ -2690,14 +2709,17 @@ static long kvm_vcpu_ioctl(struct file *filp, fpu = NULL; goto out; } + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); + vcpu_put(vcpu); break; } default: + vcpu_load(vcpu); r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); + vcpu_put(vcpu); } out: - vcpu_put(vcpu); mutex_unlock(&vcpu->mutex); kfree(fpu); kfree(kvm_sregs);
In preparation for moving calls to vcpu_load() and vcpu_put() into the architecture specific implementations of the KVM vcpu ioctls, move the calls in the main kvm_vcpu_ioctl() dispatcher function to each case of the ioctl select statement. This allows us to move the vcpu_load() and vcpu_put() calls into architecture specific implementations of vcpu ioctls, one by one. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> --- virt/kvm/kvm_main.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-)