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KVM: TDX: Use guard() to acquire kvm->lock in tdx_vm_ioctl()

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Use guard() in tdx_vm_ioctl() to tidy up the code a small amount, but more
importantly to minimize the diff of a future change, which will use
guard-like semantics to acquire and release multiple locks.

No functional change intended.

Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Yan Zhao <yan.y.zhao@intel.com>
Tested-by: Yan Zhao <yan.y.zhao@intel.com>
Tested-by: Kai Huang <kai.huang@intel.com>
Link: https://patch.msgid.link/20251030200951.3402865-25-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2025-10-30 13:09:47 -07:00
parent 94428e3ba3
commit 0b76e827b2
1 changed files with 3 additions and 6 deletions
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9
arch/x86/kvm/vmx/tdx.c
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@@ -2816,7 +2816,7 @@ int tdx_vm_ioctl(struct kvm *kvm, void __user *argp)
if (r)
return r;
mutex_lock(&kvm->lock);
guard(mutex)(&kvm->lock);
switch (tdx_cmd.id) {
case KVM_TDX_CAPABILITIES:
@@ -2829,15 +2829,12 @@ int tdx_vm_ioctl(struct kvm *kvm, void __user *argp)
r = tdx_td_finalize(kvm, &tdx_cmd);
break;
default:
r = -EINVAL;
goto out;
return -EINVAL;
}
if (copy_to_user(argp, &tdx_cmd, sizeof(struct kvm_tdx_cmd)))
r = -EFAULT;
return -EFAULT;
out:
mutex_unlock(&kvm->lock);
return r;
}