3945_arm_cca_v5_s3: Initial patches for enabling RME support#12380
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3945_arm_cca_v5_s3: Initial patches for enabling RME support#12380mergify[bot] merged 4 commits intotianocore:masterfrom
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PR can not be merged due to conflict. Please rebase and resubmit |
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@leiflindholm If there are no further comments, can we merge this branch, please? |
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Add helper function to check if the Realm Management Extension (RME) is implemented by the hardware. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Leif Lindholm <leif.lindholm@oss.qualcomm.com> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
When creating the identity mapping, copy the 'unprotected' top bit from the physical address as an attribute in the PTE. The virtual address then points to the top half of the address space, which in a Realm is the unprotected half, shared with the host. Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Arm CCA requires the software in a Realm to treat the most significant bit of an IPA as a protection attribute. To enable/disable sharing of memory regions with the host, the protection attribute needs to be set/cleared accordingly. Therefore, introduce ArmCcaSetMemoryProtectionAttribute() so that the memory regions can be shared/unshared with the host. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Leif Lindholm <leif.lindholm@oss.qualcomm.com> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
The PrePiMemoryAllocationLib supports AllocateAlignedPages(), however is missing the corresponding FreeAlignedPages(). Although the FreeAlignedPages() in PrePiMemoryAllocationLib does not support the ability to free pages in the PrePei Memory Allocator and the allocated memory is lost, it would be good to have an empty implementation of FreeAlignedPages() so that implementations utilises the correct deallocation function. Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
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Yeah, I think others have had enough of an opportunity to comment. |
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Initial patches for enabling RME support
This is an initial set of patches that:
Note: This is a PR series that includes patches from PR #12224
How This Was Tested
Only build tested. Actual functionality can only be tested when the remaining patches from PR #12224 are integrated in the future.
Integration Instructions
N/A