diff options
author | Ard Biesheuvel <ardb@kernel.org> | 2022-10-11 18:10:39 +0300 |
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committer | Ard Biesheuvel <ardb@kernel.org> | 2022-11-09 14:42:02 +0300 |
commit | 732ea9db9d8a6a0444d18ed810cccb2428d8766b (patch) | |
tree | 186ea3e313ea11d0d5edae397074828c263e98d6 /arch/arm/kernel | |
parent | 06064800d92a1adac3717e86cc6ba5f98c0ef40e (diff) | |
download | linux-732ea9db9d8a6a0444d18ed810cccb2428d8766b.tar.xz |
efi: libstub: Move screen_info handling to common code
Currently, arm64, RISC-V and LoongArch rely on the fact that struct
screen_info can be accessed directly, due to the fact that the EFI stub
and the core kernel are part of the same image. This will change after a
future patch, so let's ensure that the screen_info handling is able to
deal with this, by adopting the arm32 approach of passing it as a
configuration table. While at it, switch to ACPI reclaim memory to hold
the screen_info data, which is more appropriate for this kind of
allocation.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r-- | arch/arm/kernel/efi.c | 31 |
1 files changed, 5 insertions, 26 deletions
diff --git a/arch/arm/kernel/efi.c b/arch/arm/kernel/efi.c index e50ad7eefc02..882104f43b3b 100644 --- a/arch/arm/kernel/efi.c +++ b/arch/arm/kernel/efi.c @@ -75,38 +75,13 @@ int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md) return 0; } -static unsigned long __initdata screen_info_table = EFI_INVALID_TABLE_ADDR; static unsigned long __initdata cpu_state_table = EFI_INVALID_TABLE_ADDR; const efi_config_table_type_t efi_arch_tables[] __initconst = { - {LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID, &screen_info_table}, {LINUX_EFI_ARM_CPU_STATE_TABLE_GUID, &cpu_state_table}, {} }; -static void __init load_screen_info_table(void) -{ - struct screen_info *si; - - if (screen_info_table != EFI_INVALID_TABLE_ADDR) { - si = early_memremap_ro(screen_info_table, sizeof(*si)); - if (!si) { - pr_err("Could not map screen_info config table\n"); - return; - } - screen_info = *si; - early_memunmap(si, sizeof(*si)); - - /* dummycon on ARM needs non-zero values for columns/lines */ - screen_info.orig_video_cols = 80; - screen_info.orig_video_lines = 25; - - if (memblock_is_map_memory(screen_info.lfb_base)) - memblock_mark_nomap(screen_info.lfb_base, - screen_info.lfb_size); - } -} - static void __init load_cpu_state_table(void) { if (cpu_state_table != EFI_INVALID_TABLE_ADDR) { @@ -145,7 +120,11 @@ void __init arm_efi_init(void) { efi_init(); - load_screen_info_table(); + if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { + /* dummycon on ARM needs non-zero values for columns/lines */ + screen_info.orig_video_cols = 80; + screen_info.orig_video_lines = 25; + } /* ARM does not permit early mappings to persist across paging_init() */ efi_memmap_unmap(); |