diff options
| -rw-r--r-- | arch/arm64/kernel/acpi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 4d529ff7ba51..b3195b3b895f 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -357,6 +357,16 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) * as long as we take care not to create a writable * mapping for executable code. */ + fallthrough; + + case EFI_ACPI_MEMORY_NVS: + /* + * ACPI NVS marks an area reserved for use by the + * firmware, even after exiting the boot service. + * This may be used by the firmware for sharing dynamic + * tables/data (e.g., ACPI CCEL) with the OS. Map it + * as read-only. + */ prot = PAGE_KERNEL_RO; break; |