Messages in this thread | | | Date | Fri, 12 Jun 2020 11:12:11 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance |
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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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