The patch titled
x86_64 EFI runtime service support: document for EFI runtime services
has been added to the -mm tree. Its filename is
x86_64-efi-runtime-service-support-document-for-efi-runtime-services.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
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------------------------------------------------------
Subject: x86_64 EFI runtime service support: document for EFI runtime services
From: "Huang, Ying" <ying.huang@xxxxxxxxx>
This patch adds document for EFI x86_64 runtime services support.
Signed-off-by: Chandramouli Narayanan <mouli@xxxxxxxxxxxxxxx>
Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/x86_64/boot-options.txt | 9 ++++++++-
Documentation/x86_64/uefi.txt | 9 +++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff -puN Documentation/x86_64/boot-options.txt~x86_64-efi-runtime-service-support-document-for-efi-runtime-services Documentation/x86_64/boot-options.txt
--- a/Documentation/x86_64/boot-options.txt~x86_64-efi-runtime-service-support-document-for-efi-runtime-services
+++ a/Documentation/x86_64/boot-options.txt
@@ -110,7 +110,7 @@ Idle loop
Rebooting
- reboot=b[ios] | t[riple] | k[bd] | a[cpi] [, [w]arm | [c]old]
+ reboot=b[ios] | t[riple] | k[bd] | a[cpi] | e[fi] [, [w]arm | [c]old]
bios Use the CPU reboot vector for warm reset
warm Don't set the cold reboot flag
cold Set the cold reboot flag
@@ -119,6 +119,9 @@ Rebooting
acpi Use the ACPI RESET_REG in the FADT. If ACPI is not configured or the
ACPI reset does not work, the reboot path attempts the reset using
the keyboard controller.
+ efi Use efi reset_system runtime service. If EFI is not configured or the
+ EFI reset does not work, the reboot path attempts the reset using
+ the keyboard controller.
Using warm reset will be much faster especially on big memory
systems because the BIOS will not go through the memory check.
@@ -303,4 +306,8 @@ Debugging
newfallback: use new unwinder but fall back to old if it gets
stuck (default)
+EFI
+
+ noefi Disable EFI support
+
Miscellaneous
diff -puN Documentation/x86_64/uefi.txt~x86_64-efi-runtime-service-support-document-for-efi-runtime-services Documentation/x86_64/uefi.txt
--- a/Documentation/x86_64/uefi.txt~x86_64-efi-runtime-service-support-document-for-efi-runtime-services
+++ a/Documentation/x86_64/uefi.txt
@@ -19,6 +19,10 @@ Mechanics:
- Build the kernel with the following configuration.
CONFIG_FB_EFI=y
CONFIG_FRAMEBUFFER_CONSOLE=y
+ If EFI runtime services are expected, the following configuration should
+ be selected.
+ CONFIG_EFI=y
+ CONFIG_EFI_VARS=y or m # optional
- Create a VFAT partition on the disk
- Copy the following to the VFAT partition:
elilo bootloader with x86_64 support, elilo configuration file,
@@ -27,3 +31,8 @@ Mechanics:
can be found in the elilo sourceforge project.
- Boot to EFI shell and invoke elilo choosing the kernel image built
in first step.
+- 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
+ reboot_type=k turn off EFI reboot runtime service
_
Patches currently in -mm which might be from ying.huang@xxxxxxxxx are
x86_64-efi-boot-support-efi-frame-buffer.patch
x86_64-efi-boot-support-efi-boot-document.patch
x86_64-efi-runtime-service-support-efi-basic-runtime-service-support.patch
x86_64-efi-runtime-service-support-efi-runtime-services.patch
x86_64-efi-runtime-service-support-document-for-efi-runtime-services.patch
x86_64-efi-runtime-service-support-remove-duplicated-code-from-efi_32c.patch
vmcoreinfo-add-the-array-length-of-free_list-for-filtering-free-pages.patch
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