Hello,
I am working with a port of FreeRTOS on Arm64 soc , which is running at EL1, my goal is to perform a function call that will execute in EL0,
I have come to understand that the only way for the EL switch is to set the correct M bits of the spsr_el1…
Hi ARM folks, hoping someone can show me where I'm going wrong programming the MMU. The ESR_EL1 reports that it is a Permission fault, level 2. Here's what I'm trying to accomplish:
4GiB space, 4kiB granule flat identity mapped, divided like…
I have successfully moved from EL3 to EL2. After doing some initialization I am trying to move from EL2 into EL1 with a very simple guest image. My process looks like:
Hi,
I am experimenting execution level switching on A53. I go from EL3->El2, then call SMC instruction to return to EL3. As soon as SMC instruction is executed, the processor enters EL3 mode and an exception is generated.
I have written an exception…
Hi Experts,
ARMv8 MMU TTBRn_ELx registers are banked by exception level.
In "DDI0487A_b_armv8_arm.pdf" page 1640, the controlling register of secure EL1&0 stage1 is TTBR0_EL1
and Non-secure…
Hi, arm experts,
We want to use ARCH32 mode in secure EL1, I see some descriptions in ARMv8 Arch Reference Manual about Secure EL1 ARCH32 mode as follows:
One is the VBAR(secure), it is mapped to VBAR_EL3, the other is SCTLR (secure), it is mapped to …
Hi all,
Nested virtualization is the ability to run a virtual machine inside another virtual machine. In other words, it’s about running a hypervisor (the guest hypervisor) on top of another hypervisor (the host hypervisor).
Reference: https://developer…
The Armv8-A architecture continues to evolve, with the additions developed through 2016 collectively known as Armv8.3-A. Grouping enhancements in this manner helps the ecosystem manage tools and software support alongside the large numbers of Armv8-A…
