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Re: [PATCH v2 1/4] xl: Add support for ignore_msrs option
- To: Julien Grall <julien@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Fri, 22 Jan 2021 13:28:38 -0500
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- Cc: iwj@xxxxxxxxxxxxxx, wl@xxxxxxx, anthony.perard@xxxxxxxxxx, jbeulich@xxxxxxxx, andrew.cooper3@xxxxxxxxxx, roger.pau@xxxxxxxxxx, jun.nakajima@xxxxxxxxx, kevin.tian@xxxxxxxxx
- Delivery-date: Fri, 22 Jan 2021 18:31:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 1/22/21 4:52 AM, Julien Grall wrote:
> Hi Boris,
>
> On 20/01/2021 22:49, Boris Ostrovsky wrote:
>> This option allows guest administrator specify what should happen when
>> guest accesses an MSR which is not explicitly emulated by the hypervisor.
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
>> ---
>> docs/man/xl.cfg.5.pod.in | 20 +++++++++++++++++++-
>> tools/libs/light/libxl_types.idl | 7 +++++++
>> tools/xl/xl_parse.c | 7 +++++++
>> 3 files changed, 33 insertions(+), 1 deletion(-)
>>
>> diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
>> index c8e017f950de..96ce97c42cab 100644
>> --- a/docs/man/xl.cfg.5.pod.in
>> +++ b/docs/man/xl.cfg.5.pod.in
>> @@ -2044,7 +2044,25 @@ Do not provide a VM generation ID.
>> See also "Virtual Machine Generation ID" by Microsoft:
>>
>> L<https://docs.microsoft.com/en-us/windows/win32/hyperv_v2/virtual-machine-generation-identifier>
>> -=back
>> +=over
>> +
>> +=item B<ignore_msrs="STRING">
>> +
>> +Determine hypervisor behavior on accesses to MSRs that are not emulated by
>> the hypervisor.
>
> The description of the feature looks very x86 focus. Yet, it seems to be
> defined as a generic one.
>
> Could you clarify whether this is intended to be re-usable by other
> architectures?
x86 only. I'll add appropriate note.
-boris
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