Re: [PATCH v4 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips

2021-03-08 Thread Boris Brezillon
On Mon, 8 Mar 2021 19:01:34 +0530 Manivannan Sadhasivam wrote: > On Mon, Mar 08, 2021 at 10:10:59AM +0100, Boris Brezillon wrote: > > On Mon, 8 Mar 2021 11:14:46 +0530 > > Manivannan Sadhasivam wrote: > > > > > On a typical end product, a vendor may choose to secure some regions in > > >

Re: [PATCH v4 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips

2021-03-08 Thread Manivannan Sadhasivam
On Mon, Mar 08, 2021 at 10:10:59AM +0100, Boris Brezillon wrote: > On Mon, 8 Mar 2021 11:14:46 +0530 > Manivannan Sadhasivam wrote: > > > On a typical end product, a vendor may choose to secure some regions in > > the NAND memory which are supposed to stay intact between FW upgrades. > > The

Re: [PATCH v4 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips

2021-03-08 Thread Boris Brezillon
On Mon, 8 Mar 2021 11:14:46 +0530 Manivannan Sadhasivam wrote: > On a typical end product, a vendor may choose to secure some regions in > the NAND memory which are supposed to stay intact between FW upgrades. > The access to those regions will be blocked by a secure element like > Trustzone.

[PATCH v4 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips

2021-03-07 Thread Manivannan Sadhasivam
On a typical end product, a vendor may choose to secure some regions in the NAND memory which are supposed to stay intact between FW upgrades. The access to those regions will be blocked by a secure element like Trustzone. So the normal world software like Linux kernel should not touch these