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KVM: nVMX: Add preemption timer support

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Provided the host has this feature, it's straightforward to offer it to
the guest as well. We just need to load to timer value on L2 entry if
the feature was enabled by L1 and watch out for the corresponding exit
reason.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka
2013-03-13 11:31:24 +01:00
committed by Gleb Natapov
parent c18911a23c
commit 0238ea913c
3 changed files with 20 additions and 5 deletions
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5
arch/x86/include/uapi/asm/vmx.h
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@ -65,6 +65,7 @@
#define EXIT_REASON_EOI_INDUCED 45
#define EXIT_REASON_EPT_VIOLATION 48
#define EXIT_REASON_EPT_MISCONFIG 49
#define EXIT_REASON_PREEMPTION_TIMER 52
#define EXIT_REASON_WBINVD 54
#define EXIT_REASON_XSETBV 55
#define EXIT_REASON_APIC_WRITE 56
@ -110,7 +111,7 @@
{ EXIT_REASON_EOI_INDUCED, "EOI_INDUCED" }, \
{ EXIT_REASON_INVALID_STATE, "INVALID_STATE" }, \
{ EXIT_REASON_INVD, "INVD" }, \
{ EXIT_REASON_INVPCID, "INVPCID" }
{ EXIT_REASON_INVPCID, "INVPCID" }, \
{ EXIT_REASON_PREEMPTION_TIMER, "PREEMPTION_TIMER" }
#endif /* _UAPIVMX_H */