Re: [PATCH kernel] KVM: PPC: Book3S HV: Make unique debugfs nodename

Alexey Kardashevskiy [off-list ref] writes:

On 07/07/2021 14:13, Alexey Kardashevskiy wrote:

alternatively move this debugfs stuff under the platform-independent
directory, how about that?

That's a good idea. I only now realized we have two separate directories
for the same guest:

$ ls /sys/kernel/debug/kvm/ | grep $pid
19062-11
vm19062               

Looks like we would have to implement kvm_arch_create_vcpu_debugfs for
the vcpu information and add a similar hook for the vm.

quoted

---
  arch/powerpc/kvm/book3s_hv.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 1d1fcc290fca..0223ddc0eed0 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c

@@ -5227,7 +5227,7 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm)
  	/*
  	 * Create a debugfs directory for the VM
  	 */
-	snprintf(buf, sizeof(buf), "vm%d", current->pid);
+	snprintf(buf, sizeof(buf), "vm%d-lp%ld", current->pid, lpid);
  	kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir);
  	kvmppc_mmu_debugfs_init(kvm);
  	if (radix_enabled())