Commit fa7bee86 authored by Demi Marie Obenour's avatar Demi Marie Obenour Committed by Ard Biesheuvel
Browse files

efi: Warn if trying to reserve memory under Xen 



Doing so cannot work and should never happen.

Signed-off-by: default avatarDemi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: default avatarMarek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 01de145d

drivers/firmware/efi/efi.c

+4 −0
Original line number Diff line number Diff line
@@ -541,6 +541,10 @@ void __init __weak efi_arch_mem_reserve(phys_addr_t addr, u64 size) {} 
 */

void __init efi_mem_reserve(phys_addr_t addr, u64 size)

{

	/* efi_mem_reserve() does not work under Xen */

	if (WARN_ON_ONCE(efi_enabled(EFI_PARAVIRT)))

		return;



	if (!memblock_is_region_reserved(addr, size))

		memblock_reserve(addr, size);