On 09/05/17 15:49, Jan Beulich wrote:
On 08.05.17 at 17:48, wrote:
>> --- a/xen/arch/x86/x86_64/entry.S
>> +++ b/xen/arch/x86/x86_64/entry.S
>> @@ -233,12 +233,36 @@ UNLIKELY_END(msi_check)
>>
>> GET_CURRENT(bx)
>>
>> -/* Check that the callback is non-null. */
>> -
>>> On 08.05.17 at 17:48, wrote:
> --- a/xen/arch/x86/x86_64/entry.S
> +++ b/xen/arch/x86/x86_64/entry.S
> @@ -233,12 +233,36 @@ UNLIKELY_END(msi_check)
>
> GET_CURRENT(bx)
>
> -/* Check that the callback is non-null. */
> -leaq VCPU_int80_bounce(%rbx),%rdx
> -
The int80_bounce field of struct pv_vcpu is a bit of an odd special case,
because it is a simple derivation of trap_ctxt[0x80], which is also stored.
It is also the only use of {compat_,}create_bounce_frame() which isn't
referencing the plain trap_bounce field of struct pv_vcpu. (And altering thi
