Re: [Xen-devel] [PATCH v2 15/23] vixen: pass through version hypercalls to parent Xen

[Anthony Liguori <anthony@xxxxxxxxxxxxx>]

On Sun, Jan 7, 2018 at 4:27 PM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> On Sun, Jan 07, 2018 at 12:28:31PM -0800, Anthony Liguori wrote:
>> From: Anthony Liguori <aliguori@xxxxxxxxxx>
>>
>> This is necessary to trigger event channel upcalls but it is also
>> useful to passthrough the full version information such that the
>> guest believes it is running on the parent Xen.
>>
>> Signed-off-by: Matt Wilson <msw@xxxxxxxxxx>
>> Signed-off-by: Anthony Liguori <aliguori@xxxxxxxxxx>
>> ---
>> v1 -> v2
>>  - don't pass through version by default
>>  - introduce vixen_ptver parameter to enable version passthrough.
>> ---
>>  xen/arch/x86/guest/vixen.c        |  7 +++
>>  xen/common/kernel.c               | 89 
>> +++++++++++++++++++++++++++++++++------
>>  xen/include/asm-arm/guest/vixen.h |  5 +++
>>  xen/include/asm-x86/guest/vixen.h |  2 +
>>  4 files changed, 91 insertions(+), 12 deletions(-)
>>
>> diff --git a/xen/arch/x86/guest/vixen.c b/xen/arch/x86/guest/vixen.c
>> index a1614e0..7c886a2 100644
>> --- a/xen/arch/x86/guest/vixen.c
>> +++ b/xen/arch/x86/guest/vixen.c
>> @@ -31,8 +31,10 @@ static int in_vixen;
>>  static int vixen_domid = 1;
>>  static uint32_t vixen_reserved_mem_pgstart = 0xfeff0000;
>>  static shared_info_t *global_si;
>> +static bool vixen_ptver;
>>
>>  integer_param("vixen_domid", vixen_domid);
>> +boolean_param("vixen_ptver", vixen_ptver);
>
> Would it make sense to have a custom parameter function that would
> be called 'vixen' and have all of those in it?

Can you give an example?  I'm not sure what you mean.

Regards,

Anthony Liguori


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