公开(公告)号：US20190073481A1

公开(公告)日：2019-03-07

申请号：US16113241

申请日：2018-08-27

Applicant: Arm IP Limited

Inventor： Alessandro ANGELINO ,  Milosch MERIAC ,  Brendan James MORAN

IPC: G06F21/57 ,  G06F8/65

Abstract: An apparatus and methods are provided to defending device against attacks. When it is determined that a device is under attack, a determination is made as to whether a layout of objects within said at least one resource at said device is protecting said device against said attack. The determination is then transferred to a remote server together with a layout of the resource at the device. When it is determined that the layout of objects within the at least one resource at the device is not protecting the device against the attack, then the layout of the at least one resource is changed. Either the remote server or the device may determine whether to change the layout in response to the attack.

公开(公告)号：US20180218150A1

公开(公告)日：2018-08-02

申请号：US15578387

申请日：2016-05-31

Applicant: Arm IP Limited

Inventor： Alessandro ANGELINO ,  Milosch MERIAC

IPC: G06F21/54 ,  G06F21/74 ,  G06F21/78

CPC classification number: G06F21/54 ,  G06F8/63 ,  G06F8/654 ,  G06F21/50 ,  G06F21/51 ,  G06F21/52 ,  G06F21/572 ,  G06F21/70 ,  G06F21/71 ,  G06F21/74 ,  G06F21/78 ,  G06F21/79 ,  G06F2009/45583

Abstract: A data processing apparatus having a first secure area and a second secure area coupled by a monitor is provided. The monitor applies security credentials to processing circuitry transitioning from the first secure area to the second secure area to enable the processing circuitry to perform functions in the second secure area. A call gateway comprising a transition instruction and access parameters stored in a trusted storage device is used by the monitor to determine when to applying the security credentials to the processing circuitry. The access parameters comprising a target function or a memory location.

公开(公告)号：US20190213329A1

公开(公告)日：2019-07-11

申请号：US16303291

申请日：2017-04-06

Applicant: Arm IP Limited

Inventor： Milosch MERIAC ,  Alessandro ANGELINO

IPC: G06F21/55 ,  G06F9/46 ,  G06F9/455 ,  G06F1/24

CPC classification number: G06F21/556 ,  G06F1/24 ,  G06F9/455 ,  G06F9/461 ,  G06F2221/031

Abstract: A technology for mutually isolating accessors of a shared electronic device from leakage of context data after a context switch comprises: on making the shared electronic device available to the plurality of accessors, establishing a portion of storage as an indicator location for the shared electronic device; when a first accessor requests use of the shared electronic device, writing at least one device-reset-required indicator to the indicator location; on switching context to a new context, after context save, when a second accessor requests use of the shared electronic device, resetting context data of the shared electronic device to a known state and reconciling the first device-reset-required indicator and a second device-reset-required indicator for the new context.

公开(公告)号：US20190213038A1

公开(公告)日：2019-07-11

申请号：US16303305

申请日：2017-05-26

Applicant: Arm IP Limited

Inventor： Milosch MERIAC ,  Alessandro ANGELINO

IPC: G06F9/48 ,  G06F21/62

CPC classification number: G06F9/4837 ,  G06F9/4812 ,  G06F9/4887 ,  G06F21/6209

Abstract: A machine implemented method for prioritizing system interrupts in a processing system is provided. The method comprising: determining, at a supervisor module, for each interrupt, a relative interrupt priority in accordance with at least one interrupt parameter for said interrupt; prioritising, at said supervisor module, each said interrupt with respect to other interrupts of said system in compliance with said determined relative interrupt priority; and in response to a change to said at least one interrupt parameter during operation of said system, adjusting said determined relative interrupt priority, and re-prioritising each said interrupt with respect to said other interrupts of said system in compliance with said adjusted relative interrupt priority.