[yocto] [meta-inte][rmc][PATCH v2 1/1] rmc: add support for alternative EFI bootloaders

[Cal Sullivan]

On 12/15/2016 10:23 AM, Todor Minchev wrote:
> On Thu, 2016-12-15 at 10:09 -0800, Cal Sullivan wrote:
>> On 12/13/2016 04:50 PM, Todor Minchev wrote:
>>> On Tue, 2016-12-13 at 16:22 -0800, Jianxun Zhang wrote:
>>>>> On Dec 13, 2016, at 2:56 PM, Todor Minchev <todor.minchev at linux
>>>>> .intel.com> wrote:
>>>>>
>>>>> RMC was previously configured to work only with the systemd-
>>>>> boot EFI
>>>>> bootloader. With this commit we can specify alternative
>>>>> bootloaders by
>>>>> setting the RMC_BOOTLOADER variable in local.conf. If
>>>>> RMC_BOOTLOADER is
>>>>> not set systemd-boot will be used by default.
>>>>>
>>>>> Signed-off-by: Todor Minchev <todor.minchev at linux.intel.com>
>>>>> ---
>>>>> Remove references to grub-efi and gummiboot from V1.
>>>>>
>>>>> classes/{rmc-systemd-boot.bbclass => rmc-boot.bbclass} |  5
>>>>> +++--
>>>>> conf/machine/include/meta-intel.inc                    |  2 +-
>>>>> documentation/rmc/README                               | 16
>>>>> +++++++++++++---
>>>>> 3 files changed, 17 insertions(+), 6 deletions(-)
>>>>> rename classes/{rmc-systemd-boot.bbclass => rmc-boot.bbclass}
>>>>> (73%)
>>>>>
>>>>> diff --git a/classes/rmc-systemd-boot.bbclass b/classes/rmc-
>>>>> boot.bbclass
>>>>> similarity index 73%
>>>>> rename from classes/rmc-systemd-boot.bbclass
>>>>> rename to classes/rmc-boot.bbclass
>>>>> index ad2cf10..a1f2093 100644
>>>>> --- a/classes/rmc-systemd-boot.bbclass
>>>>> +++ b/classes/rmc-boot.bbclass
>>>>> @@ -1,9 +1,10 @@
>>>>> -# rmc-systemd-boot bbclass
>>>>> +# rmc-boot bbclass
>>>>> # Deploy central RMC database file to ESP
>>>>>
>>>>> IMAGE_INSTALL_append = " rmc"
>>>>> +RMC_BOOTLOADER ?= "systemd-boot”
>>>> Maybe this is what we could have now without bothering OE. It is
>>>> better than the corrent code at the cost of another variable to
>>>> user. I hope in the future we could get rid of  the dependency to
>>>> EFI_PROVIDER (e.g. bz10084).
>>>>
>>>> Also refer to my comment for the document change at the below.
>>>>> -inherit systemd-boot
>>>>> +inherit ${RMC_BOOTLOADER}
>>>>>
>>>>> do_bootimg[depends] += "${MLPREFIX}rmc-db:do_deploy"
>>>>>
>>>>> diff --git a/conf/machine/include/meta-intel.inc
>>>>> b/conf/machine/include/meta-intel.inc
>>>>> index c7555ce..fd0a792 100644
>>>>> --- a/conf/machine/include/meta-intel.inc
>>>>> +++ b/conf/machine/include/meta-intel.inc
>>>>> @@ -32,7 +32,7 @@ MACHINE_ESSENTIAL_EXTRA_RDEPENDS_append = "${
>>>>> @bb.utils.contains('MACHINE_FEATURE
>>>>> # merge the microcode data in the final initrd image.
>>>>> INITRD_LIVE_prepend = "${@bb.utils.contains('MACHINE_FEATURES',
>>>>> 'intel-ucode', '${DEPLOY_DIR_IMAGE}/microcode.cpio ', '', d)}"
>>>>>
>>>>> -EFI_PROVIDER ?= "rmc-systemd-boot"
>>>>> +EFI_PROVIDER ?= "rmc-boot"
>>>>>
>>>>> # Add general MACHINEOVERRIDE for meta-intel
>>>>> MACHINEOVERRIDES =. "intel-x86-common:"
>>>>> diff --git a/documentation/rmc/README
>>>>> b/documentation/rmc/README
>>>>> index 2427ffd..dbee6b6 100644
>>>>> --- a/documentation/rmc/README
>>>>> +++ b/documentation/rmc/README
>>>>> @@ -165,14 +165,24 @@ steps still can override results from
>>>>> this hook for boot entries and KBOOTPARAM.
>>>>>
>>>>> Enable RMC Feature
>>>>> -------------------------------------------------------------
>>>>> -------------------
>>>>> -To Enable RMC feature in build, add the below lines in a conf
>>>>> file:
>>>>> +To enable the RMC feature please add the following variables
>>>>> to your local.conf.
>>>>> +
>>>>> DISTRO_FEATURES_append = " rmc"
>>>>> -EFI_PROVIDER = "rmc-systemd-boot"
>>>>> +EFI_PROVIDER = "rmc-boot"
>>>>> +
>>>>> +The default EFI bootloader used with RMC is systemd-boot. To
>>>>> change the default
>>>>> +bootloader please overwrite the RMC_BOOTLOADER variable in
>>>>> your local.conf
>>>>>
>>>>> Note:
>>>>> Image could be still bootable if you only have either of two
>>>>> lines, but RMC
>>>>> feature won't be fully functional.
>>>>>
>>>>> +To install only the RMC client with the systemd-boot
>>>>> bootloader without
>>>>> +including a default RMC database file, add the following lines
>>>>> to your
>>>>> +local.conf:
>>>>> +
>>>>> +EFI_PROVIDER = "systemd-boot"
>>>>> +IMAGE_INSTALL_append = " rmc”
>>>> I think this use case could confuse for user without much
>>>> benefit. And actually they still can set EFI_PROVIDER to any
>>>> available efi bootloaders to get this effect as long as it is not
>>>> “rmc-boot”, right?
>>>> Maybe we should just say “you won’t get rmc database deployed if
>>>> you set EFI_PROVIDER to any values not rmc-boot."
>>> Yes, this can be another way to phrase this.
>> Is there going to be a v3 or is it sufficient as-is?
> This is OK for now. I will reword the README after we add full RMC
> support to grub-efi.
Great, thanks. I will merge it shortly along with Ross' changes.

>   
>> Thanks,
>> Cal
>>>
>>>>> Examples
>>>>> @@ -190,7 +200,7 @@ EXAMPLE 1: Support a new board type:
>>>>> (1) enable the feature and do a build to get a live-boot image
>>>>> by adding these
>>>>>       lines in conf/local.conf:
>>>>>       DISTRO_FEATURES_append = " rmc"
>>>>> -    EFI_PROVIDER = "rmc-systemd-boot"
>>>>> +    EFI_PROVIDER = "rmc-boot"
>>>>>
>>>>> (2) flash the image to a USB stick and boot it on your board
>>>>>