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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-12 23:26:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-12 23:26:49 +0300
commite6412f9833db23740ee848ab3d6e7af18dff82a6 (patch)
treec718a1ed9a631e01c226a25910a6939342a387b2 /arch/arm/include/asm
parented016af52ee3035b4799ebd7d53f9ae59d5782c4 (diff)
parent4d0a4388ccdd9482fef6b26f879d0f6099143f80 (diff)
downloadlinux-e6412f9833db23740ee848ab3d6e7af18dff82a6.tar.xz
Merge tag 'efi-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI changes from Ingo Molnar: - Preliminary RISC-V enablement - the bulk of it will arrive via the RISCV tree. - Relax decompressed image placement rules for 32-bit ARM - Add support for passing MOK certificate table contents via a config table rather than a EFI variable. - Add support for 18 bit DIMM row IDs in the CPER records. - Work around broken Dell firmware that passes the entire Boot#### variable contents as the command line - Add definition of the EFI_MEMORY_CPU_CRYPTO memory attribute so we can identify it in the memory map listings. - Don't abort the boot on arm64 if the EFI RNG protocol is available but returns with an error - Replace slashes with exclamation marks in efivarfs file names - Split efi-pstore from the deprecated efivars sysfs code, so we can disable the latter on !x86. - Misc fixes, cleanups and updates. * tag 'efi-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits) efi: mokvar: add missing include of asm/early_ioremap.h efi: efivars: limit availability to X86 builds efi: remove some false dependencies on CONFIG_EFI_VARS efi: gsmi: fix false dependency on CONFIG_EFI_VARS efi: efivars: un-export efivars_sysfs_init() efi: pstore: move workqueue handling out of efivars efi: pstore: disentangle from deprecated efivars module efi: mokvar-table: fix some issues in new code efi/arm64: libstub: Deal gracefully with EFI_RNG_PROTOCOL failure efivarfs: Replace invalid slashes with exclamation marks in dentries. efi: Delete deprecated parameter comments efi/libstub: Fix missing-prototypes in string.c efi: Add definition of EFI_MEMORY_CPU_CRYPTO and ability to report it cper,edac,efi: Memory Error Record: bank group/address and chip id edac,ghes,cper: Add Row Extension to Memory Error Record efi/x86: Add a quirk to support command line arguments on Dell EFI firmware efi/libstub: Add efi_warn and *_once logging helpers integrity: Load certs from the EFI MOK config table integrity: Move import of MokListRT certs to a separate routine efi: Support for MOK variable config table ...
Diffstat (limited to 'arch/arm/include/asm')
-rw-r--r--arch/arm/include/asm/efi.h23
1 files changed, 11 insertions, 12 deletions
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 5dcf3c6011b7..3ee4f4381985 100644
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -66,25 +66,24 @@ static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
#define MAX_UNCOMP_KERNEL_SIZE SZ_32M
/*
- * The kernel zImage should preferably be located between 32 MB and 128 MB
- * from the base of DRAM. The min address leaves space for a maximal size
- * uncompressed image, and the max address is due to how the zImage decompressor
- * picks a destination address.
+ * 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.
*/
-#define ZIMAGE_OFFSET_LIMIT SZ_128M
-#define MIN_ZIMAGE_OFFSET MAX_UNCOMP_KERNEL_SIZE
+#define EFI_PHYS_ALIGN SZ_16M
-/* on ARM, the FDT should be located in the first 128 MB of RAM */
-static inline unsigned long efi_get_max_fdt_addr(unsigned long dram_base)
+/* 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 dram_base + ZIMAGE_OFFSET_LIMIT;
+ return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
}
/* on ARM, the initrd should be loaded in a lowmem region */
-static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
- unsigned long image_addr)
+static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{
- return dram_base + SZ_512M;
+ return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
}
struct efi_arm_entry_state {