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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2016-08-09 19:13:00 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2016-08-12 12:01:26 +0200 |
| commit | 023e9fddc3616b005c3753fc1bb6526388cd7a30 (patch) | |
| tree | 443aa4c9d82f97022982ba97f8da12f0cbfcae0a | |
| parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) | |
| download | linux-stable-023e9fddc3616b005c3753fc1bb6526388cd7a30.tar.gz linux-stable-023e9fddc3616b005c3753fc1bb6526388cd7a30.tar.bz2 linux-stable-023e9fddc3616b005c3753fc1bb6526388cd7a30.zip | |
KVM: PPC: Move xics_debugfs_init out of create
As we are about to hold the kvm->lock during the create operation on KVM
devices, we should move the call to xics_debugfs_init into its own
function, since holding a mutex over extended amounts of time might not
be a good idea.
Introduce an init operation on the kvm_device_ops struct which cannot
fail and call this, if configured, after the device has been created.
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
| -rw-r--r-- | arch/powerpc/kvm/book3s_xics.c | 10 | ||||
| -rw-r--r-- | include/linux/kvm_host.h | 6 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 3 |
3 files changed, 17 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_xics.c b/arch/powerpc/kvm/book3s_xics.c index a75ba38a2d81..f2def8e45fef 100644 --- a/arch/powerpc/kvm/book3s_xics.c +++ b/arch/powerpc/kvm/book3s_xics.c @@ -1341,8 +1341,6 @@ static int kvmppc_xics_create(struct kvm_device *dev, u32 type) return ret; } - xics_debugfs_init(xics); - #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE if (cpu_has_feature(CPU_FTR_ARCH_206)) { /* Enable real mode support */ @@ -1354,9 +1352,17 @@ static int kvmppc_xics_create(struct kvm_device *dev, u32 type) return 0; } +static void kvmppc_xics_init(struct kvm_device *dev) +{ + struct kvmppc_xics *xics = (struct kvmppc_xics *)dev->private; + + xics_debugfs_init(xics); +} + struct kvm_device_ops kvm_xics_ops = { .name = "kvm-xics", .create = kvmppc_xics_create, + .init = kvmppc_xics_init, .destroy = kvmppc_xics_free, .set_attr = xics_set_attr, .get_attr = xics_get_attr, diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 01e908ac4a39..d3c9b82812c3 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1116,6 +1116,12 @@ struct kvm_device_ops { int (*create)(struct kvm_device *dev, u32 type); /* + * init is called after create if create is successful and is called + * outside of holding kvm->lock. + */ + void (*init)(struct kvm_device *dev); + + /* * Destroy is responsible for freeing dev. * * Destroy may be called before or after destructors are called diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index cc081ccfcaa3..ae642452e91a 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2838,6 +2838,9 @@ static int kvm_ioctl_create_device(struct kvm *kvm, return ret; } + if (ops->init) + ops->init(dev); + ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC); if (ret < 0) { ops->destroy(dev); |