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On Mon, 2020-07-13 at 22:53 +0200, Francisco Blas Izquierdo Riera |
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(klondike) wrote: |
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> El 13/7/20 a las 22:07, Francisco Blas Izquierdo Riera (klondike) escribió: |
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> > El 13/7/20 a las 21:27, Michał Górny escribió: |
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> > > On Mon, 2020-07-13 at 19:33 +0200, Francisco Blas Izquierdo Riera |
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> > > (klondike) wrote: |
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> > > > El 13/7/20 a las 19:23, Michał Górny escribió: |
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> > > > > On Mon, 2020-07-13 at 19:07 +0200, Francisco Blas Izquierdo Riera |
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> > > > > (klondike) wrote: |
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> > > > > > Hi! |
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> > > > > > |
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> > > > > > We have currently two packages that have USE cpu-flags-x86-rdrand as there is no USE_EXPAND version available. This pattern is likely to confuse users as they may not be aware of the difference between dashes and underscores. |
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> > > > > > |
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> > > > > > Affected packages: |
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> > > > > > dev-haskell/cryptonite |
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> > > > > > dev-libs/json-c |
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> > > > > > |
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> > > > > I'm sorry but I haven't been following the big rdrand-AMD drama closely. |
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> > > > > Does the kernel mitigate broken RDRAND after resume these days? |
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> > > > > |
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> > > > AGESA patches do exist to address this issue: https://www.reddit.com/r/Amd/comments/cmza34/agesa_1003_abb_fixes_rdrandrdseed/ I suspect AMD microcode does too. |
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> > > > |
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> > > Lemme rephrase: is this something we should be warning our users before |
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> > > they enable the flag? I think we should aim to avoid the situation that |
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> > > cpuid2cpuflags enables this behind user's backs and their programs |
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> > > suddenly break as a result. |
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> > You then mean the other rdrand bug. |
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> > |
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> > Yes, current stable linux kernel (5.4.48) in amd64 does include the patch, I'm uncertain about prior kernel branches though but I don't expect many users on that confluence. |
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> > |
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> > The patch: https://lore.kernel.org/linux-doc/776cb5c2d33e7fd0d2893904724c0e52b394f24a.1565817448.git.thomas.lendacky@×××.com/ |
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> > The bug: https://bugzilla.kernel.org/show_bug.cgi?id=85911 |
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> > |
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> > |
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> I have checked also stable versions for other kernel branches and all seem to have the patch icluded. |
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> |
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> |
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LGTM then. |
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-- |
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Best regards, |
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Michał Górny |
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