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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 07:13:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 07:13:56 -0800
commitc8f5ed6ef972ed4fd10b0c2e2baec3b6803d3c73 (patch)
treee57a12ca1ed3b53c9cafc8bc99dd104bce40425e /Documentation
parent3717f613f48df0222311f974cf8a06c8a6c97bae (diff)
parent5c418dc789a3898717ebf2caa5716ba91a7150b2 (diff)
downloadlinux-c8f5ed6ef972ed4fd10b0c2e2baec3b6803d3c73.tar.bz2
Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar: "The main EFI changes in this cycle were: - Use 32-bit alignment for efi_guid_t - Allow the SetVirtualAddressMap() call to be omitted - Implement earlycon=efifb based on existing earlyprintk code - Various minor fixes and code cleanups from Sai, Ard and me" * 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: Fix build error due to enum collision between efi.h and ima.h efi/x86: Convert x86 EFI earlyprintk into generic earlycon implementation x86: Make ARCH_USE_MEMREMAP_PROT a generic Kconfig symbol efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted efi: Replace GPL license boilerplate with SPDX headers efi/fdt: Apply more cleanups efi: Use 32-bit alignment for efi_guid_t efi/memattr: Don't bail on zero VA if it equals the region's PA x86/efi: Mark can_free_region() as an __init function
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 74dddbf54cd1..a87418990d39 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1078,9 +1078,15 @@
specified address. The serial port must already be
setup and configured. Options are not yet supported.
+ efifb,[options]
+ Start an early, unaccelerated console on the EFI
+ memory mapped framebuffer (if available). On cache
+ coherent non-x86 systems that use system memory for
+ the framebuffer, pass the 'ram' option so that it is
+ mapped with the correct attributes.
+
earlyprintk= [X86,SH,ARM,M68k,S390]
earlyprintk=vga
- earlyprintk=efi
earlyprintk=sclp
earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]