On 09/12/2018 11:00 PM, Ard Biesheuvel wrote: > On 8 September 2018 at 18:23, Aaron Ma <aaron.ma@xxxxxxxxxxxxx> wrote: >> EFI GOP uses 64-bit frame buffer address in some BIOS. >> Add 64bit address support in efi earlyprintk. >> >> Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx> >> --- >> 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); > Please fix this in a way that works on 32-bit x86/PAE as well (i.e., > use a suitable type for base) > Right, I will send a v2 patch. Thanks, Aaron
