Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 1a4c4fb5a76fb15a5a50706685dc4ba36f1c2260
https://github.com/tianocore/edk2/commit/1a4c4fb5a76fb15a5a50706685dc4ba36f1c2260
Author: Vishnu Pajjuri <[email protected]>
Date: 2026-01-07 (Wed, 07 Jan 2026)
Changed paths:
M UefiCpuPkg/Library/ArmMmuLib/AArch64/ArmMmuLibCore.c
Log Message:
-----------
ArmPkg, UefiCpuPkg: Fix boot failure on FEAT_LPA-only systems without LPA2
Commit 9077163 added support for 52-bit PA/VA (LPA2) in EDK2. The previous
change treated the presence of FEAT_LPA as sufficient to enable 52-bit
VA for 4K page granularity. Some platforms advertise FEAT_LPA but do not
implement full LPA2 support for 4K PAGE_SIZE; enabling 52-bit VA on
those platforms produced an invalid MMU configuration and caused boot
failures.
This patch tightens the detection logic so 52-bit PA/VA (LPA2) is enabled
only when the platform explicitly advertises LPA2 support. When LPA2 is
not present we fall back to the previous 48-bit address limit for 4K
pages, preserving correct behavior on non-LPA2 systems.
Fixes: 9077163 ("UefiCpuPkg/ArmMmuLib: Add support for LPA2")
Co-authored-by: Ganapatrao Kulkarni <[email protected]>
Signed-off-by: Vishnu Pajjuri <[email protected]>
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