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Re: [Xen-devel] [PATCH v3 3/7] x86: make PV hypercall entry points work with !CONFIG_PV
- To: Wei Liu <wei.liu2@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 5 Nov 2018 15:49:40 +0000
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>
- Delivery-date: Mon, 05 Nov 2018 15:49:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 05/11/18 15:48, Wei Liu wrote:
> On Mon, Nov 05, 2018 at 08:04:37AM -0700, Jan Beulich wrote:
>>>>> On 02.11.18 at 16:55, <wei.liu2@xxxxxxxxxx> wrote:
>>> --- a/xen/arch/x86/x86_64/traps.c
>>> +++ b/xen/arch/x86/x86_64/traps.c
>>> @@ -298,8 +298,21 @@ static unsigned int write_stub_trampoline(
>>> }
>>>
>>> DEFINE_PER_CPU(struct stubs, stubs);
>>> +
>>> +#ifdef CONFIG_PV
>>> void lstar_enter(void);
>>> void cstar_enter(void);
>>> +#else
>>> +static inline void lstar_enter(void)
>>> +{
>>> + panic("%s called", __func__);
>>> +}
>>> +
>>> +static inline void cstar_enter(void)
>>> +{
>>> + panic("%s called", __func__);
>>> +}
>>> +#endif /* CONFIG_PV */
>> Do we really need two separate stubs (and two separate string literals)
>> here?
> I think it is clearer if we have two distinct messages. But I'm not too
> fussed either way really. If you feel strongly about this, I'm happy to
> change it to only one function.
This is the correct way to do it. __func__ will already be in the
string table, and the format string (being identical) will be merged.
~Andrew
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