On Tue, Apr 28, 2020 at 05:17:14PM +0200, Joerg Roedel wrote: > From: Mike Stunes <mstunes@xxxxxxxxxx> > > 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@xxxxxxxxxx> > Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx> > [ jroedel@xxxxxxx: - 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@xxxxxxx> > Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> > --- > 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
