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nixpkgs/lib/kernel.nix

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linux: convert hardened-config to a structured one
2018-10-03 18:53:23 +09:00
{ lib, version }:
linux: translate config to structured config Instead of using a string to describe kernel config, use a nix attribute set, then converted to a string. - allows to override the config, aka convert 'yes' into 'modules' or vice-versa - while for now merging different configs is still crude (last spec wins), at least there should be only one CONFIG_XYZ value compared to the current string config where the first defined would be used and others ignored. [initial idea by copumpkin in 2016, a major rebase to 2018 by teto]
2016-01-05 09:22:43 -05:00
with lib;
treewide: remove redundant rec
2019-08-13 21:52:01 +00:00
{
linux: convert hardened-config to a structured one
2018-10-03 18:53:23 +09:00
# Common patterns/legacy
whenAtLeast = ver: mkIf (versionAtLeast version ver);
whenOlder = ver: mkIf (versionOlder version ver);
# range is (inclusive, exclusive)
whenBetween = verLow: verHigh: mkIf (versionAtLeast version verLow && versionOlder version verHigh);
linux: translate config to structured config Instead of using a string to describe kernel config, use a nix attribute set, then converted to a string. - allows to override the config, aka convert 'yes' into 'modules' or vice-versa - while for now merging different configs is still crude (last spec wins), at least there should be only one CONFIG_XYZ value compared to the current string config where the first defined would be used and others ignored. [initial idea by copumpkin in 2016, a major rebase to 2018 by teto]
2016-01-05 09:22:43 -05:00
linux: ability to merge structured configs This should make the composability of kernel configurations more straigthforward. - now distinguish freeform options from tristate ones - will look for a structured config in kernelPatches too one can now access the structuredConfig from a kernel via linux_test.configfile.structuredConfig in order to reinject it into another kernel, no need to rewrite the config from scratch The following merge strategies are used in case of conflict: -- freeform items must be equal or they conflict (mergeEqualOption) -- for tristate (y/m/n) entries, I use the mergeAnswer strategy which takes the best available value, "best" being defined by the user (by default "y" > "m" > "n", e.g. if one entry is both marked "y" and "n", "y" wins) -- if one item is both marked optional/mandatory, mandatory wins (mergeFalseByDefault)
2018-10-03 18:49:50 +09:00
# Keeping these around in case we decide to change this horrible implementation :)
option = x:
x // { optional = true; };
linux: translate config to structured config Instead of using a string to describe kernel config, use a nix attribute set, then converted to a string. - allows to override the config, aka convert 'yes' into 'modules' or vice-versa - while for now merging different configs is still crude (last spec wins), at least there should be only one CONFIG_XYZ value compared to the current string config where the first defined would be used and others ignored. [initial idea by copumpkin in 2016, a major rebase to 2018 by teto]
2016-01-05 09:22:43 -05:00
linux: ability to merge structured configs This should make the composability of kernel configurations more straigthforward. - now distinguish freeform options from tristate ones - will look for a structured config in kernelPatches too one can now access the structuredConfig from a kernel via linux_test.configfile.structuredConfig in order to reinject it into another kernel, no need to rewrite the config from scratch The following merge strategies are used in case of conflict: -- freeform items must be equal or they conflict (mergeEqualOption) -- for tristate (y/m/n) entries, I use the mergeAnswer strategy which takes the best available value, "best" being defined by the user (by default "y" > "m" > "n", e.g. if one entry is both marked "y" and "n", "y" wins) -- if one item is both marked optional/mandatory, mandatory wins (mergeFalseByDefault)
2018-10-03 18:49:50 +09:00
yes = { tristate = "y"; };
no = { tristate = "n"; };
module = { tristate = "m"; };
freeform = x: { freeform = x; };
linux: translate config to structured config Instead of using a string to describe kernel config, use a nix attribute set, then converted to a string. - allows to override the config, aka convert 'yes' into 'modules' or vice-versa - while for now merging different configs is still crude (last spec wins), at least there should be only one CONFIG_XYZ value compared to the current string config where the first defined would be used and others ignored. [initial idea by copumpkin in 2016, a major rebase to 2018 by teto]
2016-01-05 09:22:43 -05:00
}
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