From: Aaron Ma <aaron.ma@canonical.com>
To: ard.biesheuvel@linaro.org, tglx@linutronix.de, x86@kernel.org,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
aaron.ma@canonical.com
Subject: [PATCH] x86/efi: earlyprintk - Add 64bit efi fb address support
Date: Sun, 9 Sep 2018 00:23:48 +0800 [thread overview]
Message-ID: <1536423828-5693-1-git-send-email-aaron.ma@canonical.com> (raw)
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@canonical.com>
---
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
next reply other threads:[~2018-09-08 16:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-08 16:23 Aaron Ma [this message]
2018-09-10 7:20 ` Ingo Molnar
2018-09-12 15:00 ` Ard Biesheuvel
2018-09-12 15:09 ` Aaron Ma
2018-09-12 18:00 ` [PATCH v2] " Aaron Ma
2018-09-12 18:39 ` Ard Biesheuvel
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