diff options
| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2018-07-23 10:57:31 +0900 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-07-23 15:34:11 +0100 |
| commit | 20d12cf990618845e76d3f24daaebd15d65a5e46 (patch) | |
| tree | 3914dcd12cd8d9fdcb82aaf07201dba65f71e129 /drivers/firmware/efi | |
| parent | 3ea86495aef2f6de26b7cb1599ba350dd6a0c521 (diff) | |
efi/arm: map UEFI memory map even w/o runtime services enabled
Under the current implementation, UEFI memory map will be mapped and made
available in virtual mappings only if runtime services are enabled.
But in a later patch, we want to use UEFI memory map in acpi_os_ioremap()
to create mappings of ACPI tables using memory attributes described in
UEFI memory map.
See the following commit:
arm64: acpi: fix alignment fault in accessing ACPI tables
So, as a first step, arm_enter_runtime_services() is modified, alongside
Ard's patch[1], so that UEFI memory map will not be freed even if
efi=noruntime.
[1] https://marc.info/?l=linux-efi&m=152930773507524&w=2
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/firmware/efi')
| -rw-r--r-- | drivers/firmware/efi/arm-runtime.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c index 4712445c3213..922cfb813109 100644 --- a/drivers/firmware/efi/arm-runtime.c +++ b/drivers/firmware/efi/arm-runtime.c @@ -117,6 +117,13 @@ static int __init arm_enable_runtime_services(void) efi_memmap_unmap(); + mapsize = efi.memmap.desc_size * efi.memmap.nr_map; + + if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { + pr_err("Failed to remap EFI memory map\n"); + return 0; + } + if (efi_runtime_disabled()) { pr_info("EFI runtime services will be disabled.\n"); return 0; @@ -129,13 +136,6 @@ static int __init arm_enable_runtime_services(void) pr_info("Remapping and enabling EFI services.\n"); - mapsize = efi.memmap.desc_size * efi.memmap.nr_map; - - if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { - pr_err("Failed to remap EFI memory map\n"); - return -ENOMEM; - } - if (!efi_virtmap_init()) { pr_err("UEFI virtual mapping missing or invalid -- runtime services will not be available\n"); return -ENOMEM; |