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a37dac5c5d
mirror_ubuntu-kernels/drivers/firmware/efi/libstub
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Ard Biesheuvel a37dac5c5d arm64: efi: Limit allocations to 48-bit addressable physical region 
The UEFI spec does not mention or reason about the configured size of
the virtual address space at all, but it does mention that all memory
should be identity mapped using a page size of 4 KiB.

This means that a LPA2 capable system that has any system memory outside
of the 48-bit addressable physical range and follows the spec to the
letter may serve page allocation requests from regions of memory that
the kernel cannot access unless it was built with LPA2 support and
enables it at runtime.

So let's ensure that all page allocations are limited to the 48-bit
range.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2022-12-07 19:50:44 +01:00
..
alignedmem.c arm64: efi: Limit allocations to 48-bit addressable physical region 2022-12-07 19:50:44 +01:00
arm32-stub.c efi: libstub: Move screen_info handling to common code 2022-11-09 12:42:02 +01:00
arm64-entry.S efi/arm64: libstub: Split off kernel image relocation for builtin stub 2022-11-09 12:42:03 +01:00
arm64-stub.c arm64: efi: Limit allocations to 48-bit addressable physical region 2022-12-07 19:50:44 +01:00
arm64.c Merge tag 'efi-zboot-direct-for-v6.2' into efi/next 2022-11-18 09:13:57 +01:00
efi-stub-entry.c efi: libstub: Factor out EFI stub entrypoint into separate file 2022-11-09 12:42:03 +01:00
efi-stub-helper.c efi: libstub: Always enable initrd command line loader and bump version 2022-12-01 16:08:18 +01:00
efi-stub.c efi: libstub: Factor out EFI stub entrypoint into separate file 2022-11-09 12:42:03 +01:00
efistub.h arm64: efi: Limit allocations to 48-bit addressable physical region 2022-12-07 19:50:44 +01:00
fdt.c efi: runtime: Don't assume virtual mappings are missing if VA == PA == 0 2022-10-21 11:09:41 +02:00
file.c efi: libstub: Add mixed mode support to command line initrd loader 2022-11-18 09:14:08 +01:00
gop.c efi/gop: Add an option to list out the available GOP modes 2020-05-20 19:09:20 +02:00
intrinsics.c efi: libstub: Clone memcmp() into the stub 2022-11-09 12:42:02 +01:00
loongarch-stub.c efi/loongarch: libstub: Split off kernel image relocation for builtin stub 2022-11-09 12:42:03 +01:00
loongarch.c efi/loongarch: libstub: Split off kernel image relocation for builtin stub 2022-11-09 12:42:03 +01:00
Makefile Merge tag 'efi-zboot-direct-for-v6.2' into efi/next 2022-11-18 09:13:57 +01:00
Makefile.zboot efi: libstub: Add image code and data size to the zimage metadata 2022-11-09 12:42:03 +01:00
mem.c arm64: efi: Limit allocations to 48-bit addressable physical region 2022-12-07 19:50:44 +01:00
pci.c efi/libstub: Correct comment typos 2020-05-06 11:27:55 +02:00
printk.c efi: libstub: Enable efi_printk() in zboot decompressor 2022-11-09 12:42:02 +01:00
random.c efi: stub: use random seed from EFI variable 2022-12-01 09:51:21 +01:00
randomalloc.c arm64: efi: Limit allocations to 48-bit addressable physical region 2022-12-07 19:50:44 +01:00
relocate.c efi: libstub: install boot-time memory map as config table 2022-09-27 13:22:49 +02:00
riscv-stub.c efi/riscv: libstub: Split off kernel image relocation for builtin stub 2022-11-09 12:42:03 +01:00
riscv.c efi/riscv: libstub: Split off kernel image relocation for builtin stub 2022-11-09 12:42:03 +01:00
screen_info.c efi: libstub: Move screen_info handling to common code 2022-11-09 12:42:02 +01:00
secureboot.c efi: libstub: check Shim mode using MokSBStateRT 2022-09-22 10:15:44 +02:00
skip_spaces.c efi/libstub: Fix missing-prototype warning for skip_spaces() 2020-06-15 19:43:58 +02:00
smbios.c arm64: efi: Force the use of SetVirtualAddressMap() on Altra machines 2022-11-10 23:14:14 +01:00
string.c efi: libstub: Provide local implementations of strrchr() and memchr() 2022-11-09 12:42:02 +01:00
systable.c efi/libstub: move efi_system_table global var into separate object 2022-09-19 11:19:35 +02:00
tpm.c More EFI changes for v5.8: 2020-05-25 15:11:14 +02:00
vsprintf.c isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
x86-stub.c efi: libstub: Give efi_main() asmlinkage qualification 2022-10-21 11:09:40 +02:00
zboot-header.S efi: Put Linux specific magic number in the DOS header 2022-12-05 09:31:46 +01:00
zboot.c efi: libstub: Merge zboot decompressor with the ordinary stub 2022-11-09 12:42:04 +01:00
zboot.lds efi: libstub: Fix incorrect payload size in zboot header 2022-10-21 11:09:41 +02:00