公开(公告)号：US11188378B2

公开(公告)日：2021-11-30

申请号：US16801790

申请日：2020-02-26

Applicant: ARM IP Limited

Inventor： Milosch Meriac ,  Alessandro Angelino

IPC: G06F9/48 ,  G06F9/46 ,  G06F9/50

Abstract: The machine implemented method for operating at least one electronic system comprises detecting a pattern of use of plural control parameters in a path through a graph of operational context switches to reach a target operational context; storing a representation of the pattern in association with an indicator identifying the target operational context; responsive to detecting at least one of a request for a switch of operation from a source operational context to the target operational context, a trapping on a resource access, and a detection of a breakpoint, retrieving the representation in accordance with the indicator identifying the target operational context; and responsive to the retrieving, applying at least one control parameter to said at least one electronic system to match the pattern.

公开(公告)号：US11157613B2

公开(公告)日：2021-10-26

申请号：US15982582

申请日：2018-05-17

Applicant: Arm IP Limited

Inventor： Niklas Lennart Hauser ,  Brendan James Moran ,  Milosch Meriac

IPC: G06F12/14 ,  G06F21/55 ,  G06F8/65 ,  G06F1/3212 ,  G06F9/4401 ,  G06F1/3234

Abstract: Broadly speaking, the present techniques provide methods, apparatus and systems for monitoring operation of a device. More particularly, the present techniques provide methods for monitoring operation of a device based on a device firmware update that is associated with at least one power profile.

公开(公告)号：US11150891B2

公开(公告)日：2021-10-19

申请号：US16704048

申请日：2019-12-05

Applicant: ARM IP LIMITED

Inventor： James Crosby ,  Hugo John Martin Vincent ,  Milosch Meriac ,  Marcus Chang

IPC: G06F8/658 ,  G06F8/654 ,  G06F8/656 ,  G06F3/06 ,  G06F8/65

Abstract: A data processing device has a processor which executes software directly from non-volatile memory. The processor has a runtime component which dynamically maps software element identifiers specified by the software to corresponding software elements in memory. Mapping information is used to determine which software elements identifiers correspond to which software elements. This provides a level of indirection which can be used to make software updates more efficient, by updating only parts of the software while leaving old parts of the software as they are. Updated software elements can be stored to memory and the mapping information updated to point to the new elements, while existing mappings may be retained.

公开(公告)号：US11108779B2

公开(公告)日：2021-08-31

申请号：US15433297

申请日：2017-02-15

Applicant: ARM IP Limited

Inventor： Milosch Meriac

IPC: H04L29/06 ,  G06F9/4401 ,  H04W84/18 ,  H04W12/082 ,  H04L29/08 ,  H04W12/61

Abstract: Broadly speaking, embodiments of the present techniques provide methods and apparatus to implement a time-limited configuration settings hierarchy. The time-limited configuration settings hierarchy introduces a temporary override setting that allows a fail-back to a prior setting after the expiry of a time period. This allows temporary users of IoT devices to have much higher levels of privilege over configuration settings, as an automatic revocation of the permission and reversion to the previous settings is guaranteed on the expiry of the specified time period.

公开(公告)号：US10891146B2

公开(公告)日：2021-01-12

申请号：US15304302

申请日：2015-04-20

Applicant: ARM IP LIMITED

Inventor： Milosch Meriac ,  Hugo John Martin Vincent ,  James Crosby

IPC: G06F9/455 ,  G06F21/74 ,  G06F12/14 ,  G06F9/46 ,  G06F9/54 ,  G06F21/60

Abstract: A data processing system operates in a plurality of modes including a first privilege mode and a second privilege mode with the first privilege mode giving rights of access that are not available in the second privilege mode. Application code executes in the second privilege mode and generates function calls to hypervisor code which executes in the first privilege mode. These function calls are to perform a secure function requiring the rights of access which are only available in the first privilege mode. Scheduling code which executes in the second privilege mode controls scheduling of both the application code and the hypervisor code. Memory protection circuitry operating with physical addresses serves to control access permissions required to access different regions within the memory address space using configuration data which is written by the hypervisor code. The hypervisor code temporarily grants access to different regions within the physical memory address space to the system in the second privilege mode as needed to support the execution of code scheduled by the scheduling code.

