kvm: vmx: Introduce lapic_mode enumeration

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The local APIC can be in one of three modes: disabled, xAPIC or
x2APIC. (A fourth mode, "invalid," is included for completeness.)

Using the new enumeration can make some of the APIC mode logic easier
to read. In kvm_set_apic_base, for instance, it is clear that one
cannot transition directly from x2APIC mode to xAPIC mode or directly
from APIC disabled to x2APIC mode.

Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
[Check invalid bits even if msr_info->host_initiated.  Reported by
 Wanpeng Li. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Jim Mattson 2018-05-09 16:56:04 -04:00 • committed by Paolo Bonzini

parent ceef7d10df

commit 5887164942

2 changed files with 29 additions and 11 deletions

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14

arch/x86/kvm/lapic.h

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26

arch/x86/kvm/x86.c

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