Merge tag 'efi_updates_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI updates from Borislav Petkov:
 "These got delayed due to a last minute ia64 build issue which got
  fixed in the meantime.

  EFI updates collected by Ard Biesheuvel:

   - Don't move BSS section around pointlessly in the x86 decompressor

   - Refactor helper for discovering the EFI secure boot mode

   - Wire up EFI secure boot to IMA for arm64

   - Some fixes for the capsule loader

   - Expose the RT_PROP table via the EFI test module

   - Relax DT and kernel placement restrictions on ARM

  with a few followup fixes:

   - fix the build breakage on IA64 caused by recent capsule loader
     changes

   - suppress a type mismatch build warning in the expansion of
     EFI_PHYS_ALIGN on ARM"

* tag 'efi_updates_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: arm: force use of unsigned type for EFI_PHYS_ALIGN
  efi: ia64: disable the capsule loader
  efi: stub: get rid of efi_get_max_fdt_addr()
  efi/efi_test: read RuntimeServicesSupported
  efi: arm: reduce minimum alignment of uncompressed kernel
  efi: capsule: clean scatter-gather entries from the D-cache
  efi: capsule: use atomic kmap for transient sglist mappings
  efi: x86/xen: switch to efi_get_secureboot_mode helper
  arm64/ima: add ima_arch support
  ima: generalize x86/EFI arch glue for other EFI architectures
  efi: generalize efi_get_secureboot
  efi/libstub: EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER should not default to yes
  efi/x86: Only copy the compressed kernel image in efi_relocate_kernel()
  efi/libstub/x86: simplify efi_is_native()

1 files changed, 11 insertions, 13 deletions

diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 3ee4f4381985..9de7ab2ce05d 100644
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -66,24 +66,17 @@ static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
 #define MAX_UNCOMP_KERNEL_SIZE	SZ_32M
 
 /*
- * phys-to-virt patching requires that the physical to virtual offset fits
- * into the immediate field of an add/sub instruction, which comes down to the
- * 24 least significant bits being zero, and so the offset should be a multiple
- * of 16 MB. Since PAGE_OFFSET itself is a multiple of 16 MB, the physical
- * base should be aligned to 16 MB as well.
+ * phys-to-virt patching requires that the physical to virtual offset is a
+ * multiple of 2 MiB. However, using an alignment smaller than TEXT_OFFSET
+ * here throws off the memory allocation logic, so let's use the lowest power
+ * of two greater than 2 MiB and greater than TEXT_OFFSET.
  */
-#define EFI_PHYS_ALIGN		SZ_16M
-
-/* on ARM, the FDT should be located in a lowmem region */
-static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
-{
-	return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
-}
+#define EFI_PHYS_ALIGN		max(UL(SZ_2M), roundup_pow_of_two(TEXT_OFFSET))
 
 /* on ARM, the initrd should be loaded in a lowmem region */
 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
 {
-	return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
+	return round_down(image_addr, SZ_4M) + SZ_512M;
 }
 
 struct efi_arm_entry_state {
@@ -93,4 +86,9 @@ struct efi_arm_entry_state {
 	u32	sctlr_after_ebs;
 };
 
+static inline void efi_capsule_flush_cache_range(void *addr, int size)
+{
+	__cpuc_flush_dcache_area(addr, size);
+}
+
 #endif /* _ASM_ARM_EFI_H */