[Patch v2 0/4] Protect against concurrent calls into UV BIOS

Changes since v1: Addressed comments from Bhupesh Sharma, Thomas Gleixner, and Ard Biesheuvel: * made __uv_bios_call() static * moved the efi_enabled() cleanup to its own patchlet * explained the reason for renaming the efi_runtime_lock semaphore * dropped the reviewed-bys as they should be

[Patch v2 1/4] efi/x86: turn EFI runtime semaphore into a global lock

Make efi_runtime_lock semaphore global so that it can be used by EFI runtime callers that may be defined outside efi/runtime-wrappers.c. Also now that efi_runtime_lock semaphore is no longer static, rename it to efi_runtime_sem so it doesn't clash with the efi_runtime_lock spinlock defined in

[Patch v2 4/4] x86/platform/UV: use efi_runtime_sem to serialise BIOS calls

Calls into UV firmware must be protected against concurrency, use the now visible efi_runtime_sem lock to serialise them. Cc: Russ Anderson Cc: Mike Travis Cc: Dimitri Sivanich Cc: Steve Wahl Cc: sta...@vger.kernel.org Signed-off-by: Hedi Berriche --- arch/x86/include/asm/uv/bios.h | 3 ++-

[Patch v2 2/4] x86/platform/UV: kill uv_bios_call_reentrant() as it has no callers

uv_bios_call_reentrant() has no callers nor is it exported, kill it. Cc: Russ Anderson Cc: Mike Travis Cc: Dimitri Sivanich Cc: Steve Wahl Cc: sta...@vger.kernel.org Signed-off-by: Hedi Berriche --- arch/x86/include/asm/uv/bios.h | 1 - arch/x86/platform/uv/bios_uv.c | 12 2