Hello Russell,
On Fri, Feb 08, 2019 at 10:11:03PM +1100, Russell Currey wrote:
> Without restoring the IAMR after idle, execution prevention on POWER9
> with Radix MMU is overwritten and the kernel can freely execute userspace
> without
> faulting.
>
> This is necessary when returning from any
Russell Currey's on February 8, 2019 9:11 pm:
> Without restoring the IAMR after idle, execution prevention on POWER9
> with Radix MMU is overwritten and the kernel can freely execute userspace
> without
> faulting.
>
> This is necessary when returning from any stop state that modifies user
>
The changes look good to me.
On Fri, Feb 08, 2019 at 10:11:03PM +1100, Russell Currey wrote:
> Without restoring the IAMR after idle, execution prevention on POWER9
> with Radix MMU is overwritten and the kernel can freely execute userspace
> without
> faulting.
>
> This is necessary when
Without restoring the IAMR after idle, execution prevention on POWER9
with Radix MMU is overwritten and the kernel can freely execute userspace
without
faulting.
This is necessary when returning from any stop state that modifies user
state, as well as hypervisor state.
To test how this fails
