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List:       kernel-hardening
Subject:    Re: [PATCH v7 15/17] KVM: arm64: disable LTO for the nVHE directory
From:       Sami Tolvanen <samitolvanen () google ! com>
Date:       2020-11-23 18:34:16
Message-ID: CABCJKudwt6xDUMADRjXU04bxZFFWOFOs_26TJGHV_vnP8Qs5Jw () mail ! gmail ! com
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On Mon, Nov 23, 2020 at 2:21 AM David Brazdil <dbrazdil@google.com> wrote:
>
> Hey Sami,
>
> On Wed, Nov 18, 2020 at 02:07:29PM -0800, Sami Tolvanen wrote:
> > We use objcopy to manipulate ELF binaries for the nVHE code,
> > which fails with LTO as the compiler produces LLVM bitcode
> > instead. Disable LTO for this code to allow objcopy to be used.
>
> We now partially link the nVHE code (generating machine code) before objcopy,
> so I think you should be able to drop this patch now. Tried building your
> branch without it, ran a couple of unit tests and all seems fine.

Great, thanks for testing this, David! I'll drop this patch from v8.

Sami
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