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    SubjectRe: [RFC PATCH 00/16] PTI support for x86-32
    On Tue, Jan 16, 2018 at 8:36 AM, Joerg Roedel <joro@8bytes.org> wrote:
    > From: Joerg Roedel <jroedel@suse.de>
    >
    > Hi,
    >
    > here is my current WIP code to enable PTI on x86-32. It is
    > still in a pretty early state, but it successfully boots my
    > KVM guest with PAE and with legacy paging. The existing PTI
    > code for x86-64 already prepares a lot of the stuff needed
    > for 32 bit too, thanks for that to all the people involved
    > in its development :)
    >
    > The patches are split as follows:
    >
    > - 1-3 contain the entry-code changes to enter and
    > exit the kernel via the sysenter trampoline stack.
    >
    > - 4-7 are fixes to get the code compile on 32 bit
    > with CONFIG_PAGE_TABLE_ISOLATION=y.
    >
    > - 8-14 adapt the existing PTI code to work properly
    > on 32 bit and add the needed parts to 32 bit
    > page-table code.
    >
    > - 15 switches PTI on by adding the CR3 switches to
    > kernel entry/exit.
    >
    > - 16 enables the Kconfig for all of X86
    >
    > The code has not run on bare-metal yet, I'll test that in
    > the next days once I setup a 32 bit box again. I also havn't
    > tested Wine and DosEMU yet, so this might also be broken.
    >

    If you pass all the x86 selftests, then Wine and DOSEMU are pretty
    likely to work :)

    --Andy

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