Re: [PATCH] xen/arm: do not setup the runstate info page if kpti is enabled

2020-09-30 Thread boris . ostrovsky
On 9/24/20 7:49 PM, Stefano Stabellini wrote: > From: Stefano Stabellini > > The VCPUOP_register_runstate_memory_area hypercall takes a virtual > address of a buffer as a parameter. The semantics of the hypercall are > such that the virtual address should always be valid. > > When KPTI is enabled

Re: [PATCH] xen/arm: do not setup the runstate info page if kpti is enabled

2020-09-25 Thread Bertrand Marquis
Hi, > On 25 Sep 2020, at 00:49, Stefano Stabellini wrote: > > From: Stefano Stabellini > > The VCPUOP_register_runstate_memory_area hypercall takes a virtual > address of a buffer as a parameter. The semantics of the hypercall are > such that the virtual address should always be valid. > > When

[PATCH] xen/arm: do not setup the runstate info page if kpti is enabled

2020-09-24 Thread Stefano Stabellini
From: Stefano Stabellini The VCPUOP_register_runstate_memory_area hypercall takes a virtual address of a buffer as a parameter. The semantics of the hypercall are such that the virtual address should always be valid. When KPTI is enabled and we are running userspace code, the virtual address is