公开(公告)号：US10735428B2

公开(公告)日：2020-08-04

申请号：US16149796

申请日：2018-10-02

Applicant: ARM IP Limited ,  ARM Limited

Inventor： Milosch Meriac ,  Geraint Luff ,  William Allen Curtis ,  Remy Pottier

IPC: H04L29/06 ,  H04W12/02 ,  H04L29/08

Abstract: In one example, a method includes obtaining, by a data processing device, first secret data associated with a first user and corresponding to a first location of a remote resource. The method further includes generating, using the first secret data, a first uniform resource locator (URL) usable to obtain the first location, and accessing the first location using the first URL. The method further includes obtaining, in response to transfer of usage rights of the data processing device from the first user to a second user, second secret data associated with the second user and corresponding to a second location of the remote resource. The method further includes generating, using the second secret data, a second URL usable to obtain the second location, and accessing the second location using the second URL. The second location is inaccessible via the first URL. The first location is inaccessible via the second URL.

公开(公告)号：US10657086B2

公开(公告)日：2020-05-19

申请号：US16303305

申请日：2017-05-26

Applicant: Arm IP Limited

Inventor： Milosch Meriac ,  Alessandro Angelino

IPC: G06F13/26 ,  G06F9/48 ,  G06F21/62

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.

公开(公告)号：US10530586B2

公开(公告)日：2020-01-07

申请号：US15516766

申请日：2015-09-22

Applicant: ARM IP Limited

Inventor： Milosch Meriac ,  Geraint Luff

IPC: H04L29/00 ,  H04L9/32 ,  H04L9/14 ,  H04L9/30 ,  H04L29/06 ,  H04W12/04 ,  H04W12/06

Abstract: A method of generating a shortcut certificate for authenticating a user digital certificate generated by an issuing certification authority; the method comprising: authenticating the digital certificate of the issuing certification authority; creating the shortcut certificate for the digital certificate of the issuing certification authority when the digital certificate of the issuing certification authority is authenticated; wherein the shortcut certificate comprises a signed entry of an authentication of the issuing certification authority.

公开(公告)号：US20190074978A1

公开(公告)日：2019-03-07

申请号：US16183445

申请日：2018-11-07

Applicant: ARM IP Limited

Inventor： Geraint David Luff ,  Milosch Meriac

IPC: H04L9/32 ,  H04L29/08 ,  G16H10/65 ,  G16H80/00 ,  G06F12/0813 ,  G06F17/30 ,  G06F19/00 ,  G06F21/62 ,  H04L29/06 ,  H04L9/30 ,  H04L9/14

Abstract: A method of accessing a remote resource (4) from a data processing device (2) includes obtaining a first URL corresponding to the remote resource (4), obtaining secret data corresponding to the first URL, using the secret data to generate an obscured URL at the data processing device (2), and accessing the remote resource using the obscured URL. This allows the user of the device (2) to see a first URL which is intelligible and provides useful information about the device, without sharing that information with the network. The obscured URL identifies the actual location of the remote resource and can be an unintelligible stream of digits or letters.

公开(公告)号：US20190036928A1

公开(公告)日：2019-01-31

申请号：US16149796

申请日：2018-10-02

Applicant: ARM IP Limited ,  ARM Limited

Inventor： Milosch Meriac ,  Geraint Luff ,  William Allen Curtis ,  Remy Pottier

IPC: H04L29/06 ,  H04L29/08 ,  H04W12/02

Abstract: In one example, a method includes obtaining, by a data processing device, first secret data associated with a first user and corresponding to a first location of a remote resource. The method further includes generating, using the first secret data, a first uniform resource locator (URL) usable to obtain the first location, and accessing the first location using the first URL. The method further includes obtaining, in response to transfer of usage rights of the data processing device from the first user to a second user, second secret data associated with the second user and corresponding to a second location of the remote resource. The method further includes generating, using the second secret data, a second URL usable to obtain the second location, and accessing the second location using the second URL. The second location is inaccessible via the first URL. The first location is inaccessible via the second URL.