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[PATCH] kvm: Two-way apic tpr synchronization

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We report the value of cr8 to userspace on an exit.  Also let userspace change
cr8 when we re-enter the guest.  The lets 64-bit guest code maintain the tpr
correctly.

Thanks for Yaniv Kamay for the idea.

Signed-off-by: Dor Laor <dor.laor@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dor Laor 2007-02-12 00:54:39 -08:00 • committed by Linus Torvalds
parent d92899a001
commit 54810342f1
2 changed files with 5 additions and 0 deletions
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include/linux/kvm.h
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@ -65,6 +65,8 @@ struct kvm_run {
__u8 ready_for_interrupt_injection;
__u8 if_flag;
__u16 padding2;
/* in (pre_kvm_run), out (post_kvm_run) */
__u64 cr8;
__u64 apic_base;