efi: make efi_mem_type() and efi_mem_attributes() work on Xen PV

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Xen doesn't give direct access to the EFI memory map, but provides a
hypercall interface for it. efi_mem_desc_lookup() was already adjusted
in aca1d27ac3 "efi: xen: Implement memory descriptor lookup based on
hypercall" to (optionally) use it. Now make efi_mem_type() and
efi_mem_attributes() use common efi_mem_desc_lookup() too.
This also reduces code duplication a bit.
efi_mem_type() retains separate check for -ENOTSUPP error case (even
though no caller seems to rely on this currently).

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
[ardb: Drop erroneous 'const' qualifier]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

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Marek Marczykowski-Górecki 2026-03-09 13:17:22 +01:00 • committed by Ard Biesheuvel

parent 1f318b96cc

commit 80e80a703e

1 changed files with 9 additions and 18 deletions

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drivers/firmware/efi/efi.c

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