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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2018-11-14 09:55:43 -0800
committerIngo Molnar <mingo@kernel.org>2018-11-15 10:04:46 +0100
commiteff896288872d687d9662000ec9ae11b6d61766f (patch)
tree87714359c17406ff59e8d30e78c9213cea1bec27 /arch
parent72a58a63a164b4e9d2d914e65caeb551846883f1 (diff)
downloadlinux-eff896288872d687d9662000ec9ae11b6d61766f.tar.bz2
efi/arm: Defer persistent reservations until after paging_init()
The new memory EFI reservation feature we introduced to allow memory reservations to persist across kexec may trigger an unbounded number of calls to memblock_reserve(). The memblock subsystem can deal with this fine, but not before memblock resizing is enabled, which we can only do after paging_init(), when the memory we reallocate the array into is actually mapped. So break out the memreserve table processing into a separate routine and call it after paging_init() on arm64. On ARM, because of limited reviewing bandwidth of the maintainer, we cannot currently fix this, so instead, disable the EFI persistent memreserve entirely on ARM so we can fix it later. Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20181114175544.12860-5-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/setup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 953e316521fc..f4fc1e0544b7 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -313,6 +313,7 @@ void __init setup_arch(char **cmdline_p)
arm64_memblock_init();
paging_init();
+ efi_apply_persistent_mem_reservations();
acpi_table_upgrade();