kvm: vmx: Reduce size of vmcs_field_to_offset_table

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The vmcs_field_to_offset_table was a rather sparse table of short
integers with a maximum index of 0x6c16, amounting to 55342 bytes. Now
that we are considering support for multiple VMCS12 formats, it would
be unfortunate to replicate that large, sparse table. Rotating the
field encoding (as a 16-bit integer) left by 6 reduces that table to
5926 bytes.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Jim Mattson 2017-12-22 12:13:13 -08:00 • committed by Radim Krčmář

parent d37f4267a7

commit 58e9ffae5e

1 changed files with 13 additions and 7 deletions

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arch/x86/kvm/vmx.c

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