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efi/arm*/libstub: Wire up GOP protocol to 'struct screen_info' 

This adds the code to the ARM and arm64 versions of the UEFI stub to
populate struct screen_info based on the information received from the
firmware via the GOP protocol.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1461614832-17633-23-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ard Biesheuvel 2016-04-25 21:06:54 +01:00 committed by Ingo Molnar
parent 801820bee9
commit f0827e18a7
1 changed files with 23 additions and 0 deletions
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23
drivers/firmware/efi/libstub/arm-stub.c
View File

@ -169,6 +169,25 @@ void efi_char16_printk(efi_system_table_t *sys_table_arg,
out->output_string(out, str);
}
static struct screen_info *setup_graphics(efi_system_table_t *sys_table_arg)
{
efi_guid_t gop_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
efi_status_t status;
unsigned long size;
void **gop_handle = NULL;
struct screen_info *si = NULL;
size = 0;
status = efi_call_early(locate_handle, EFI_LOCATE_BY_PROTOCOL,
&gop_proto, NULL, &size, gop_handle);
if (status == EFI_BUFFER_TOO_SMALL) {
si = alloc_screen_info(sys_table_arg);
if (!si)
return NULL;
efi_setup_gop(sys_table_arg, si, &gop_proto, size);
}
return si;
}
/*
* This function handles the architcture specific differences between arm and
@ -208,6 +227,7 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
unsigned long reserve_addr = 0;
unsigned long reserve_size = 0;
int secure_boot = 0;
struct screen_info *si;
/* Check if we were booted by the EFI firmware */
if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
@ -260,6 +280,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
__nokaslr = true;
}
si = setup_graphics(sys_table);
status = handle_kernel_image(sys_table, image_addr, &image_size,
&reserve_addr,
&reserve_size,
@ -341,6 +363,7 @@ fail_free_image:
efi_free(sys_table, image_size, *image_addr);
efi_free(sys_table, reserve_size, reserve_addr);
fail_free_cmdline:
free_screen_info(sys_table, si);
efi_free(sys_table, cmdline_size, (unsigned long)cmdline_ptr);
fail:
return EFI_ERROR;