[x86] efi: Clear EFI_RUNTIME_SERVICES rather than EFI_BOOT by "noefi" boot parameter
svn path=/dists/sid/linux/; revision=19818
This commit is contained in:
parent
85989749d4
commit
ca97698828
|
@ -140,6 +140,8 @@ linux (3.2.38-1) UNRELEASED; urgency=low
|
||||||
- possible bugfix, race in lookup
|
- possible bugfix, race in lookup
|
||||||
- bugfix, half refreshed iinfo
|
- bugfix, half refreshed iinfo
|
||||||
- possible bugfix, au_lkup_by_ino() returns ESTALE
|
- possible bugfix, au_lkup_by_ino() returns ESTALE
|
||||||
|
* [x86] efi: Clear EFI_RUNTIME_SERVICES rather than EFI_BOOT by "noefi" boot
|
||||||
|
parameter
|
||||||
|
|
||||||
[ Aurelien Jarno ]
|
[ Aurelien Jarno ]
|
||||||
* [armhf/vexpress] Add kernel udebs.
|
* [armhf/vexpress] Add kernel udebs.
|
||||||
|
|
65
debian/patches/bugfix/x86/efi-Clear-EFI_RUNTIME_SERVICES-rather-than-EFI_BOOT-.patch
vendored
Normal file
65
debian/patches/bugfix/x86/efi-Clear-EFI_RUNTIME_SERVICES-rather-than-EFI_BOOT-.patch
vendored
Normal file
|
@ -0,0 +1,65 @@
|
||||||
|
From: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
|
||||||
|
Date: Thu, 14 Feb 2013 09:12:52 +0900
|
||||||
|
Subject: efi: Clear EFI_RUNTIME_SERVICES rather than EFI_BOOT by "noefi" boot
|
||||||
|
parameter
|
||||||
|
|
||||||
|
commit 1de63d60cd5b0d33a812efa455d5933bf1564a51 upstream.
|
||||||
|
|
||||||
|
There was a serious problem in samsung-laptop that its platform driver is
|
||||||
|
designed to run under BIOS and running under EFI can cause the machine to
|
||||||
|
become bricked or can cause Machine Check Exceptions.
|
||||||
|
|
||||||
|
Discussion about this problem:
|
||||||
|
https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
|
||||||
|
https://bugzilla.kernel.org/show_bug.cgi?id=47121
|
||||||
|
|
||||||
|
The patches to fix this problem:
|
||||||
|
efi: Make 'efi_enabled' a function to query EFI facilities
|
||||||
|
83e68189745ad931c2afd45d8ee3303929233e7f
|
||||||
|
|
||||||
|
samsung-laptop: Disable on EFI hardware
|
||||||
|
e0094244e41c4d0c7ad69920681972fc45d8ce34
|
||||||
|
|
||||||
|
Unfortunately this problem comes back again if users specify "noefi" option.
|
||||||
|
This parameter clears EFI_BOOT and that driver continues to run even if running
|
||||||
|
under EFI. Refer to the document, this parameter should clear
|
||||||
|
EFI_RUNTIME_SERVICES instead.
|
||||||
|
|
||||||
|
Documentation/kernel-parameters.txt:
|
||||||
|
===============================================================================
|
||||||
|
...
|
||||||
|
noefi [X86] Disable EFI runtime services support.
|
||||||
|
...
|
||||||
|
===============================================================================
|
||||||
|
|
||||||
|
Documentation/x86/x86_64/uefi.txt:
|
||||||
|
===============================================================================
|
||||||
|
...
|
||||||
|
- If some or all EFI runtime services don't work, you can try following
|
||||||
|
kernel command line parameters to turn off some or all EFI runtime
|
||||||
|
services.
|
||||||
|
noefi turn off all EFI runtime services
|
||||||
|
...
|
||||||
|
===============================================================================
|
||||||
|
|
||||||
|
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
|
||||||
|
Link: http://lkml.kernel.org/r/511C2C04.2070108@jp.fujitsu.com
|
||||||
|
Cc: Matt Fleming <matt.fleming@intel.com>
|
||||||
|
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
|
||||||
|
---
|
||||||
|
arch/x86/platform/efi/efi.c | 2 +-
|
||||||
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
||||||
|
|
||||||
|
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
|
||||||
|
index 77cf009..928bf83 100644
|
||||||
|
--- a/arch/x86/platform/efi/efi.c
|
||||||
|
+++ b/arch/x86/platform/efi/efi.c
|
||||||
|
@@ -87,7 +87,7 @@ EXPORT_SYMBOL(efi_enabled);
|
||||||
|
|
||||||
|
static int __init setup_noefi(char *arg)
|
||||||
|
{
|
||||||
|
- clear_bit(EFI_BOOT, &x86_efi_facility);
|
||||||
|
+ clear_bit(EFI_RUNTIME_SERVICES, &x86_efi_facility);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
early_param("noefi", setup_noefi);
|
|
@ -626,3 +626,4 @@ features/all/line6/0104-staging-line6-drop-dump-requests-from-variax-startup.pat
|
||||||
features/all/line6/0105-staging-line6-drop-dump-requests-from-pod-startup.patch
|
features/all/line6/0105-staging-line6-drop-dump-requests-from-pod-startup.patch
|
||||||
features/all/line6/0106-staging-line6-drop-unused-dumprequest-code.patch
|
features/all/line6/0106-staging-line6-drop-unused-dumprequest-code.patch
|
||||||
bugfix/all/mm-Try-harder-to-allocate-vmemmap-blocks.patch
|
bugfix/all/mm-Try-harder-to-allocate-vmemmap-blocks.patch
|
||||||
|
bugfix/x86/efi-Clear-EFI_RUNTIME_SERVICES-rather-than-EFI_BOOT-.patch
|
||||||
|
|
Loading…
Reference in New Issue