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kvm: create per-vcpu dirs in debugfs

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This commit adds the ability for archs to export
per-vcpu information via a new per-vcpu dir in
the VM's debugfs directory.

If kvm_arch_has_vcpu_debugfs() returns true, then KVM
will create a vcpu dir for each vCPU in the VM's
debugfs directory. Then kvm_arch_create_vcpu_debugfs()
is responsible for populating each vcpu directory
with arch specific entries.

The per-vcpu path in debugfs will look like:

/sys/kernel/debug/kvm/29162-10/vcpu0
/sys/kernel/debug/kvm/29162-10/vcpu1

This is all arch specific for now because the only
user of this interface (x86) wants to export x86-specific
per-vcpu information to user-space.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Luiz Capitulino
2016-09-16 10:27:35 -04:00
committed by Paolo Bonzini
parent 235539b48a
commit 45b5939e50
2 changed files with 33 additions and 0 deletions
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include/linux/kvm_host.h
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@@ -265,6 +265,7 @@ struct kvm_vcpu {
#endif
bool preempted;
struct kvm_vcpu_arch arch;
struct dentry *debugfs_dentry;
};
static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)