u-boot-qcom: enable EFI runtime variable store for efivar#2513
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u-boot-qcom: enable EFI runtime variable store for efivar#2513ricardosalveti wants to merge 1 commit into
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Enable CONFIG_EFI_RT_VOLATILE_STORE so U-Boot supports SetVariable at runtime on its in-RAM EFI variable backend. With this U-Boot advertises EFI_RT_SUPPORTED_SET_VARIABLE in the RT properties table and creates the RTStorageVolatile and VarToFile EFI variables. These variables are what userspace needs to persist runtime EFI variable changes: RTStorageVolatile names the variable store file relative to the ESP (ubootefi.var) and VarToFile holds the binary dump of the variables to write back. The efivar SetVariableRT backport in oe-core uses them to sync changes to the ESP so they survive reboots; without this option SetVariable at runtime returns EFI_UNSUPPORTED and efivar cannot work. CONFIG_EFI_RT_VOLATILE_STORE depends on CONFIG_EFI_VARIABLE_FILE_STORE, so select that explicitly in the fragment to keep the option from being silently dropped should the dependency default ever change. Signed-off-by: Ricardo Salveti <ricardo.salveti@oss.qualcomm.com>
ricardosalveti
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Test Results 105 files 634 suites 4h 50m 5s ⏱️ Results for commit 038895c. ♻️ This comment has been updated with latest results. |
lumag
approved these changes
Jun 19, 2026
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Enable CONFIG_EFI_RT_VOLATILE_STORE so U-Boot supports SetVariable at runtime on its in-RAM EFI variable backend. With this U-Boot advertises EFI_RT_SUPPORTED_SET_VARIABLE in the RT properties table and creates the RTStorageVolatile and VarToFile EFI variables.
These variables are what userspace needs to persist runtime EFI variable changes: RTStorageVolatile names the variable store file relative to the ESP (ubootefi.var) and VarToFile holds the binary dump of the variables to write back. The efivar SetVariableRT backport in oe-core uses them to sync changes to the ESP so they survive reboots; without this option SetVariable at runtime returns EFI_UNSUPPORTED and efivar cannot work.
CONFIG_EFI_RT_VOLATILE_STORE depends on CONFIG_EFI_VARIABLE_FILE_STORE, so select that explicitly in the fragment to keep the option from being silently dropped should the dependency default ever change.