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    SubjectRe: [PATCH v6 00/12] SVM cleanup and INVPCID feature support
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    On 3/10/21 9:31 AM, Paolo Bonzini wrote:
    > On 10/03/21 15:58, Babu Moger wrote:
    >> There is no upstream version 4.9.258.
    >
    > Sure there is, check out
    > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcdn.kernel.org%2Fpub%2Flinux%2Fkernel%2Fv4.x%2F&data=04%7C01%7Cbabu.moger%40amd.com%7Caeefc58416ed490faa7f08d8e3d99d72%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637509871127634618%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=re2Jj5P7IjN2UdmPTjTuKd1KIJLek84KlcnsXxgKYRc%3D&reserved=0
    >
    >
    > The easiest way to do it is to bisect on the linux-4.9.y branch of
    > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git.
    >
    Paolo, Thanks for pointing that out. Bisected linux-4.9.y branch.
    It is pointing at

    # git bisect good
    59094faf3f618b2d2b2a45acb916437d611cede6 is the first bad commit
    commit 59094faf3f618b2d2b2a45acb916437d611cede6
    Author: Borislav Petkov <bp@suse.de>
    Date: Mon Dec 25 13:57:16 2017 +0100

    x86/kaiser: Move feature detection up


    ... before the first use of kaiser_enabled as otherwise funky
    things happen:

    about to get started...
    (XEN) d0v0 Unhandled page fault fault/trap [#14, ec=0000]
    (XEN) Pagetable walk from ffff88022a449090:
    (XEN) L4[0x110] = 0000000229e0e067 0000000000001e0e
    (XEN) L3[0x008] = 0000000000000000 ffffffffffffffff
    (XEN) domain_crash_sync called from entry.S: fault at ffff82d08033fd08
    entry.o#create_bounce_frame+0x135/0x14d
    (XEN) Domain 0 (vcpu#0) crashed on cpu#0:
    (XEN) ----[ Xen-4.9.1_02-3.21 x86_64 debug=n Not tainted ]----
    (XEN) CPU: 0
    (XEN) RIP: e033:[<ffffffff81007460>]
    (XEN) RFLAGS: 0000000000000286 EM: 1 CONTEXT: pv guest (d0v0)

    Signed-off-by: Borislav Petkov <bp@suse.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    :040000 040000 e56bbc975c3fd1a774b6cc0d6699c0c24e66be1c
    e06231dccc8589b4baa0cd5759a37899b7ec71c1 M arch

    Not sure what is going on with this commit. Still looking.

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