On 12/12/2018 17:34, Dave Martin wrote:
> On Mon, Dec 10, 2018 at 02:30:43PM +, Vincenzo Frascino wrote:
>> On arm64 the TCR_EL1.TBI0 bit has been set since Linux 3.x hence
>> the userspace (EL0) is allowed to set a non-zero value in the
>> top byte but the resulting pointers are not allowed at
On Mon, Dec 10, 2018 at 02:30:43PM +, Vincenzo Frascino wrote:
> On arm64 the TCR_EL1.TBI0 bit has been set since Linux 3.x hence
> the userspace (EL0) is allowed to set a non-zero value in the
> top byte but the resulting pointers are not allowed at the
> user-kernel syscall ABI boundary.
>
>
On arm64 the TCR_EL1.TBI0 bit has been set since Linux 3.x hence
the userspace (EL0) is allowed to set a non-zero value in the
top byte but the resulting pointers are not allowed at the
user-kernel syscall ABI boundary.
With the relaxed ABI proposed through this document, it is now possible
to pas
