| Message ID | 20230424165726.2245548-4-ardb@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | efi/x86: Avoid legacy decompressor during EFI boot | expand |
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c index a0bfd31358ba97b1..e136c94037dda8d3 100644 --- a/drivers/firmware/efi/libstub/x86-stub.c +++ b/drivers/firmware/efi/libstub/x86-stub.c @@ -787,6 +787,11 @@ asmlinkage unsigned long efi_main(efi_handle_t handle, efi_dxe_table = NULL; } + if (!boot_params->acpi_rsdp_addr) + boot_params->acpi_rsdp_addr = (unsigned long) + (get_efi_config_table(ACPI_20_TABLE_GUID) ?: + get_efi_config_table(ACPI_TABLE_GUID)); + /* * If the kernel isn't already loaded at a suitable address, * relocate it.
One of the actions performed by the decompressor is populating the RSDP address field in the boot_params struct, and when doing EFI boot, EFI configuration tables are the preferred source for this information. In preparation for removing the decompressor code from the EFI stub boot path, set this field from the EFI stub code. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> --- drivers/firmware/efi/libstub/x86-stub.c | 5 +++++ 1 file changed, 5 insertions(+)