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    SubjectRe: [PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
    On Tue, Apr 28, 2020 at 05:17:14PM +0200, Joerg Roedel wrote:
    > From: Mike Stunes <mstunes@vmware.com>
    >
    > To avoid a future VMEXIT for a subsequent CPUID function, cache the
    > results returned by CPUID into an xarray.
    >
    > [tl: coding standard changes, register zero extension]
    >
    > Signed-off-by: Mike Stunes <mstunes@vmware.com>
    > Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
    > [ jroedel@suse.de: - Wrapped cache handling into vc_handle_cpuid_cached()
    > - Used lower_32_bits() where applicable
    > - Moved cache_index out of struct es_em_ctxt ]
    > Co-developed-by: Joerg Roedel <jroedel@suse.de>
    > Signed-off-by: Joerg Roedel <jroedel@suse.de>
    > ---
    > arch/x86/kernel/sev-es-shared.c | 12 ++--
    > arch/x86/kernel/sev-es.c | 119 +++++++++++++++++++++++++++++++-
    > 2 files changed, 124 insertions(+), 7 deletions(-)

    Okay, following the discussion, I am dropping this patch for now. We can
    revisit CPUID caching later when we have a better justification.

    Regards,

    Joerg

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