EFI GOP uses 64-bit frame buffer address in some BIOS. Add 64bit address support in efi earlyprintk.
Signed-off-by: Aaron Ma <[email protected]> --- arch/x86/platform/efi/early_printk.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c index 5fdacb322ceb..c0ae25f59acd 100644 --- a/arch/x86/platform/efi/early_printk.c +++ b/arch/x86/platform/efi/early_printk.c @@ -32,6 +32,8 @@ static __init int early_efi_map_fb(void) return 0; base = boot_params.screen_info.lfb_base; + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; size = boot_params.screen_info.lfb_size; efi_fb = ioremap(base, size); @@ -49,6 +51,8 @@ static __ref void *early_efi_map(unsigned long start, unsigned long len) unsigned long base; base = boot_params.screen_info.lfb_base; + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; if (efi_fb) return (efi_fb + start); -- 2.17.1
