METHOD AND APPARATUS FOR PERFORMING PROTECTED WALK BASED SHADOW PAGING
PWSP method includes storing a multiple level page tables structure in second stage page tables (S2). The method includes: when an S2 entry is marked with a writable attribute: (i) permitting an operating system (OS) to write to S1, (ii) blocking an MMU from reading the S1 for translation, and (iii)...
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| creator | Azab Ahmed M Swidowski Kirk R |
| description | PWSP method includes storing a multiple level page tables structure in second stage page tables (S2). The method includes: when an S2 entry is marked with a writable attribute: (i) permitting an operating system (OS) to write to S1, (ii) blocking an MMU from reading the S1 for translation, and (iii) in response, verifying the S1 for translation and changing the marking of the S2 entry to read-only attribute, enabling the MMU to subsequently read the S1. The method includes: when the S2 entry is marked with the read-only attribute: (i) permitting the OS to read the S1 for translating from a virtual address to an intermediate physical address, (ii) blocking the OS from writing to the S1, and (iii) in response to blocking the OS, updating the S1 and changing the marking of the S2 entry to the device memory attribute, enabling the OS to write to the S1. |
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| subjects | CALCULATING CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE |
| title | METHOD AND APPARATUS FOR PERFORMING PROTECTED WALK BASED SHADOW PAGING |
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