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Cortex M7 MPU to prevent speculative access

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Lisha_Sweetha
Associate II

‎2024-11-07 10:25 PM - last edited on ‎2024-11-07 11:40 PM by

Why we Enable the Speculation default mode for MPU? Is there any reason to enable it? 

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SofLit
ST Employee

‎2024-11-07 11:39 PM - edited ‎2024-11-07 11:53 PM

Hello @Lisha_Sweetha and welcome to the community,

Please read these threads:

https://community.st.com/t5/stm32-mcus-embedded-software/information-about-mpu-settings-for-the-stm32h743/td-p/83830

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculation-on-stm32f767/td-p/728366

From ARM: https://developer.arm.com/documentation/ddi0489/f/memory-system/speculative-accesses

Hope it helps.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
PS: This is NOT an online support (https://ols.st.com) but a collaborative space. So please be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help/support.

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SofLit
ST Employee

‎2024-11-07 11:39 PM - edited ‎2024-11-07 11:53 PM

Hello @Lisha_Sweetha and welcome to the community,

Please read these threads:

https://community.st.com/t5/stm32-mcus-embedded-software/information-about-mpu-settings-for-the-stm32h743/td-p/83830

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculation-on-stm32f767/td-p/728366

From ARM: https://developer.arm.com/documentation/ddi0489/f/memory-system/speculative-accesses

Hope it helps.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
PS: This is NOT an online support (https://ols.st.com) but a collaborative space. So please be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help/support.
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