Re: [Xen-devel] [PATCH v2 1/6] xen/arm: optee: impose limit on shared buffer size

2019-09-23 Thread Julien Grall
Hi Volodymyr, On 18/09/2019 19:50, Volodymyr Babchuk wrote: We want to limit number of calls to lookup_and_pin_guest_ram_addr() per one request. There are two ways to do this: either preempt translate_noncontig() or limit size of one shared buffer size. It is quite hard to preempt translate_non

[Xen-devel] [PATCH v2 1/6] xen/arm: optee: impose limit on shared buffer size

2019-09-18 Thread Volodymyr Babchuk
We want to limit number of calls to lookup_and_pin_guest_ram_addr() per one request. There are two ways to do this: either preempt translate_noncontig() or limit size of one shared buffer size. It is quite hard to preempt translate_noncontig(), because it is deep nested. So we chose the second opt