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Re: [PATCH v1 02/19] xen/xsm: wrap around xsm_sysctl with CONFIG_SYSCTL
- To: Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 13 Mar 2025 13:05:49 +0100
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- Cc: ray.huang@xxxxxxx, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 13 Mar 2025 12:05:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.03.2025 12:43, Alejandro Vallejo wrote:
> On Wed Mar 12, 2025 at 4:06 AM GMT, Penny Zheng wrote:
>> --- a/xen/include/xsm/dummy.h
>> +++ b/xen/include/xsm/dummy.h
>> @@ -180,11 +180,18 @@ static XSM_INLINE int cf_check xsm_domctl(
>> }
>> }
>>
>> +#ifdef CONFIG_SYSCTL
>> static XSM_INLINE int cf_check xsm_sysctl(XSM_DEFAULT_ARG int cmd)
>> {
>> XSM_ASSERT_ACTION(XSM_PRIV);
>> return xsm_default_action(action, current->domain, NULL);
>> }
>> +#else
>> +static XSM_INLINE int cf_check xsm_sysctl(XSM_DEFAULT_ARG int cmd)
>> +{
>> + return -EOPNOTSUPP;
>> +}
>> +#endif
>
> Doesn't this need to be -ENOSYS instead?
There shouldn't be any ENOSYS outside of the top-level hypercall handlers.
Granted we have many violations thereof, some of them not very reasonable
to fix (for guests looking for the specific but wrong error code).
Jan
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